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WO2023036344A1 - 风储系统一次调频协调控制方法、系统、设备及存储介质 - Google Patents

风储系统一次调频协调控制方法、系统、设备及存储介质 Download PDF

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WO2023036344A1
WO2023036344A1 PCT/CN2022/118531 CN2022118531W WO2023036344A1 WO 2023036344 A1 WO2023036344 A1 WO 2023036344A1 CN 2022118531 W CN2022118531 W CN 2022118531W WO 2023036344 A1 WO2023036344 A1 WO 2023036344A1
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frequency modulation
power
energy storage
storage system
wind
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PCT/CN2022/118531
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English (en)
French (fr)
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李相俊
董立志
贾学翠
惠东
刘超群
王凯丰
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中国电力科学研究院有限公司
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Publication of WO2023036344A1 publication Critical patent/WO2023036344A1/zh

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24Arrangements for preventing or reducing oscillations of power in networks
    • H02J3/241The oscillation concerning frequency
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/10Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • H02J2300/28The renewable source being wind energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • the disclosure belongs to the field of electrical engineering, and relates to a primary frequency modulation coordinated control method, system, equipment and storage medium of a wind storage system.
  • Wind power Due to its rich reserves, renewable, wide distribution, and non-polluting characteristics, wind power has attracted worldwide attention and has become an important part of power supply. In a power system with a high proportion of new energy, a large number of new energy sources will lead to degradation of system frequency characteristics, and frequency adjustment is often required. Wind turbines are generally controlled according to the maximum wind energy capture. When actively supporting a frequency modulation, the method of reserve capacity is often used, which is not economical.
  • the current related technologies generally combine the wind power system with the energy storage system to form a wind storage system to realize frequency regulation.
  • the patent application CN108011381A discloses a frequency modulation control method for an integrated wind-storage system.
  • an energy storage device is connected in parallel on the DC bus of the wind turbine converter, and the wind turbine and the energy storage device are used as a whole to supply power to the system.
  • the control of the power of the energy storage device can realize the maximum power tracking of the wind turbine and at the same time make the unit have the inertia response characteristics of the traditional synchronous generator, so that the wind-storage integrated system can be similar to the traditional synchronous generator.
  • Patent application CN112600225A discloses a control method and system for primary frequency regulation of wind storage system, the method includes the underlying double fed asynchronous wind generator (Double Fed Induction Generator, DFIG) vector control and energy storage system (Energy Storage System, ESS) double closed-loop control, upper layer power consistency control and state of charge (State Of Charge, SOC) consistency control.
  • DFIG Double Fed Induction Generator
  • ESS Energy Storage System
  • SOC State Of Charge
  • the bottom control ensures the normal operation of the wind turbine and the energy storage system
  • the upper control adjusts the power distribution of the wind turbine and the energy storage system: based on power consistency control, it ensures that the energy storage device can adjust the energy storage frequency modulation power output in real time according to its different capacity; based on SOC consistency
  • the protocol adjusts the reference power of the DFIG grid-side converter, so that all energy storage devices can adjust their output according to the SOC under the premise of simultaneous charging and discharging.
  • the energy storage system is used as a whole to perform frequency modulation power response, and it is only used to realize the frequency modulation function.
  • the energy storage system often includes multiple energy storage units, and it is difficult to allocate the frequency modulation power of each energy storage unit reasonably, which makes the consistency between the energy storage units in the energy storage system worse, which in turn leads to poor frequency modulation performance of the entire wind storage system.
  • Embodiments of the present disclosure provide a wind storage system primary frequency modulation coordinated control method, system, equipment and storage medium.
  • the present disclosure provides a method for coordinated control of primary frequency modulation of a wind storage system, including the following steps:
  • the method for obtaining the frequency regulation power demand of the wind storage system includes: obtaining the grid frequency of the grid connection point of the wind storage system and the rated frequency of the grid; is 0; otherwise, according to the frequency deviation between the grid frequency and the rated frequency of the grid, and the preset frequency modulation adaptive coefficient, the frequency modulation power demand of the wind storage system is obtained;
  • the grid frequency When the grid frequency is within the preset frequency dead zone range, it also includes: obtaining the state of charge and rated power of the energy storage system; according to the state of charge and rated power of the energy storage system, and preset self-recovery Coefficient and preset return state of charge range, as well as grid frequency and frequency dead zone range, to obtain the return power of the energy storage system; to obtain the state of charge of each energy storage unit, according to the return power of the energy storage system and each energy storage unit According to the state of charge of each energy storage unit, the return power of each energy storage unit is obtained; according to the return power of each energy storage unit, each energy storage unit is controlled to perform energy storage return;
  • the frequency modulation power demand of the wind storage system is obtained;
  • the frequency modulation power demand of the energy storage system According to the frequency modulation power demand of the energy storage system, and the current maximum frequency modulation power, state of charge and operation state of each energy storage unit, the frequency modulation power demand of each energy storage unit is obtained;
  • Each energy storage unit is controlled to perform a frequency modulation according to the frequency modulation power demand of each energy storage unit.
  • the return power of the energy storage system After the return power of the energy storage system is obtained, it also includes: obtaining the boundary value of the power grid withstand power change, and updating the return power of the energy storage system to the comparison between the return power of the energy storage system and the boundary value of the power grid withstand power change. small value.
  • the preset frequency modulation adaptive coefficient includes several coefficient values, one coefficient value corresponds to a frequency deviation range, and the larger the coefficient value is, the larger the boundary value of the corresponding frequency deviation range is;
  • the method of obtaining the frequency modulation power demand of the wind storage system includes: according to the frequency deviation range of the frequency deviation between the grid frequency and the grid rated frequency, from the preset frequency modulation The corresponding coefficient value is selected from the adaptive coefficient, and the frequency modulation power demand of the wind storage system is obtained according to the frequency deviation between the grid frequency and the rated frequency of the grid and the selected coefficient value.
  • the method for obtaining the frequency modulation power demand of the energy storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system includes: according to the maximum frequency modulation power of the energy storage system, the minimum abandoned wind power of the wind power system in the wind storage system is
  • the allocation principle is to allocate the frequency modulation power demand of the wind storage system, and in the case that the frequency modulation power demand of the wind storage system is reduced power, allocate the frequency modulation power demand of the wind power storage system to the wind power system, and obtain the frequency modulation power demand of the energy storage system.
  • the method for obtaining the current maximum frequency modulation power of each energy storage unit in the energy storage system includes: obtaining the current power and rated power of each energy storage unit in the energy storage system; according to the current power and rated power of each energy storage unit in the energy storage system power to obtain the current maximum frequency modulation power of each energy storage unit in the energy storage system.
  • the running state includes a start-stop state, a discharge-allowed state and a charge-allowed state.
  • the method for obtaining the frequency modulation power demand of each energy storage unit according to the frequency modulation power demand of the energy storage system, and the current maximum frequency modulation power, state of charge and operation state of each energy storage unit includes: according to the frequency modulation power demand of the energy storage system , as well as the current maximum frequency modulation power, state of charge and operation state of each energy storage unit, with the consistency of state of charge of each energy storage unit as the power allocation principle, allocate the frequency modulation power demand of the energy storage system, and obtain the energy storage unit FM power requirements.
  • each energy storage unit After obtaining the frequency modulation power demand of each energy storage unit, it also includes: obtaining the current power and rated power of each energy storage unit; obtaining the power constraint of each energy storage unit according to the current power and rated power of each energy storage unit, and Energy unit power constraints check the frequency modulation power requirements of each energy storage unit; in the case of failure to pass the check, modify the operation status of the failed energy storage unit, and according to the frequency modulation power demand of the energy storage system, and each storage unit
  • the current maximum frequency modulation power, state of charge and modified operating state of the energy storage unit based on the consistency of the state of charge of each energy storage unit as the power allocation principle, redistribute the frequency modulation power requirements of the energy storage system, and update according to the redistribution results Frequency modulation power demand of each energy storage unit.
  • the method for controlling each energy storage unit to perform a frequency modulation according to the frequency modulation power demand of each energy storage unit includes: obtaining the current power of each energy storage unit, and superimposing the current power of each energy storage unit with the frequency modulation power demand of each energy storage unit to obtain each energy storage unit.
  • the frequency modulation power of the energy storage unit is used to control each energy storage unit to run at the frequency modulation power of each energy storage unit.
  • It also includes: obtaining the frequency modulation power demand of the wind power system in the wind storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system; controlling the wind power system to perform a frequency modulation according to the frequency modulation power demand of the wind power system.
  • the method of obtaining the frequency modulation power demand of the wind power system in the wind storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system includes: according to the maximum frequency modulation power of the energy storage system, the wind power system in the wind storage system is used to The minimum power is the allocation principle, and the frequency modulation power demand of the wind storage system is allocated, and when the frequency modulation power demand of the wind storage system is reduced power, the frequency modulation power demand of the wind power system is allocated to the wind power system, and the wind power system in the wind storage system is obtained FM power demand.
  • the method for controlling the wind power system to perform a frequency modulation according to the frequency modulation power demand of the wind power system includes: obtaining the current power of the wind power system, superimposing the current power of the wind power system on the frequency modulation power demand of the wind power system to obtain the frequency modulation power of the wind power system, and controlling the wind power system with the frequency modulation of the wind power system Power running.
  • the present disclosure provides a wind storage system primary frequency modulation coordinated control device, including:
  • the first data acquisition module is configured to acquire the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system in the wind storage system;
  • the first demand allocation module is configured to obtain the frequency modulation power demand of the energy storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system;
  • the second data acquisition module is configured to acquire the current maximum frequency modulation power, charge state and operation state of each energy storage unit in the energy storage system;
  • the second demand allocation module is configured to obtain the frequency modulation power demand of each energy storage unit according to the frequency modulation power demand of the energy storage system, and the current maximum frequency modulation power, state of charge and operation state of each energy storage unit;
  • the first control module is configured to control each energy storage unit to perform frequency modulation once according to the frequency modulation power demand of each energy storage unit.
  • the first data acquisition module includes a wind storage demand acquisition module, and the wind storage demand acquisition module is configured to acquire the grid frequency and the grid rated frequency of the grid connection point of the wind storage system; when the grid frequency is within the preset frequency dead zone range , the frequency modulation power demand of the wind storage system is 0; otherwise, according to the frequency deviation between the grid frequency and the grid rated frequency, and the preset frequency modulation adaptive coefficient, the frequency modulation power demand of the wind storage system is obtained.
  • the demand acquisition module of the wind storage system is also configured to obtain the state of charge and rated power of the energy storage system when the grid frequency is within the preset frequency dead zone range; according to the state of charge and rated power of the energy storage system , as well as the preset self-recovery coefficient and the preset return state of charge range, as well as the grid frequency and frequency dead zone range, to obtain the return power of the energy storage system; to obtain the state of charge of each energy storage unit, according to the energy storage system
  • the regressed power of each energy storage unit and the state of charge of each energy storage unit are used to obtain the regressed power of each energy storage unit; according to the regressed power of each energy storage unit, each energy storage unit is controlled to perform energy storage reversion.
  • the present disclosure provides a primary frequency modulation coordination control system of a wind storage system, including a data acquisition device, a communication device, and the above-mentioned primary frequency modulation coordination control equipment of the wind storage system;
  • Both the data acquisition device and the communication device are connected to the primary frequency modulation coordination control equipment of the wind storage system; when in use, the data acquisition device is connected to the grid-connected point of the wind storage system, the control unit of the wind power system in the wind storage system and the storage in the wind storage system
  • the energy system control unit is connected
  • the communication device is connected to the wind power system control unit and the energy storage converter PCS of each energy storage unit in the energy storage system;
  • the data acquisition device is configured to collect the grid frequency of the grid-connected point of the wind storage system, as well as the operation data of the wind power system and the energy storage system, and send them to the primary frequency modulation coordination control equipment of the wind storage system;
  • the communication device is configured as a data exchange between the primary frequency modulation coordination control equipment of the wind storage system, the control unit of the wind power system and the PCS of each energy storage unit.
  • the present disclosure provides a computer device, including a memory, a processor, and a computer program stored in the memory and operable on the processor.
  • the processor executes the computer program, the above-mentioned risk is realized.
  • the steps of the storage system primary frequency modulation coordination control method are described in detail below.
  • the present disclosure provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned primary frequency modulation coordinated control method for a wind storage system are implemented.
  • the primary frequency modulation coordination control method of the disclosed wind storage system realizes the determination of the frequency modulation power demand of the energy storage system, and at the same time, according to the frequency modulation power demand of the energy storage system, and The current maximum frequency modulation power, state of charge and operation state of each energy storage unit are obtained to obtain the frequency modulation power demand of each energy storage unit.
  • the energy storage system realizes The reasonable allocation of frequency modulation power requirements of energy units improves the consistency and controllability of each energy storage unit, thereby improving the ability of the entire energy storage system to respond to primary frequency modulation.
  • Fig. 1 is a flow chart of a primary frequency modulation coordinated control method for a wind storage system provided by an embodiment of the present disclosure
  • FIG. 2 is a power-frequency response curve diagram of a wind power system participating in primary frequency regulation provided by an embodiment of the present disclosure
  • Fig. 3 is a curve diagram of frequency modulation adaptive coefficient of wind storage coordinated control provided by an embodiment of the present disclosure
  • Fig. 4 is a flow chart of another coordinated control method for wind storage primary frequency regulation control provided by an embodiment of the present disclosure
  • Fig. 5 is a structural block diagram of a wind storage system primary frequency modulation coordination control device provided by an embodiment of the present disclosure
  • Fig. 6 is a structural block diagram of a primary frequency modulation coordinated control system of a wind storage system provided by an embodiment of the present disclosure.
  • the words “if”, “if” as used herein may be interpreted as “at” or “when” or “in response to determining” or “in response to detecting”.
  • the phrases “if determined” or “if detected (the stated condition or event)” could be interpreted as “when determined” or “in response to the determination” or “when detected (the stated condition or event) )” or “in response to detection of (a stated condition or event)”.
  • a coordinated control of the primary frequency regulation of the wind storage system uses energy storage technology to cooperate with wind power output, responds to the primary frequency regulation demand of the power grid, and improves the combined operation capacity of wind and storage.
  • the primary frequency modulation coordinated control method of the wind storage system includes the following steps.
  • the method for obtaining the frequency modulation power demand of the wind storage system includes: S11: obtaining the grid frequency of the grid-connected point of the wind storage system and the rated frequency of the grid; S12: when the grid frequency is within the preset frequency dead zone range, The frequency modulation power demand of the storage system is 0; S13: Otherwise, according to the frequency deviation between the grid frequency and the grid rated frequency, and the preset frequency modulation adaptive coefficient, the frequency modulation power demand of the wind storage system is obtained.
  • the frequency of the grid connection point of the wind storage system is directly collected through the voltage transformer and the current transformer, so that a quick judgment can be made on the change of the grid frequency.
  • the frequency fluctuation dead zone is generally ⁇ 0.05; Limit value, when the grid frequency exceeds the set limit value range, the energy storage system will no longer respond to a frequency modulation.
  • the frequency modulation power demand ⁇ P f and the rated power P The ratio of N is the active power limiting coefficient ⁇ , namely: The limiting coefficient is set according to the actual situation and defined as ⁇ [ ⁇ min , ⁇ max ]. According to the industry standard "DLT 1870-2018 Power System Network Source Coordination Technical Specifications", the maximum value of ⁇ is not less than 10%, for example It is set to 1% to 20%, that is, the ratio of the absolute value of the regulated active power variation ⁇ P f to the rated power is within 1% to 20% to output the frequency modulation power.
  • the frequency modulation power demand of the wind storage system is 0.
  • the frequency deviation between the grid frequency and the grid rated frequency is obtained according to the acquired grid frequency and the grid rated frequency, and the frequency deviation and the preset frequency modulation self
  • the adaptation coefficient is used to obtain the frequency modulation power demand of the wind storage system.
  • the frequency modulation power demand ⁇ P f of the wind storage system is obtained by the following formula (1):
  • m is the preset frequency modulation adaptive coefficient
  • f d represents the boundary value of the frequency dead zone range, namely: f max and f min represent the upper and lower boundaries of the frequency modulation dead zone
  • f represents the grid frequency
  • the preset FM adaptive coefficient includes several coefficient values, one coefficient value corresponds to a frequency deviation range, and the larger the coefficient value, the boundary of the corresponding frequency deviation range The larger the value is;
  • the method for obtaining the frequency modulation power demand of the wind storage system according to the frequency deviation between the grid frequency and the grid rated frequency and the preset frequency modulation adaptive coefficient includes: according to the frequency deviation between the grid frequency and the grid rated frequency For the frequency deviation range to which the frequency deviation belongs, the corresponding coefficient value is selected from the preset frequency modulation adaptive coefficients, and the frequency modulation power demand of the wind storage system is obtained according to the frequency deviation between the grid frequency and the grid rated frequency and the selected coefficient value.
  • f1 and f2 are used as distinguishing points.
  • the coefficient value of the frequency modulation self-adaptive coefficient increases to accelerate frequency adjustment.
  • the frequency modulation adaptive coefficient can be adjusted according to the actual situation, f m and f n represent the upper and lower limits of frequency modulation respectively, when the grid frequency exceeds the limit value, the wind storage system will no longer increase the frequency modulation power.
  • the SOC of each energy storage unit is restored to a reference value without requiring the energy storage system to perform frequency modulation SOC b is called energy storage SOC autoregressive.
  • the grid frequency when the grid frequency is within the preset frequency dead zone range, it also includes: S14: Obtain the state of charge and rated power of the energy storage system; S15: According to the state of charge and rated power of the energy storage system, and the preset The set self-recovery coefficient and the preset return state of charge range, as well as the grid frequency and frequency dead zone range, the grid frequency includes the actual frequency of the grid and the rated frequency of the grid, and the return power of the energy storage system is obtained; S16: Get each energy storage unit According to the state of charge of the energy storage system and the state of charge of each energy storage unit, the return power of each energy storage unit is obtained.
  • S17 Control each energy storage unit to perform energy storage return according to the return power of each energy storage unit , that is, SOC autoregressive.
  • the return power of the energy storage system is used as the frequency modulation power demand of the wind storage system, thus, the frequency modulation power demand of the wind storage system is updated by the following formula (2):
  • ⁇ P adj is the return power of the energy storage system.
  • ⁇ P adj is determined according to the SOC of the energy storage system. Firstly, the SOC of the energy storage system is divided into SOC min , SOC l , SOC b , SOC h and SOC max , which increase sequentially. When the system SOC is lower than SOC l or higher than SOC h , it is necessary to perform SOC self-recovery adjustment based on SOC b , and the return power ⁇ P adj of the energy storage system is expressed by the following formula (3):
  • is the self-recovery coefficient, which can be set according to the actual situation
  • P ESS,N is the rated power of the energy storage system.
  • the power grid frequency affects the fluctuation beyond the frequency dead zone range. Therefore, it is necessary to consider the power change boundary value that the power grid can withstand frequency fluctuation, including the power change boundary value of the frequency rise and the power change boundary value of the frequency drop.
  • the following formula (4) is used to determine the power change boundary value of the grid to withstand frequency drop
  • ⁇ % is the difference rate of primary frequency regulation
  • f N is the rated frequency of the power grid
  • f is the actual frequency of the power grid.
  • the power change boundary value of the power grid to withstand frequency rise is determined by the following formula (5):
  • the return power needs to be adjusted to the smaller value of the power change boundary value of the power grid to withstand frequency fluctuations and the current return power, namely:
  • the adjusted regressive power is the current regressive power. If the current return power is larger than the power change boundary value of the grid to withstand frequency fluctuations, then the adjusted return power is the power change boundary value of the grid to withstand frequency fluctuations, then, according to the self-regression power of the energy storage system, calculate each energy storage
  • the method of the regression power of the unit is expressed by the following formula (7):
  • ⁇ p adj,i represents the autoregressive power of the i-th energy storage unit
  • SOC i represents the state of charge of the i-th energy storage unit
  • the method for obtaining the frequency modulation power demand of the energy storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system includes: according to the maximum frequency modulation power of the energy storage system, the minimum abandoned wind power of the wind power system in the wind storage system is
  • the allocation principle is to allocate the frequency modulation power demand of the wind storage system, and in the case that the frequency modulation power demand of the wind storage system is reduced power, allocate the frequency modulation power demand of the wind power storage system to the wind power system, and obtain the frequency modulation power demand of the energy storage system.
  • the distribution result of the frequency modulation power demand of the wind storage system is calculated. Since most wind turbines are controlled according to the maximum wind energy capture, and wind turbines often adopt the maximum power point tracking (MPPT) control method, therefore, the response frequency drop of the wind turbine is not considered, and only when the SOC of each energy storage unit reaches the maximum value or the storage When the frequency modulation power of the system can respond to the maximum value and still does not meet the system frequency modulation power demand, the wind turbine abandonment is considered.
  • the energy storage system responds to the primary frequency modulation power ⁇ P ESS, f needs to satisfy the following formula (8):
  • ⁇ P w,f represents the curtailed wind power of the wind power system in response to primary frequency regulation.
  • the method for obtaining the current maximum frequency modulation power of each energy storage unit in the energy storage system includes: obtaining the current power and rated power of each energy storage unit in the energy storage system; according to the current power of each energy storage unit in the energy storage system and the rated power to obtain the current maximum frequency modulation power of each energy storage unit in the energy storage system.
  • the current power and rated power of each energy storage unit in the energy storage system are obtained through the control system of the energy storage system.
  • the running state includes a start-stop state, a discharge-allowed state and a charge-allowed state.
  • the PCS Power Conversion System, energy storage converter
  • the PCS starts, and in the case of a fault state, the PCS should be closed, and the start-stop status flag of the PCS is expressed as the following formula (9):
  • the discharge permission flag u 2,i and the charge permission flag u 3,i of the PCS of each energy storage unit are set respectively through the following formula (10) and formula (11 )express:
  • SOC max and SOC min are the upper and lower limits of the state of charge of each energy storage unit
  • SOC i is the state of charge of the i-th energy storage unit
  • u 2,i is the PCS of the i-th energy storage unit
  • the discharge permission flag, u 3, i is the charge permission flag of the PCS of the i-th energy storage unit.
  • the method for obtaining the frequency modulation power demand of each energy storage unit according to the frequency modulation power demand of the energy storage system, and the current maximum frequency modulation power, state of charge and operation state of each energy storage unit includes: according to the frequency modulation power of the energy storage system Power demand, as well as the current maximum frequency modulation power, state of charge and operation state of each energy storage unit, based on the allocation principle of the state of charge of each energy storage unit, allocate the frequency modulation power demand of the energy storage system, and obtain the energy storage unit’s FM power requirements.
  • the frequency modulation power demand of the energy storage system participating in a frequency modulation needs to be allocated to each energy storage unit, and the state of charge of each energy storage unit is consistent by monitoring the PCS operating status and SOC of each energy storage unit
  • the frequency modulation power demand ⁇ P ESS of each energy storage unit in response to frequency modulation is determined by the following formula, i can be expressed by the following formula (12):
  • the frequency modulation power requirements of each energy storage unit after obtaining the frequency modulation power requirements of each energy storage unit, it also includes: obtaining the current power and rated power of each energy storage unit; energy unit power constraints, and check the frequency modulation power requirements of each energy storage unit according to the power constraints of each energy storage unit; The frequency modulation power demand of the system, as well as the current maximum frequency modulation power, state of charge and modified operating state of each energy storage unit, based on the principle of consistent state of charge of each energy storage unit, redistribute the frequency modulation power demand of the energy storage system , and update the frequency modulation power demand of each energy storage unit according to the reallocation result.
  • the failure of the battery cluster of the energy storage unit will cause the maximum power of the energy storage unit to change. test.
  • p max,i represents the maximum power of the i-th energy storage unit in response to frequency modulation
  • p N represents the rated power of the energy storage unit
  • the power calibration value SOP i is obtained by the following formula (14):
  • the flag bit is updated, and the frequency modulation power demand of the energy storage system is allocated again in the above-mentioned manner until the power constraints of each energy storage unit are met, that is, as well as any of the conditions.
  • step 401 is executed: parameter initialization, that is, to define the monitoring period of the grid frequency, the frequency dead zone range, the upper and lower limits of primary frequency regulation, and the active power limiting coefficient.
  • step 402 obtain frequency modulation power demand
  • step 403 determine whether wind turbines are required to participate, that is, whether wind power system is required to curtail wind.
  • the maximum power of the system is the response to the frequency modulation power demand, and the remaining part is the frequency modulation power demand of the wind power system.
  • the frequency modulation power demand of each energy storage unit is its maximum power in response to frequency modulation.
  • step 406 and step 407 are executed in sequence: the frequency modulation power demand is all responded by the energy storage system, and the energy storage system is allocated according to the state of charge of each energy storage unit. Frequency modulation power demand, and perform step 408 to solve the power calibration value of each energy storage unit. The power demand is verified to obtain the frequency modulation power demand of each energy storage unit.
  • step 409 If the existing power verification value is not less than 1, it means that the frequency modulation power demand of the energy storage unit has not passed the verification, and it is necessary to perform step 409 to redistribute the frequency modulation power demand of each energy storage unit, and then perform step 410 to find out whether the shortage power is If it is 0, it ends when the default power is 0; otherwise, perform step 411 to solve the power verification value of each energy storage unit again, and repeat the above operation until the power verification values are all less than 1 or the default power is 0.
  • S5 Control each energy storage unit to perform a frequency modulation according to the frequency modulation power demand of each energy storage unit.
  • the method for controlling each energy storage unit to perform frequency modulation according to the frequency modulation power demand of each energy storage unit includes: obtaining the current power of each energy storage unit, and superimposing the current power of each energy storage unit with the frequency modulation power demand of each energy storage unit to obtain The frequency modulation power of each energy storage unit is controlled to operate with the frequency modulation power of each energy storage unit.
  • the frequency modulation power of each energy storage unit is obtained by superimposing the current power of each energy storage unit on the frequency modulation power demand of each energy storage unit.
  • Such a setting allows the energy storage system to retain the existing The operating power does not affect the current function of the energy storage unit.
  • the energy storage system is responding to peak shaving and valley filling. Under such a setting, the energy storage system can respond to peak shaving and valley filling on one side, and a frequency modulation on the other.
  • the primary frequency modulation coordinated control method of the wind storage system further includes: obtaining the frequency modulation power demand of the wind power system in the wind storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system; The frequency modulation power demand of the wind power system controls the wind power system to perform a frequency modulation.
  • the methods for obtaining the frequency modulation power demand of the wind power system in the wind storage system include: according to the energy storage system The maximum frequency modulation power of the system is allocated based on the minimum abandoned wind power of the wind power system in the wind storage system, and the frequency modulation power demand of the wind storage system is allocated.
  • the wind power system is allocated The frequency modulation power demand of the wind storage system is obtained to obtain the frequency modulation power demand of the wind power system in the wind storage system.
  • the method for controlling the wind power system to perform primary frequency modulation according to the frequency modulation power demand of the wind power system includes: obtaining the current power of the wind power system, superimposing the current power of the wind power system with the frequency modulation power demand of the wind power system, obtaining the frequency modulation power of the wind power system, and controlling the wind power system Run with the frequency modulation power of the wind power system.
  • the primary frequency modulation coordination control method of the disclosed wind storage system realizes the distribution of the frequency modulation power demand of the wind power system and the frequency modulation power demand of the energy storage system according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system,
  • the wind power system can maximize the supply of clean energy power.
  • the frequency modulation power demand of the energy storage system is obtained according to the frequency modulation power demand of the energy storage system, as well as the current maximum frequency modulation power, state of charge and operation status of each energy storage unit.
  • a primary frequency modulation coordinated control device for a wind storage system which can be configured to implement the above-mentioned primary frequency modulation coordinated control method for a wind storage system.
  • the frequency modulation coordination control device includes a first data acquisition module 51 , a first demand allocation module 52 , a second data acquisition module 53 , a second demand allocation module 54 and a first control module 55 .
  • the first data acquisition module 51 is configured to obtain the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system in the wind storage system;
  • the first demand distribution module 52 is configured to obtain the frequency modulation power demand of the wind storage system and the energy storage system
  • the maximum frequency modulation power is to obtain the frequency modulation power demand of the energy storage system;
  • the second data acquisition module 53 is configured to obtain the current maximum frequency modulation power, state of charge and operation state of each energy storage unit in the energy storage system;
  • the second demand allocation module 54 configures In order to obtain the frequency modulation power requirements of each energy storage unit according to the frequency modulation power requirements of the energy storage system, and the current maximum frequency modulation power, state of charge, and operating state of each energy storage unit;
  • the first control module 55 is configured to The frequency modulation power demand controls each energy storage unit to perform a frequency modulation.
  • the first data acquisition module 51 includes a wind storage demand acquisition module, and the wind storage demand acquisition module is configured to acquire the grid frequency and the grid rated frequency of the grid connection point of the wind storage system; In the case of the set frequency dead zone range, the frequency modulation power demand of the wind storage system is 0; otherwise, according to the frequency deviation between the grid frequency and the grid rated frequency, and the preset frequency modulation adaptive coefficient, the frequency modulation of the wind storage system is obtained power requirements.
  • the demand obtaining module of the wind storage system is further configured to obtain the state of charge and rated power of the energy storage system when the grid frequency is within a preset frequency dead zone range;
  • the state of charge and rated power of the energy storage system, as well as the preset self-recovery coefficient and the preset return state of charge range, as well as the grid frequency and frequency dead zone range, can obtain the return power of the energy storage system; obtain the energy storage unit’s State of charge, according to the return power of the energy storage system and the state of charge of each energy storage unit, the return power of each energy storage unit is obtained; according to the return power of each energy storage unit, each energy storage unit is controlled to perform energy storage return.
  • the demand acquisition module of the wind storage system is further configured to obtain the boundary value of the power grid withstand power change, and update the return power of the energy storage system to the return power of the energy storage system and the grid withstand power The smaller of the varying boundary values.
  • the preset frequency modulation adaptive coefficient includes several coefficient values, one coefficient value corresponds to a frequency deviation range, and the larger the coefficient value, the larger the boundary value of the corresponding frequency deviation range;
  • the demand acquisition module of the wind storage system includes a demand calculation module of the wind storage system, and the demand calculation module of the wind storage system is configured to, according to the frequency deviation range to which the frequency deviation between the grid frequency and the grid rated frequency belongs, from the preset frequency modulation adaptive coefficient The corresponding coefficient value is selected in , and the frequency modulation power demand of the wind storage system is obtained according to the frequency deviation between the grid frequency and the rated frequency of the grid and the selected coefficient value.
  • the first demand allocation module 52 includes an energy storage demand allocation module, and the energy storage demand allocation module is configured to minimize the curtailed wind power of the wind power system in the wind storage system according to the maximum frequency regulation power of the energy storage system According to the allocation principle, the frequency modulation power demand of the wind storage system is allocated, and when the frequency modulation power demand of the wind storage system is reduced power, the frequency modulation power demand of the wind power storage system is allocated to the wind power system, and the frequency modulation power demand of the energy storage system is obtained.
  • the second data acquisition module 53 includes a power acquisition module and a maximum frequency modulation power acquisition module, and the power acquisition module is configured to acquire the current power and rated power of each energy storage unit in the energy storage system; the maximum The frequency modulation power acquisition module is configured to obtain the current maximum frequency modulation power of each energy storage unit in the energy storage system according to the current power and rated power of each energy storage unit in the energy storage system.
  • the second demand allocation module 54 includes an energy storage unit demand module, and the energy storage unit demand module is configured to be based on the frequency modulation power demand of the energy storage system and the current maximum frequency modulation power of each energy storage unit , state of charge and operating state, and use the consistency of the state of charge of each energy storage unit as the power allocation principle to allocate the frequency modulation power demand of the energy storage system, and obtain the frequency modulation power demand of each energy storage unit.
  • the second demand allocation module 54 further includes an energy storage unit verification module configured to acquire the current power and rated power of each energy storage unit; according to the current power of each energy storage unit and rated power to obtain the power constraints of each energy storage unit, and check the frequency modulation power requirements of each energy storage unit according to the power constraints of each energy storage unit; According to the frequency modulation power demand of the energy storage system, as well as the current maximum frequency modulation power, state of charge and modified operation state of each energy storage unit, the power allocation principle is based on the consistency of state of charge of each energy storage unit. Redistribute the frequency modulation power requirements of the energy storage system, and update the frequency modulation power requirements of each energy storage unit according to the redistribution results.
  • the first control module 55 includes an energy storage unit control module, and the energy storage unit control module is configured to obtain the current power of each energy storage unit, and the current power of each energy storage unit is superimposed on the power of each energy storage unit. According to the frequency modulation power demand, the frequency modulation power of each energy storage unit is obtained, and each energy storage unit is controlled to operate with the frequency modulation power of each energy storage unit.
  • the wind storage system primary frequency modulation coordination control device further includes a third demand allocation module and a second control module; the third demand allocation module is configured to The maximum frequency modulation power obtains the frequency modulation power demand of the wind power system in the wind storage system; the second control module is configured to control the wind power system to perform a frequency modulation according to the frequency modulation power demand of the wind power system.
  • the third demand allocation module includes a wind power demand allocation module, and the wind power demand allocation module is configured to allocate according to the maximum frequency modulation power of the energy storage system and the minimum abandoned wind power of the wind power system in the wind storage system , allocate the frequency modulation power demand of the wind storage system, and in the case that the frequency modulation power demand of the wind storage system is reduced power, allocate the frequency modulation power demand of the wind storage system to the wind power system, and obtain the frequency modulation power demand of the wind power system in the wind storage system.
  • the second control module includes a wind power system control module
  • the wind power system control module is configured to obtain the current power of the wind power system, and the current power of the wind power system is superimposed on the frequency modulation power demand of the wind power system to obtain the frequency modulation power of the wind power system , to control the wind power system to run with the frequency modulation power of the wind power system.
  • a primary frequency modulation coordination control system for a wind storage system including a data collection device 61 , a communication device 62 and the aforementioned wind storage system primary frequency modulation coordination control device 63 ; the data collection device 61 and the communication device 62 are all connected with the primary frequency modulation coordination control equipment 63 of the wind storage system; when in use, the data acquisition device 61 is connected to the grid-connected point 66 of the wind storage system, the wind power system control unit 641 in the wind storage system, and the energy storage in the wind storage system The system control unit 651 is connected, the communication device 62 is connected to the wind power system control unit 641 and the PCS of each energy storage unit 6511 in the energy storage system 65; the data acquisition device 61 is configured to collect the grid frequency of the grid connection point of the wind storage system, and The operating data of the wind power system 64 and the energy storage system 65 are sent to the primary frequency modulation coordination control device 63 of the wind storage system; the
  • the primary frequency modulation coordination control device 63 of the wind storage system is arranged between the wind storage system and the grid, through the data acquisition device 61, such as PT (Potential Transformer, PT) or CT (Current Transformer, current transformer),
  • the voltage of the grid-connected point 66 of the wind storage system is collected directly, and the system frequency and voltage are calculated.
  • the commands come from grid dispatching or on-site devices, Realize millisecond-level communication.
  • the communication with the PCS of the energy storage unit 6511 and the wind turbine 6411EMP/VMP Through the communication with the PCS of the energy storage unit 6511 and the wind turbine 6411EMP/VMP, the interaction of the real-time operation information of the wind storage system is realized, and the real-time data received are written into the real-time database of the system through the local area network point-to-point communication.
  • the communication device 62 the issued frequency modulation power demand of the energy storage unit 6511 is delivered to the PCS of each energy storage unit 6511 through the fast channel, so as to realize the regulation and control function of the energy storage system 65.
  • a computer device in yet another embodiment of the present disclosure, includes a processor and a memory, the memory is configured to store a computer program, the computer program includes program instructions, and the processor is configured to execute the Program instructions stored on a computer storage medium.
  • the processor may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable Gate array (Field-Programmable GateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, are suitable for implementing one or more instructions, and can It is suitable for loading and executing one or more instructions in the computer storage medium to realize the corresponding method flow or corresponding function; the processor described in the embodiment of the present disclosure can be used for the operation of the primary frequency modulation coordinated control method of the wind storage system.
  • CPU Central Processing Unit
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable GateArray
  • FPGA Field-Programmable GateArray
  • the above-mentioned primary frequency modulation coordinated control method of the wind storage system is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable memory medium.
  • the essence of the technical solutions of the embodiments of the present disclosure or the part that contributes to the related technologies can be embodied in the form of software products, the computer software products are stored in a storage medium, and include several instructions to make The electronic device executes all or part of the methods described in the various embodiments of the present disclosure.
  • the aforementioned storage medium includes: various media that can store program codes such as U disk, mobile hard disk, read-only memory (Read Only Memory, ROM), magnetic disk or optical disk.
  • embodiments of the present disclosure are not limited to any specific combination of hardware and software.
  • the present disclosure also provides a storage medium, which may be a computer-readable storage medium (Memory).
  • the computer-readable storage medium is a memory device in a computer device configured to store programs and data. It can be understood that the computer-readable storage medium here may include a built-in storage medium in the computer device, and of course may also include an extended storage medium supported by the computer device.
  • the computer-readable storage medium provides storage space, and the storage space stores the operating system of the terminal.
  • one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions may be one or more computer programs (including program codes).
  • the computer-readable storage medium here may be a high-speed RAM memory (Random Access Memory, random access memory), or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory.
  • RAM Random Access Memory
  • non-volatile memory non-volatile memory
  • One or more instructions stored in the computer-readable storage medium can be loaded and executed by the processor, so as to realize the corresponding steps of the primary frequency modulation coordinated control method of the wind storage system in the above-mentioned embodiments.
  • An embodiment of the present disclosure also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables the computer to execute any wind method described in the above-mentioned method embodiments. Part or all of the steps of the primary frequency modulation coordinated control method of the storage system.
  • the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.
  • the frequency modulation power demand of the energy storage system can be determined according to the frequency modulation power demand of the wind storage system and the maximum frequency modulation power of the energy storage system.
  • the frequency modulation power demand of the energy storage system and the energy storage unit According to the current maximum frequency modulation power, state of charge and operation state, the frequency modulation power demand of each energy storage unit is obtained.
  • the frequency modulation of each energy storage unit in the energy storage system is realized.
  • Reasonable allocation of power demand improves the consistency and controllability of each energy storage unit, thereby improving the ability of the entire energy storage system to respond to primary frequency modulation.

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Abstract

本公开属于电气工程领域,公开了一种风储系统一次调频协调控制方法、系统、设备及存储介质,获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率;根据风储系统的调频功率需求及储能系统最大调频功率,得到储能系统的调频功率需求;获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态;根据储能系统的调频功率需求,及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求;根据各储能单元的调频功率需求控制各储能单元进行一次调频,提高各储能单元的一致性和可控性,提升整个储能系统响应一次调频的能力。

Description

风储系统一次调频协调控制方法、系统、设备及存储介质
相关申请的交叉引用
本公开要求在2021年9月13日提交中国专利局、申请号为202111068427.1、申请名称为“风储系统一次调频协调控制方法、系统、设备及存储介质”的中国专利申请的优先权,其全部内容通过引用结合在本公开中。
技术领域
本公开属于电气工程领域,涉及一种风储系统一次调频协调控制方法、系统、设备及存储介质。
背景技术
风电以其蕴藏丰富,可再生、分布广、无污染等特性,受到世界范围内的广泛关注,已成为电力供应的重要组成部分。在高比例新能源电力系统中,新能源大量接入导致系统频率特性劣化,经常需要频率调节。风电机组一般按照最大风能捕获控制,在一次调频主动支撑时,多采用预留容量的方式,经济性不佳。
针对上述问题,目前相关技术一般通过风电系统结合储能系统的方式,形成风储系统来实现频率调节。比如,专利申请CN108011381A,公开了一种风储一体化系统调频控制方法,该方法在风电机组变流器的直流母线上并联储能装置,将风电机组和储能装置作为一个整体向系统供电,通过对储能系统有功的合理控制,即控制储能装置功率在实现风电机组最大功率追踪的同时使机组具备传统同步发电机的惯量响应特性,实现风储一体化系统具有与传统同步发电机类似惯量响应特性,并主动参与电网一次调频。专利申请CN112600225A,公开了一种用于风储系统一次调频的控制方法及系统,该方法包括底层双馈异步风力发电机(Double Fed Induction Generator,DFIG)矢量控制和储能系统(Energy Storage System,ESS)双闭环控制, 上层功率一致性控制和荷电状态(State Of Charge,SOC)一致性控制。底层控制确保风机和储能系统的正常运行,上层控制调节风机和储能系统的功率分配:基于功率一致性控制确保储能设备能够根据其不同的容量实时调节储能调频功率输出;基于SOC一致性协议对DFIG网侧变流器参考功率进行调整,使得所有储能设备可以在同时充放电的前提下根据SOC调整其输出。
但是,上述风储系统在进行频率调节时,均将储能系统作为一个整体进行调频功率响应,且仅用来实现调频功能,并且随着大容量多机并联集中式储能系统的发展趋势,储能系统内部往往包括多个储能单元,各储能单元的调频功率难以合理分配,使得储能系统内各储能单元间一致性变差,进而导致整个风储系统的调频性能较差。
发明内容
本公开实施例提供一种风储系统一次调频协调控制方法、系统、设备及存储介质。
第一方面,本公开提供一种风储系统一次调频协调控制方法,包括以下步骤:
获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率;
所述获取风储系统的调频功率需求的方法包括:获取风储系统并网点的电网频率以及电网额定频率;在电网频率在预设的频率死区范围的情况下,风储系统的调频功率需求为0;否则,根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求;
所述在电网频率在预设的频率死区范围的情况下,还包括:获取储能系统的荷电状态和额定功率;根据储能系统的荷电状态和额定功率,以及预设的自恢复系数和预设的回归荷电状态范围,以及电网频率和频率死区范围,得到储能系统的回归功率;获取各储能单元的荷电状态,根据储能 系统的回归功率以及各储能单元的荷电状态,得到各储能单元的回归功率;根据各储能单元的回归功率,控制各储能单元进行储能回归;
根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求;
获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态;
根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求;
根据各储能单元的调频功率需求控制各储能单元进行一次调频。
本公开风储系统一次调频协调控制方法在本公开的一些实施例中的改进在于:
所述得到储能系统的回归功率后,还包括:获取电网承受功率变化的边界值,并将储能系统的回归功率更新为储能系统的回归功率与电网承受功率变化的边界值中的较小值。
所述预设的调频自适应系数中包括若干系数值,一系数值对应一频率偏差范围,且系数值越大,对应的频率偏差范围的边界值越大;所述根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求的方法包括:根据电网频率与电网额定频率之间的频率偏差所属的频率偏差范围,从预设的调频自适应系数中选取对应的系数值,根据电网频率与电网额定频率之间的频率偏差以及选取的系数值,得到风储系统的调频功率需求。
所述根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求的方法包括:根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到储能系统的调频功率需求。
所述获取储能系统内各储能单元的当前最大调频功率的方法包括:获取储能系统内各储能单元的当前功率以及额定功率;根据储能系统内各储能单元的当前功率以及额定功率,得到储能系统内各储能单元的当前最大调频功率。
所述运行状态包括启停状态、放电允许状态和充电允许状态。
所述根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求的方法包括:根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,以各储能单元的荷电状态一致性为功率分配原则,分配储能系统的调频功率需求,得到各储能单元的调频功率需求。
所述得到各储能单元的调频功率需求后,还包括:获取各储能单元当前功率以及额定功率;根据各储能单元当前功率以及额定功率,得到各储能单元功率约束,并根据各储能单元功率约束检核各储能单元的调频功率需求;在未通过校核的情况下,修改未通过校核的储能单元的运行状态,并根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及修改后的运行状态,以各储能单元的荷电状态一致性为功率分配原则,重新分配储能系统的调频功率需求,并根据重新分配结果更新各储能单元的调频功率需求。
所述根据各储能单元的调频功率需求控制各储能单元进行一次调频的方法包括:获取各储能单元当前功率,各储能单元当前功率叠加各储能单元的调频功率需求,得到各储能单元调频功率,控制各储能单元以各储能单元调频功率运行。
还包括:根据风储系统的调频功率需求以及储能系统最大调频功率,得到风储系统内风电系统的调频功率需求;根据风电系统的调频功率需求控制风电系统进行一次调频。
所述根据风储系统的调频功率需求以及储能系统最大调频功率,得到 风储系统内风电系统的调频功率需求的方法包括:根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到风储系统内风电系统的调频功率需求。
所述根据风电系统的调频功率需求控制风电系统进行一次调频的方法包括:获取风电系统当前功率,风电系统当前功率叠加风电系统的调频功率需求,得到风电系统调频功率,控制风电系统以风电系统调频功率运行。
第二方面,本公开提供一种风储系统一次调频协调控制设备,包括:
第一数据获取模块,配置为获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率;
第一需求分配模块,配置为根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求;
第二数据获取模块,配置为获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态;
第二需求分配模块,配置为根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求;
第一控制模块,配置为根据各储能单元的调频功率需求控制各储能单元进行一次调频。
所述第一数据获取模块包括风储需求获取模块,所述风储需求获取模块配置为获取风储系统并网点的电网频率以及电网额定频率;在电网频率在预设的频率死区范围的情况下,风储系统的调频功率需求为0;否则,根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求。
所述风储系统需求获取模块还配置为,在电网频率在预设的频率死区 范围的情况下,获取储能系统的荷电状态和额定功率;根据储能系统的荷电状态和额定功率,以及预设的自恢复系数和预设的回归荷电状态范围,以及电网频率和频率死区范围,得到储能系统的回归功率;获取各储能单元的荷电状态,根据储能系统的回归功率以及各储能单元的荷电状态,得到各储能单元的回归功率;根据各储能单元的回归功率,控制各储能单元进行储能回归。
第三方面,本公开提供一种风储系统一次调频协调控制系统,包括数据采集装置、通讯装置以及上述的风储系统一次调频协调控制设备;
数据采集装置和通讯装置均与风储系统一次调频协调控制设备连接;在使用状态的情况下,数据采集装置与风储系统的并网点、风储系统内风电系统控制单元以及风储系统内储能系统控制单元均连接,通讯装置与风电系统控制单元以及储能系统内各储能单元的储能变流器PCS均连接;
数据采集装置配置为采集风储系统的并网点的电网频率,以及风电系统和储能系统的运行数据,并发送至风储系统一次调频协调控制设备;
通讯装置配置为风储系统一次调频协调控制设备与风电系统控制单元以及各储能单元的PCS之间的数据交互。
第四方面,本公开提供一种计算机设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现上述风储系统一次调频协调控制方法的步骤。
第五方面,本公开提供一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序被处理器执行时实现上述风储系统一次调频协调控制方法的步骤。
与相关技术相比,本公开具有以下有益效果:
本公开风储系统一次调频协调控制方法,根据风储系统的调频功率需求以及储能系统最大调频功率,实现储能系统的调频功率需求的确定,同时,根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、 荷电状态及运行状态,得到各储能单元的调频功率需求,通过综合考虑当前最大调频功率、荷电状态及运行状态,实现了储能系统内各储能单元的调频功率需求的合理分配,提高了各储能单元的一致性和可控性,进而提升了整个储能系统响应一次调频的能力。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性和解释性的,而非限制本公开实施例。
根据下面参考附图对示例性实施例的详细说明,本公开的其它特征及方面将变得清楚。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本公开的实施例,并与说明书一起用于解释本公开的原理。
图1为本公开实施例提供的一种风储系统一次调频协调控制方法流程框图;
图2为本公开实施例提供的一种风电系统参与一次调频的功率-频率响应曲线图;
图3为本公开实施例提供的一种风储协调控制调频自适应系数曲线图;
图4为本公开实施例提供的另一种的风储一次调频控制协调控制方法流程图;
图5为本公开实施例提供的一种风储系统一次调频协调控制设备结构框图;
图6为本公开实施例提供的一种风储系统一次调频协调控制系统结构框图。
通过上述附图,已示出本公开明确的实施例,后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本公开构思的范围,而是通过参考特定实施例为本领域技术人员说明本公开的概念。
具体实施方式
为了使本技术领域的人员更好地理解本公开方案,下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本公开一部分的实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本公开保护的范围。
在本公开实施例中使用的术语是仅仅出于描述特定实施例的目的,而非旨在限制本公开。在本公开实施例中所使用的单数形式的“一种”和“该”也旨在包括多数形式,除非上下文清楚地表示其他含义。
应当理解,本文中使用的术语“和/或”仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
取决于语境,如在此所使用的词语“如果”、“若”可以被解释成为“在……时”或“当……时”或“响应于确定”或“响应于检测”。类似地,取决于语境,短语“如果确定”或“如果检测(陈述的条件或事件)”可以被解释成为“当确定时”或“响应于确定”或“当检测(陈述的条件或事件)时”或“响应于检测(陈述的条件或事件)”。
需要说明的是,本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本公开的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
下面结合附图对本公开做详细描述:
参见图1,本公开一实施例中,为了提高风储系统的一次调频过程中,风储协调性以及多机并联储能电站的功率分配的合理性,提供一种风储系统一次调频协调控制方法,利用储能技术协同风电出力,响应电网一次调频需求,提高风储联合运行能力。该风储系统一次调频协调控制方法包括以下步骤。
S1:获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率。
其中,所述获取风储系统的调频功率需求的方法包括:S11:获取风储系统并网点的电网频率以及电网额定频率;S12:在电网频率在预设的频率死区范围的情况下,风储系统的调频功率需求为0;S13:否则,根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求。
在一些实施例中,通过电压互感器及电流互感器,直接采集风储系统并网点的频率,能够对电网频率的变化做出快速判断。设定对电网频率的监测周期为T,每隔T进行一次电网频率的采集。同时,参见图2,设定电网频率调节的频率死区范围为[f min,f max],根据相关标准,频率波动死区一般为±0.05;对于风储系统,还应当设置一次调频的上下限值,在电网频率超过设定的限值范围的情况下,储能系统将不再响应一次调频,同时,对于风储系统响应一次调频,还应定义调频功率需求△P f与额定功率P N的比值为有功功率限幅系数β,即:
Figure PCTCN2022118531-appb-000001
限幅系数根据实际情况设定,定义β∈[β min,β max],根据行业标准《DLT 1870-2018电力系统网源协调技术规范》中的规定,β最大值不低于10%,例如设定为1%~20%,即调节的有功功率变化量△P f的绝对值与额定功率的占比在1%~20%内才会输出调频功率。
因此,为了防止不必要的调频响应,在电网频率在预设的频率死区范围的情况下,认为当前不需要进行调频,即风储系统的调频功率需求为0。在电网频率在预设的频率死区范围之外的情况下,根据获取的电网频率以及电网额定频率,得到电网频率与电网额定频率之间的频率偏差,根据该频率偏差以及预设的调频自适应系数,得到风储系统的调频功率需求,在一些实施例中,通过如下公式(1)得到风储系统的调频功率需求△P f
Figure PCTCN2022118531-appb-000002
其中,m为预设的调频自适应系数;f d表示频率死区范围边界值,即:f max和f min,分别表示调频死区的上下边界;f表示电网频率。
在本公开的一些实施例中,参见图3,所述预设的调频自适应系数中包括若干系数值,一系数值对应一频率偏差范围,且系数值越大,对应的频率偏差范围的边界值越大;所述根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求的方法包括:根据电网频率与电网额定频率之间的频率偏差所属的频率偏差范围,从预设的调频自适应系数中选取对应的系数值,根据电网频率与电网额定频率之间的频率偏差以及选取的系数值,得到风储系统的调频功率需求。本实施例中,设置两个系数值,以f 1和f 2为区分点,在电网频率靠近频率死区范围的情况下,该调频自适应系数的系数值增大,起到加速频率调节的作用,该调频自适应系数可根据实际情况调整,f m、f n分别表示调频的上下限值,当电网频率超出限值,风储系统也不再增加调频功率。
在本公开的一些实施例中,为了使得储能系统中各储能单元具有较好的电网调频响应,在不需要储能系统进行调频的情况下,将各储能单元的SOC恢复到基准值SOC b,称为储能SOC自回归。因此,在电网频率在预设的频率死区范围的情况下,还包括:S14:获取储能系统的荷电状态和额 定功率;S15:根据储能系统的荷电状态和额定功率,以及预设的自恢复系数和预设的回归荷电状态范围,以及电网频率和频率死区范围,电网频率包括电网实际频率和电网额定频率,得到储能系统的回归功率;S16:获取各储能单元的荷电状态,根据储能系统的回归功率以及各储能单元的荷电状态,得到各储能单元的回归功率,S17:根据各储能单元的回归功率控制各储能单元进行储能回归,即SOC自回归。本实施例中,将储能系统的回归功率作为风储系统的调频功率需求,由此,通过如下公式(2)更新风储系统的调频功率需求:
Figure PCTCN2022118531-appb-000003
其中,△P adj为储能系统的回归功率。
在一些实施例中,△P adj根据储能系统SOC确定,首先对储能系统的SOC进行划分,划分为依次增大的SOC min,SOC l,SOC b,SOC h及SOC max,在储能系统SOC低于SOC l或者高于SOC h的情况下,需要以SOC b为基准进行SOC自恢复调节,储能系统回归功率△P adj通过如下公式(3)表示为:
Figure PCTCN2022118531-appb-000004
其中,α是自恢复系数,可根据实际情况设定;P ESS,N是储能系统的额定功率。
在本公开的一些实施例中,在进行储能系统的SOC回归调节的情况下,为降低储能系统SOC自回归过程中充放电行为对并网点的电网频率造成的较大影响,即不能将电网频率影响至波动到频率死区范围之外,因此,需要考虑电网能够承受频率波动的功率变化边界值,包括频率上升的功率变化边界值以及频率下降的功率变化边界值。
在一些实施例中,根据电网频率由如下公式(4)确定电网承受频率下降的功率变化边界值
Figure PCTCN2022118531-appb-000005
Figure PCTCN2022118531-appb-000006
其中,δ%为一次调频的调差率;f N为电网额定频率;f为电网实际频率。
根据电网频率,由如下公式(5)确定电网承受频率上升的功率变化边界值
Figure PCTCN2022118531-appb-000007
Figure PCTCN2022118531-appb-000008
同时,回归功率需要调整为电网承受频率波动的功率变化边界值和当前的回归功率中的较小值,即:
Figure PCTCN2022118531-appb-000009
如上公式(6)表示,若当前的回归功率相比电网承受频率波动的功率变化边界值较小,则调整后的回归功率为当前的回归功率。若当前的回归功率相比电网承受频率波动的功率变化边界值较大,则调整后的回归功率为电网承受频率波动的功率变化边界值,那么,根据储能系统自回归功率,计算各储能单元的回归功率的方法通过如下公式(7)表示为:
Figure PCTCN2022118531-appb-000010
其中,△p adj,i表示第i个储能单元的自回归功率,SOC i表示第i个储能单元的荷电状态。
S2:根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求。
所述根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求的方法包括:根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到储能系统的调频功率需求。
本实施例中,以减少弃风为目标,计算风储系统的调频功率需求的分配结果。由于风电机组大都按照最大风能捕获控制,风电机组常采用最大功率点跟踪(MPPT)控制方式,因此,不考虑风电机组响应频率下降的情况,且只有在各储能单元的SOC达到最大值或者储能系统响应调频功率达到最大值仍不满足系统调频功率需求的情况下,才考虑风机弃风。储能系统响应一次调频功率△P ESS,f需要满足如下公式(8):
Figure PCTCN2022118531-appb-000011
其中,△P w,f表示风电系统响应一次调频的弃风功率。
需要判断是否需要风机弃风响应一次调频,以下说明△P w,f的计算方法:
(1)在电网频率超过频率死区范围的边界的情况下,即f>f max的情况下,需要风储系统降功率。若储能系统不能充电或者当前可用充电功率△P ESS不能完全满足风储系统的调频功率需求,即SOC ESS=SOC max或|ΔP ESS|<|ΔP f|,则需要风电系统弃风,此时△P w,f=△P f-△P ESS,其中,SOC ESS表示储能系统的荷电状态。
(2)在储能系统可以完全满足一次调频功率需求,即|ΔP ESS|≥|ΔP f|且SOC ESS<SOC max的情况下,不需要风电系统参与调频,△P w,f=0。
(3)在电网频率低于f min需要风储系统增发功率的情况下,风电系统的风机由于处于最大功率跟踪模式,不具备响应一次调频的能力,△P w,f=0。
S3:获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态。
其中,所述获取储能系统内各储能单元的当前最大调频功率的方法包括:获取储能系统内各储能单元的当前功率以及额定功率;根据储能系统内各储能单元的当前功率以及额定功率,得到储能系统内各储能单元的当前最大调频功率。
在一些实施例中,通过储能系统的控制系统,获取储能系统内各储能单元的当前功率以及额定功率。
其中,所述运行状态包括启停状态、放电允许状态和充电允许状态。本实施例中,以各储能单元的PCS(Power Conversion System,储能变流器)进行运行状态的说明,建立每个储能单元的PCS的启停状态的0-1表示,在允许启动的情况下,PCS启动,而在发生故障状态的情况下,应当关闭该PCS,PCS的启停状态标志位表示为如下公式(9):
Figure PCTCN2022118531-appb-000012
为了保护每个储能单元不过充、不过放,设置每个储能单元的PCS的放电允许标志位u 2,i和充电允许标志位u 3,i分别通过如下公式(10)和公式(11)表示:
Figure PCTCN2022118531-appb-000013
Figure PCTCN2022118531-appb-000014
其中,SOC max、SOC min分别为每个储能单元的荷电状态的上下限制,SOC i为第i个储能单元的荷电状态,u 2,i为第i个储能单元的PCS的放电允许标志位,u 3,i为第i个储能单元的PCS的充电允许标志位。
S4:根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求。
其中,所述根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求的方法包括:根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,以各储能单元的荷电状态一致为分配原则,分配储能系统的调频功率需求,得到各储能单元的调频功率需求。
在一些实施例中,储能系统参与一次调频的调频功率需求需要分配给各储能单元,通过监测各储能单元的PCS的运行状态和SOC的大小,以各储能单元的荷电状态一致为分配原则,通过下式确定各储能单元响应调频的调频功率需求△P ESS,i可以通过如下公式(12)表示:
Figure PCTCN2022118531-appb-000015
在本公开的一些实施例中,所述得到各储能单元的调频功率需求后,还包括:获取各储能单元当前功率以及额定功率;根据各储能单元当前功率以及额定功率,得到各储能单元功率约束,并根据各储能单元功率约束检核各储能单元的调频功率需求;在未通过校核的情况下,修改未通过校核的储能单元的运行状态,并根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及修改后的运行状态,以各储能单元的荷电状态一致为分配原则,重新分配储能系统的调频功率需求,并根据重新分配结果更新各储能单元的调频功率需求。
在一些实施例中,由于实际运行过程中各储能单元的运行状态存在差异,储能单元电池簇故障会导致储能单元的最大功率发生改变,因此对储能单元的调频功率需求进行功率校验。
首先,根据各储能单元参与调频前的初始功率设置如下公式(13)的功率约束:
0≤|p i|≤p max,i,p max,i=p N-|P 0,i|     公式(13);
其中,p max,i表示第i个储能单元响应调频的最大功率,p N表示储能单元的额定功率。
通过如下公式(14)得到功率校验值SOP i
Figure PCTCN2022118531-appb-000016
即,储能单元的调频功率需求达到能单元响应调频的最大功率的情况下,SOP i=1,否则SOP i=0。
在p ESS,i=0的情况下,该储能单元可能存在故障,应当对其启停标志位置零。通过如下公式(15)计算缺额功率:
Figure PCTCN2022118531-appb-000017
在ΔP' ESS≠0的情况下更新标志位,并以上述方式再次进行储能系统的调频功率需求的分配,直至满足各储能单元功率约束,即满足
Figure PCTCN2022118531-appb-000018
以及
Figure PCTCN2022118531-appb-000019
中任意一个条件。
参见图4,示出了S1~S4的一个简略过程,首先是执行步骤401:参数初始化,即定义电网频率的监测周期、频率死区范围、一次调频的上下限值以及有功功率限幅系数。然后执行步骤402:获取调频功率需求,并执行步骤403:判断是否需要风机参与,即是否需要风电系统进行弃风,在需要风机参与的情况下,依次执行步骤404和步骤405:首先将储能系统的最大功率作为调频功率需求的响应,然后剩余部分为风电系统调频功率需求,这样的话,每个储能单元的调频功率需求就是其响应调频的最大功率。在不需要风机参与的情况下,依次执行步骤406和步骤407:调频功率需求全部由储能系统响应,储能系统按照各储能单元的荷电状态一致为分配原则,得到各储能单元的调频功率需求,并执行步骤408求解各储能单元的功率 校验值,在功率校验值均小于1的情况下,即功率校验值均等于0的情况下,说明各储能单元的调频功率需求通过校验,得到各储能单元的调频功率需求。在存在功率校验值不小于1的情况下,说明存在储能单元的调频功率需求未通过校验,需要执行步骤409重新分配各储能单元的调频功率需求,然后执行步骤410求解缺额功率是否为0,在缺额功率为0的情况下结束,否则,执行步骤411再次求解各储能单元的功率校验值,并重复上述操作,直至功率校验值均小于1或缺额功率为0。
S5:根据各储能单元的调频功率需求控制各储能单元进行一次调频。
其中,所述根据各储能单元的调频功率需求控制各储能单元进行一次调频的方法包括:获取各储能单元当前功率,各储能单元当前功率叠加各储能单元的调频功率需求,得到各储能单元调频功率,控制各储能单元以各储能单元调频功率运行。
在一些实施例中,各储能单元调频功率由各储能单元当前功率叠加各储能单元的调频功率需求得到,这样的设置,使得储能系统在响应一次调频的情况下,保留现有的运行功率,不影响储能单元当前的作用,比如,储能系统正在响应削峰填谷,那么在这样的设置下,储能系统能够一边响应削峰填谷,另一边响应一次调频。
在本公开的一些实施例中,该风储系统一次调频协调控制方法还包括:根据风储系统的调频功率需求以及储能系统最大调频功率,得到风储系统内风电系统的调频功率需求;根据风电系统的调频功率需求控制风电系统进行一次调频。
参见上述S2中的风储系统的调频功率需求的分配过程,根据风储系统的调频功率需求以及储能系统最大调频功率,得到风储系统内风电系统的调频功率需求的方法包括:根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的 调频功率需求,得到风储系统内风电系统的调频功率需求。
在一些实施例中,根据风电系统的调频功率需求控制风电系统进行一次调频的方法包括:获取风电系统当前功率,风电系统当前功率叠加风电系统的调频功率需求,得到风电系统调频功率,控制风电系统以风电系统调频功率运行。
综上所述,本公开风储系统一次调频协调控制方法,根据风储系统的调频功率需求以及储能系统最大调频功率,实现风电系统的调频功率需求以及储能系统的调频功率需求的分配,使得风电系统能够最大化提供清洁能源功率,同时,根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求,通过综合考虑当前最大调频功率、荷电状态及运行状态,实现了储能系统内各储能单元的调频功率需求的合理分配,提高各储能单元的一致性和可控性,进而提升整个储能系统响应一次调频的能力。
下述为本公开的装置实施例,可以用于执行本公开方法实施例。与上述方法实施例的描述是类似的,具有同方法实施例相似的有益效果。对于装置实施例中未纰漏的细节,请参照本公开方法实施例的描述而理解。
参见图5,本公开再一实施例中,提供一种风储系统一次调频协调控制设备,能够配置为实现上述的风储系统一次调频协调控制方法,在一些实施例中,该风储系统一次调频协调控制设备包括第一数据获取模块51、第一需求分配模块52、第二数据获取模块53、第二需求分配模块54以及第一控制模块55。
其中,第一数据获取模块51配置为获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率;第一需求分配模块52配置为根据风储系统的调频功率需求及储能系统最大调频功率,得到储能系统的调频功率需求;第二数据获取模块53配置为获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态;第二需求分配模块54配置为根据储能系 统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求;第一控制模块55配置为根据各储能单元的调频功率需求控制各储能单元进行一次调频。
在本公开的一些实施例中,所述第一数据获取模块51包括风储需求获取模块,风储需求获取模块配置为获取风储系统并网点的电网频率以及电网额定频率;在电网频率在预设的频率死区范围的情况下,风储系统的调频功率需求为0;否则,根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求。
在本公开的一些实施例中,所述风储系统需求获取模块还配置为,在电网频率在预设的频率死区范围的情况下,获取储能系统的荷电状态和额定功率;根据储能系统的荷电状态和额定功率,以及预设的自恢复系数和预设的回归荷电状态范围,以及电网频率和频率死区范围,得到储能系统的回归功率;获取各储能单元的荷电状态,根据储能系统的回归功率以及各储能单元的荷电状态,得到各储能单元的回归功率;根据各储能单元的回归功率,控制各储能单元进行储能回归。
在本公开的一些实施例中,所述风储系统需求获取模块还配置为,获取电网承受功率变化的边界值,并将储能系统的回归功率更新为储能系统的回归功率与电网承受功率变化的边界值中的较小值。
在本公开的一些实施例中,所述预设的调频自适应系数中包括若干系数值,一系数值对应一频率偏差范围,且系数值越大,对应的频率偏差范围的边界值越大;所述风储系统需求获取模块包括风储系统需求计算模块,风储系统需求计算模块配置为根据电网频率与电网额定频率之间的频率偏差所属的频率偏差范围,从预设的调频自适应系数中选取对应的系数值,根据电网频率与电网额定频率之间的频率偏差以及选取的系数值,得到风储系统的调频功率需求。
在本公开的一些实施例中,所述第一需求分配模块52包括储能需求分 配模块,储能需求分配模块配置为根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到储能系统的调频功率需求。
在本公开的一些实施例中,所述第二数据获取模块53包括功率获取模块和最大调频功率获取模块,功率获取模块配置为获取储能系统内各储能单元的当前功率以及额定功率;最大调频功率获取模块配置为根据储能系统内各储能单元的当前功率以及额定功率,得到储能系统内各储能单元的当前最大调频功率。
在本公开的一些实施例中,所述第二需求分配模块54包括储能单元需求模块,储能单元需求模块配置为根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,以各储能单元的荷电状态一致性为功率分配原则,分配储能系统的调频功率需求,得到各储能单元的调频功率需求。
在本公开的一些实施例中,第二需求分配模块54还包括储能单元校验模块,储能单元校验模块配置为获取各储能单元当前功率以及额定功率;根据各储能单元当前功率以及额定功率,得到各储能单元功率约束,并根据各储能单元功率约束检核各储能单元的调频功率需求;在未通过校核的情况下,修改未通过校核的储能单元的运行状态,并根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及修改后的运行状态,以各储能单元的荷电状态一致性为功率分配原则,重新分配储能系统的调频功率需求,并根据重新分配结果更新各储能单元的调频功率需求。
在本公开的一些实施例中,所述第一控制模块55包括储能单元控制模块,储能单元控制模块配置为获取各储能单元当前功率,各储能单元当前功率叠加各储能单元的调频功率需求,得到各储能单元调频功率,控制各 储能单元以各储能单元调频功率运行。
在本公开的一些实施例中,该风储系统一次调频协调控制设备还包括第三需求分配模块和第二控制模块;第三需求分配模块配置为根据风储系统的调频功率需求以及储能系统最大调频功率,得到风储系统内风电系统的调频功率需求;第二控制模块配置为根据风电系统的调频功率需求控制风电系统进行一次调频。
在本公开的一些实施例中,所述第三需求分配模块包括风电需求分配模块,风电需求分配模块配置为根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到风储系统内风电系统的调频功率需求。
在本公开的一些实施例中,所述第二控制模块包括风电系统控制模块,风电系统控制模块配置为获取风电系统当前功率,风电系统当前功率叠加风电系统的调频功率需求,得到风电系统调频功率,控制风电系统以风电系统调频功率运行。
参见图6,本公开再一实施例中,提供一种风储系统一次调频协调控制系统,包括数据采集装置61、通讯装置62以及上述的风储系统一次调频协调控制设备63;数据采集装置61和通讯装置62均与风储系统一次调频协调控制设备63连接;使用状态时,数据采集装置61与风储系统的并网点66、风储系统内风电系统控制单元641以及风储系统内储能系统控制单元651均连接,通讯装置62与风电系统控制单元641以及储能系统65内各储能单元6511的PCS均连接;数据采集装置61配置为采集风储系统的并网点的电网频率,以及风电系统64和储能系统65的运行数据,并发送至风储系统一次调频协调控制设备63;通讯装置62配置为风储系统一次调频协调控制设备63与风电系统控制单元641以及各储能单元6511的PCS之间的数据交互。
在一些实施例中,风储系统一次调频协调控制设备63布置于风储系统与电网之间,通过数据采集装置61,如PT(Potential Transformer,PT)或CT(Current Transformer,电流互感器),直接采集风储系统的并网点66的电压,进行系统频率和电压计算。对下通过通讯装置62,接入与储能系统65内各储能单元6511的PCS互联的快速控制网络,获取各PCS当前执行的充放电功率指令,该指令来自于电网调度或者就地装置,实现毫秒级通信。通过与储能单元6511的PCS及风机6411EMP/VMP的通信,实现对风储系统实时运行信息的交互,将其接收到的实时数据通过局域网点对点通信方式写入到系统的实时数据库中。利用通讯装置62,将下发的储能单元6511的调频功率需求,通过快速通道下发给各储能单元6511的PCS,实现对储能系统65的调控功能。
本公开再一个实施例中,提供了一种计算机设备,该计算机设备包括处理器以及存储器,所述存储器配置为存储计算机程序,所述计算机程序包括程序指令,所述处理器配置为执行所述计算机存储介质存储的程序指令。处理器可能是中央处理单元(Central Processing Unit,CPU),还可以是其他通用处理器、数字信号处理器(Digital Signal Processor、DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现场可编程门阵列(Field-Programmable GateArray,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等,其是终端的计算核心以及控制核心,其适于实现一条或一条以上指令,可以适于加载并执行计算机存储介质内一条或一条以上指令从而实现相应方法流程或相应功能;本公开实施例所述的处理器可以用于风储系统一次调频协调控制方法的操作。
需要说明的是,本公开实施例中,如果以软件功能模块的形式实现上述的风储系统一次调频协调控制方法,并作为独立的产品销售或使用时,也可以存储在一个计算机可读取存储介质中。基于这样的理解,本公开实施例的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品 的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得电子设备执行本公开各个实施例所述方法的全部或部分。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read Only Memory,ROM)、磁碟或者光盘等各种可以存储程序代码的介质。这样,本公开实施例不限制于任何特定的硬件和软件结合。
对应地,本公开再一个实施例中,本公开还提供了一种存储介质,可以为计算机可读存储介质(Memory),所述计算机可读存储介质是计算机设备中的记忆设备,配置为存放程序和数据。可以理解的是,此处的计算机可读存储介质既可以包括计算机设备中的内置存储介质,当然也可以包括计算机设备所支持的扩展存储介质。计算机可读存储介质提供存储空间,该存储空间存储了终端的操作系统。并且,在该存储空间中还存放了适于被处理器加载并执行的一条或一条以上的指令,这些指令可以是一个或一个以上的计算机程序(包括程序代码)。需要说明的是,此处的计算机可读存储介质可以是高速RAM存储器(Random Access Memory,随机存取存储器),也可以是非不稳定的存储器(non-volatile memory),例如至少一个磁盘存储器。可由处理器加载并执行计算机可读存储介质中存放的一条或一条以上指令,以实现上述实施例中有关风储系统一次调频协调控制方法的相应步骤。
本公开实施例还提供一种计算机程序产品,所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质,该计算机程序使得计算机执行如上述方法实施例中记载的任何一种风储系统一次调频协调控制方法的部分或全部步骤。
本领域内的技术人员应明白,本公开的实施例可提供为方法、系统、或计算机程序产品。因此,本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不 限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
最后应当说明的是:以上实施例仅用以说明本公开的技术方案而非对其限制,尽管参照上述实施例对本公开进行了详细的说明,所属领域的普通技术人员应当理解:依然可以对本公开的实施方式进行修改或者等同替换,而未脱离本公开精神和范围的任何修改或者等同替换,其均应涵盖在本公开的权利要求保护范围之内。
工业实用性
本公开实施例中,可以根据风储系统的调频功率需求以及储能系统最大调频功率,实现储能系统的调频功率需求的确定,同时,根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求,通过综合考虑当前最大调频功率、荷电状态及运行状态,实现了储能系统内各储能单元的调频功率需求的合理分配,提高各储能单元的一致性和可控性,进而提升了整个储能系统响应一次调频的能力。

Claims (27)

  1. 一种风储系统一次调频协调控制方法,包括以下步骤:
    获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率;所述获取风储系统的调频功率需求的方法包括:
    获取风储系统并网点的电网频率以及电网额定频率;
    在电网频率在预设的频率死区范围的情况下,风储系统的调频功率需求为0;
    否则,根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求;
    所述在电网频率在预设的频率死区范围的情况下,还包括:
    获取储能系统的荷电状态和额定功率;
    根据储能系统的荷电状态和额定功率,以及预设的自恢复系数和预设的回归荷电状态范围,以及电网频率和频率死区范围,得到储能系统的回归功率;
    获取各储能单元的荷电状态,根据储能系统的回归功率以及各储能单元的荷电状态,得到各储能单元的回归功率;
    根据各储能单元的回归功率,控制各储能单元进行储能回归;
    根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求;
    获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态;
    根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求;
    根据各储能单元的调频功率需求控制各储能单元进行一次调频。
  2. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述得到储能系统的回归功率后,还包括:
    获取电网承受功率变化的边界值,并将储能系统的回归功率更新为储能系统的回归功率与电网承受功率变化的边界值中的较小值。
  3. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述预设的调频自适应系数中包括若干系数值,一系数值对应一频率偏差范围,且系数值越大,对应的频率偏差范围的边界值越大;
    所述根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求的方法包括:
    根据电网频率与电网额定频率之间的频率偏差所属的频率偏差范围,从预设的调频自适应系数中选取对应的系数值,根据电网频率与电网额定频率之间的频率偏差以及选取的系数值,得到风储系统的调频功率需求。
  4. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求的方法包括:
    根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到储能系统的调频功率需求。
  5. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述获取储能系统内各储能单元的当前最大调频功率的方法包括:
    获取储能系统内各储能单元的当前功率以及额定功率;
    根据储能系统内各储能单元的当前功率以及额定功率,得到储能系统内各储能单元的当前最大调频功率。
  6. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述运行状态包括启停状态、放电允许状态和充电允许状态。
  7. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、 荷电状态及运行状态,得到各储能单元的调频功率需求的方法包括:
    根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,以各储能单元的荷电状态一致性为功率分配原则,分配储能系统的调频功率需求,得到各储能单元的调频功率需求。
  8. 根据权利要求7所述的风储系统一次调频协调控制方法,其中,所述得到各储能单元的调频功率需求后,还包括:
    获取各储能单元当前功率以及额定功率;
    根据各储能单元当前功率以及额定功率,得到各储能单元功率约束,并根据各储能单元功率约束检核各储能单元的调频功率需求;
    在未通过校核的情况下,修改未通过校核的储能单元的运行状态,并根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及修改后的运行状态,以各储能单元的荷电状态一致性为功率分配原则,重新分配储能系统的调频功率需求,并根据重新分配结果更新各储能单元的调频功率需求。
  9. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,所述根据各储能单元的调频功率需求控制各储能单元进行一次调频的方法包括:
    获取各储能单元当前功率,各储能单元当前功率叠加各储能单元的调频功率需求,得到各储能单元调频功率,控制各储能单元以各储能单元调频功率运行。
  10. 根据权利要求1所述的风储系统一次调频协调控制方法,其中,还包括:根据风储系统的调频功率需求以及储能系统最大调频功率,得到风储系统内风电系统的调频功率需求;
    根据风电系统的调频功率需求控制风电系统进行一次调频。
  11. 根据权利要求10所述的风储系统一次调频协调控制方法,其中,所述根据风储系统的调频功率需求以及储能系统最大调频功率,得到风储 系统内风电系统的调频功率需求的方法包括:
    根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到风储系统内风电系统的调频功率需求。
  12. 根据权利要求10所述的风储系统一次调频协调控制方法,其中,所述根据风电系统的调频功率需求控制风电系统进行一次调频的方法包括:
    获取风电系统当前功率,风电系统当前功率叠加风电系统的调频功率需求,得到风电系统调频功率,控制风电系统以风电系统调频功率运行。
  13. 一种风储系统一次调频协调控制设备,包括:
    第一数据获取模块,配置为获取风储系统的调频功率需求以及风储系统内储能系统最大调频功率;
    第一需求分配模块,配置为根据风储系统的调频功率需求以及储能系统最大调频功率,得到储能系统的调频功率需求;
    第二数据获取模块,配置为获取储能系统内各储能单元的当前最大调频功率、荷电状态及运行状态;
    第二需求分配模块,配置为根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,得到各储能单元的调频功率需求;
    第一控制模块,配置为根据各储能单元的调频功率需求控制各储能单元进行一次调频;
    所述第一数据获取模块包括风储需求获取模块,所述风储需求获取模块配置为获取风储系统并网点的电网频率以及电网额定频率;在电网频率在预设的频率死区范围的情况下,风储系统的调频功率需求为0;否则,根据电网频率与电网额定频率之间的频率偏差,以及预设的调频自适应系数,得到风储系统的调频功率需求;
    所述风储系统需求获取模块还配置为,在电网频率在预设的频率死区范围的情况下,获取储能系统的荷电状态和额定功率;根据储能系统的荷电状态和额定功率,以及预设的自恢复系数和预设的回归荷电状态范围,以及电网频率和频率死区范围,得到储能系统的回归功率;获取各储能单元的荷电状态,根据储能系统的回归功率以及各储能单元的荷电状态,得到各储能单元的回归功率;根据各储能单元的回归功率,控制各储能单元进行储能回归。
  14. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述风储系统需求获取模块还配置为,获取电网承受功率变化的边界值,并将储能系统的回归功率更新为储能系统的回归功率与电网承受功率变化的边界值中的较小值。
  15. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述预设的调频自适应系数中包括若干系数值,一系数值对应一频率偏差范围,且系数值越大,对应的频率偏差范围的边界值越大;
    所述风储系统需求获取模块包括风储系统需求计算模块,风储系统需求计算模块配置为根据电网频率与电网额定频率之间的频率偏差所属的频率偏差范围,从预设的调频自适应系数中选取对应的系数值,根据电网频率与电网额定频率之间的频率偏差以及选取的系数值,得到风储系统的调频功率需求。
  16. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述第一需求分配模块包括储能需求分配模块,储能需求分配模块配置为根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到储能系统的调频功率需求。
  17. 根据权利要求13所述的风储系统一次调频协调控制设备,其中, 所述第二数据获取模块包括功率获取模块和最大调频功率获取模块,功率获取模块配置为获取储能系统内各储能单元的当前功率以及额定功率;最大调频功率获取模块配置为根据储能系统内各储能单元的当前功率以及额定功率,得到储能系统内各储能单元的当前最大调频功率。
  18. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述第二需求分配模块包括储能单元需求模块,储能单元需求模块配置为根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及运行状态,以各储能单元的荷电状态一致性为功率分配原则,分配储能系统的调频功率需求,得到各储能单元的调频功率需求。
  19. 根据权利要求18所述的风储系统一次调频协调控制设备,其中,所述第二需求分配模块还包括储能单元校验模块,储能单元校验模块配置为获取各储能单元当前功率以及额定功率;根据各储能单元当前功率以及额定功率,得到各储能单元功率约束,并根据各储能单元功率约束检核各储能单元的调频功率需求;在未通过校核的情况下,修改未通过校核的储能单元的运行状态,并根据储能系统的调频功率需求,以及各储能单元的当前最大调频功率、荷电状态及修改后的运行状态,以各储能单元的荷电状态一致性为功率分配原则,重新分配储能系统的调频功率需求,并根据重新分配结果更新各储能单元的调频功率需求。
  20. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述第一控制模块包括储能单元控制模块,储能单元控制模块配置为获取各储能单元当前功率,各储能单元当前功率叠加各储能单元的调频功率需求,得到各储能单元调频功率,控制各储能单元以各储能单元调频功率运行。
  21. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,还包括第三需求分配模块和第二控制模块;
    第三需求分配模块配置为根据风储系统的调频功率需求以及储能系统 最大调频功率,得到风储系统内风电系统的调频功率需求;第二控制模块配置为根据风电系统的调频功率需求控制风电系统进行一次调频。
  22. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述第三需求分配模块包括风电需求分配模块,
    风电需求分配模块配置为根据储能系统最大调频功率,以风储系统内风电系统弃风功率最小为分配原则,分配风储系统的调频功率需求,且在风储系统的调频功率需求为降低功率的情况下,给风电系统分配风储系统的调频功率需求,得到风储系统内风电系统的调频功率需求。
  23. 根据权利要求13所述的风储系统一次调频协调控制设备,其中,所述第二控制模块包括风电系统控制模块,
    风电系统控制模块配置为获取风电系统当前功率,风电系统当前功率叠加风电系统的调频功率需求,得到风电系统调频功率,控制风电系统以风电系统调频功率运行。
  24. 一种风储系统一次调频协调控制系统,包括数据采集装置、通讯装置以及权利要求13至23任一项所述的风储系统一次调频协调控制设备;
    数据采集装置和通讯装置均与风储系统一次调频协调控制设备连接;使用状态的情况下,数据采集装置与风储系统的并网点、风储系统内风电系统控制单元以及风储系统内储能系统控制单元均连接,通讯装置与风电系统控制单元以及储能系统内各储能单元的储能变流器PCS均连接;
    数据采集装置配置为采集风储系统的并网点的电网频率,以及风电系统和储能系统的运行数据,并发送至风储系统一次调频协调控制设备;
    通讯装置配置为风储系统一次调频协调控制设备与风电系统控制单元以及各储能单元的PCS之间的数据交互。
  25. 一种计算机设备,包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,其中,所述处理器执行所述计算机程序时实现如权利要求1至12任一项所述风储系统一次调频协调控制方 法的步骤。
  26. 一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,其中,所述计算机程序被处理器执行时实现如权利要求1至12任一项所述风储系统一次调频协调控制方法的步骤。
  27. 一种计算机程序产品,所述计算机程序产品包括一条或多条指令,所述一条或多条指令适于由处理器加载并执行如权利要求1至12任一项所述的风储系统一次调频协调控制方法。
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CN117117905A (zh) * 2023-10-23 2023-11-24 国网江西省电力有限公司电力科学研究院 一种基于光储协调的一次调频控制方法及系统
CN117375028A (zh) * 2023-12-08 2024-01-09 西安热工研究院有限公司 一种火电机组一次调频在线评估及储能优化配置方法
CN117375028B (zh) * 2023-12-08 2024-03-22 西安热工研究院有限公司 一种火电机组一次调频在线评估及储能优化配置方法
CN118336762A (zh) * 2024-06-12 2024-07-12 山东大学 一种风储联合系统调频优化方法、系统、终端及存储介质
CN118801447A (zh) * 2024-09-14 2024-10-18 中国三峡新能源(集团)股份有限公司 一种构网型储能系统的控制方法及系统

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