CN113964867A - Wind, light and diesel storage hybrid energy control system and method - Google Patents
Wind, light and diesel storage hybrid energy control system and method Download PDFInfo
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- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00004—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the power network being locally controlled
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- H—ELECTRICITY
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- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
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Abstract
The invention provides a wind, light, diesel and storage hybrid energy control system and a method, comprising a hybrid energy controller, wherein the hybrid energy controller is respectively connected with: the wind turbine controller is used for collecting the output voltage and current of the wind driven generator and controlling the input or output of the wind driven generator; the solar controller is used for collecting the output voltage and current of the solar photovoltaic power generation array and controlling the input or output of the solar photovoltaic power generation array; the storage battery controller is used for collecting the residual capacity of the storage battery pack; the diesel engine controller is used for collecting the output voltage and current of the diesel generator and controlling the diesel generator to be switched in or out; and a bus data acquisition unit for acquiring bus voltage and current at the DC/AC side; the power output ends of the wind generating set, the solar photovoltaic power generation array and the diesel generator are connected with the power input end of the storage battery pack; according to the invention, a detailed operation control strategy is formulated according to the system operation state, the operation economy is improved, the reliable operation of the system is ensured, and the wind, light, diesel and storage hybrid energy system can operate safely, reliably and efficiently.
Description
Technical Field
The invention relates to the field of new energy control systems, in particular to a wind, light and diesel storage hybrid energy control system and method.
Background
At present, China is the first major country of energy consumption, economy is the rapid development stage, and the demand for electric power is quite large, so a power generation mode which takes energy consumption as a cost for a long time is replaced, and especially in islands and remote mountain areas, a plurality of problems such as high cost, large pollution and the like are caused by a mode of carrying out long-distance transportation through thermal power centralized power generation.
Therefore, new energy power generation systems attract more and more attention, the optimal utilization mode of wind energy and solar energy is to convert the wind energy and the solar energy into electric energy, but the wind energy and the solar energy are influenced by factors such as geographical positions, seasonal changes, weather environments and the like in the conversion process, generally, the wind strength is high in the north in winter, and the solar radiation energy is less; in summer, the wind strength is reduced, but the solar radiation energy is greatly increased. The use of wind and solar energy for power generation has the disadvantages of discontinuities and uncertainties.
Disclosure of Invention
The invention aims to provide a wind, light and diesel hybrid energy control system and a method, which overcome the defects of the existing wind energy and solar energy generation and realize safe, reliable, efficient and continuous electric energy supply.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a wind, light and diesel storage hybrid energy control system which comprises a hybrid energy controller, wherein the hybrid energy controller is respectively connected with:
the wind turbine controller is used for collecting the output voltage and current of the wind driven generator and controlling the input or output of the wind driven generator;
the solar controller is used for collecting the output voltage and current of the solar photovoltaic power generation array and controlling the input or output of the solar photovoltaic power generation array;
the storage battery controller is used for collecting the residual capacity of the storage battery pack;
the diesel engine controller is used for collecting the output voltage and current of the diesel generator and controlling the diesel generator to be switched in or out;
and a bus data acquisition unit for acquiring bus voltage and current at the DC/AC side;
and the power output ends of the wind generating set, the solar photovoltaic power generation array and the diesel generator are connected with the power input end of the storage battery pack.
Preferably, the hybrid energy controller comprises a central data processing unit, wherein the central data processing unit is respectively connected with the wind turbine controller, the solar controller, the storage battery controller, the diesel engine controller and the bus data acquisition unit.
Preferably, the central data processing unit is respectively connected with the wind turbine controller, the solar controller, the storage battery controller, the diesel engine controller and the bus data acquisition unit through an RS485 communication unit.
Preferably, the hybrid energy controller is also in control connection with a DC/AC bidirectional converter.
A control method of a wind-solar-diesel-storage hybrid energy source is based on the system and comprises the following steps:
calculating a net load power;
and controlling the input or the output of the wind generating set, the solar photovoltaic power generation array and the diesel generator according to the calculated net load power.
Preferably, the specific method of calculating the net load power is:
calculating responsible power according to the collected alternating current bus voltage and alternating current bus current;
respectively calculating the output power of the corresponding wind generating set and the output power of the solar photovoltaic array according to the acquired output voltage and current of the wind generating set and the output voltage and current of the solar photovoltaic array;
and calculating according to the calculated responsible power, the output power of the wind generating set and the output power of the solar photovoltaic array to obtain the net load power.
Preferably, the method for controlling the power input terminal of the load according to the calculated net load power includes:
s11, when the net load power obtained by calculation is larger than zero, the operation enters S12; otherwise, controlling the wind generating set and the solar photovoltaic power generation array to supply power to the storage battery pack;
s12, if the collected residual capacity SOC of the storage battery pack is larger than 10%, supplying power to the storage battery pack through the wind generating set and the solar photovoltaic power generation array; otherwise, go to S13;
and S13, calculating the output power of the diesel generator, and controlling the start and stop of the wind generating set, the solar photovoltaic power generation array and the diesel generator according to the output power of the diesel generator.
Preferably, the start and stop of the wind generating set, the solar photovoltaic power generation array and the diesel generator are controlled according to the output power of the diesel generator, and the specific method comprises the following steps:
if the output power D of the diesel engine generator>1.1LNWhen the battery pack is used, the diesel generator supplies power to the battery pack; otherwise, the wind generating set and the solar photovoltaic generating array supply power to the storage battery.
Compared with the prior art, the invention has the beneficial effects that:
the wind-solar-diesel-storage hybrid energy control system integrates wind power generation, solar photovoltaic power generation, diesel power generation and storage battery power supply into a whole, can fully utilize wind energy and solar energy resources, and replaces or supplements the power provided by the storage battery and the diesel power generation.
According to the control method of the wind, light, diesel and storage hybrid energy, provided by the invention, new energy power generation is prioritized according to the requirements of a comprehensive control strategy and by taking power balance as a criterion, the power distribution and operation management of a system multi-energy source are integrally regulated and controlled, and a detailed operation control strategy is formulated according to the operation state of the system, so that the operation economy is improved, the reliable operation of the system is ensured, and the wind, light, diesel and storage hybrid energy system is operated safely, reliably and efficiently.
Drawings
FIG. 1 is a schematic diagram of the design of a wind-solar-diesel-storage hybrid energy control system according to the present invention;
FIG. 2 is a schematic diagram of a bus structure of the wind-solar-diesel-storage hybrid energy system;
FIG. 3 is a flowchart of a control strategy procedure of the wind-solar-diesel-storage hybrid energy system of the invention;
description of reference numerals: 1, a hybrid energy controller; 2, a wind turbine controller; 3, a solar controller; 4 a battery controller; 5 a diesel engine controller; a 6DC/AC bi-directional converter; 7, a hybrid energy scheduling center; 1-1GPRS communication unit; 1-2 data storage units; 1-3 central data processing unit; 1-4 bus information acquisition units; 1-5RS485 communication unit.
Detailed Description
The following detailed description of the embodiments of the present invention refers to the accompanying drawings.
As shown in fig. 1, a schematic diagram of a design principle of a wind, light, diesel and storage hybrid energy control system is provided, the wind, light, diesel and storage hybrid energy control system provided by the invention relates to communication and control with a plurality of devices, and also relates to coordination control among a plurality of controllers of the energy control system, and specifically comprises:
The wind turbine controller 2 is connected with the wind turbine generator set, is used for monitoring the output voltage, the current, the generating capacity and the rotating speed of the fan of the wind turbine generator, and can also control the input or the output of the wind turbine generator.
The solar controller 3 is connected with the solar photovoltaic power generation array and used for monitoring the voltage, the current, the power generation amount and the solar radiation amount of the solar photovoltaic output and controlling the input or the output of the solar photovoltaic power generation system.
The battery controller 4 is connected to the battery pack and is configured to monitor the battery voltage, current, temperature, and remaining capacity, obtain power and output power information, and also control charging and discharging of the battery.
The diesel engine controller 5 is connected with the diesel engine generator, and is used for monitoring the voltage, the current, the generated energy, the running time, the temperature and the oil mass information of the diesel engine generator and controlling the start, the stop, the input or the cut-out of the diesel engine generator.
The DC/AC bidirectional converter 6 is respectively connected with a 24V direct current bus and a 220V alternating current bus and is used for bidirectional conversion between the 24V direct current and the 220V alternating current.
The hybrid energy controller 1 is subdivided into a plurality of units according to the functions thereof, and specifically comprises a GPRS communication unit 1-1, a data storage unit 1-2, a central data processing unit 1-3, a bus data acquisition unit 1-4 and an RS485 communication unit 1-5, wherein:
the GPRS communication unit 1-1 uploads system data to the remote hybrid energy scheduling center 7 in real time through a GPRS network, and receives a hybrid energy operation control instruction issued by the remote hybrid energy scheduling center 7.
The data storage unit 1-2 is used for storing various data in the system operation and storing data information analyzed and processed by the central data processing unit 1-3 in real time.
The bus data acquisition units 1-4 are used to acquire voltage, current and temperature information on the DC/AC bus.
The RS485 communication units 1-5 are used for establishing communication connection with the wind turbine controller 2, the solar controller 3, the storage battery controller 4, the diesel engine controller 5 and the DC/AC bidirectional converter 6 through RS485 communication buses respectively.
The central data processing unit 1-3 is used for making a corresponding response to the data transmitted by the RS485 communication unit 1-5 according to a system control decision program, sending a control command through the RS485 communication unit 1-5, storing the data information of the hybrid energy of the wind, light and diesel storage into the data storage unit 1-2, and simultaneously uploading the data information to the remote hybrid energy dispatching center 7 through the GPRS communication unit 1-1 in real time; meanwhile, if a hybrid energy operation control instruction issued by the hybrid energy dispatching center 7 is received, a control command is also sent to the control center through the RS485 communication units 1 to 5.
As shown in fig. 2, which is a schematic view of a bus structure of the wind, photovoltaic, diesel and storage hybrid energy system of the invention, a wind generating set and a solar photovoltaic array convert by internal power electronic devices to output stable 24V direct current, and then converge on a direct current bus, the direct current bus converts into 220V alternating current by a DC/AC bidirectional converter and connects to an alternating current bus, and the alternating current bus provides stable electric energy for an alternating current load.
The storage battery controller can acquire electric energy from the direct current bus to charge the storage battery pack, and can also control the storage battery pack to output the electric energy to the outward direct current bus. If necessary, the hybrid power controller 1 will send a command to the diesel generator controller 5 to start the diesel generator to output electric energy to the ac bus. The bus structure adopted by the invention only needs to consider power balance, thereby reducing the difficulty and cost of micro-grid control, improving the power supply quality and system efficiency, and having low cost and high efficiency.
As shown in fig. 3, a flow chart of a control strategy program of the wind, light, diesel and storage hybrid energy system of the invention is provided, and the specific control method is as follows:
L＝UAC×IAC (1)
wherein, L is load power; u shapeACIs the AC bus voltage; i isACIs an alternating bus current.
W＝UW×IW (2)
S＝US×IS (3)
wherein W is the output power of the wind driven generator; u shapeWOutputting voltage for the wind driven generator; i isWOutputting current for the wind driven generator; s is the output power of the solar photovoltaic array; u shapeSOutputting voltage for the solar photovoltaic array; i isSAnd outputting current for the solar photovoltaic array.
LN＝L-W-S (4)
wherein L isNIs the net load power.
if the collected residual capacity SOC of the storage battery pack is less than or equal to 10%, entering a step 6;
D＝UD×ID
wherein, UDIs the output voltage of the diesel generator; i isDIs the output current of the diesel generator.
If the output power D of the diesel engine generator>1.1LNWhen the power of the diesel engine is sufficient, the diesel engine is considered to be sufficient in power, and then the diesel generator supplies power to the storage battery pack, so that electric energy is provided for a load; otherwise, the wind generating set and the solar photovoltaic generating array supply power to the storage battery set, and the storage battery set supplies power to the loadCan be used.
In summary, the wind-solar-diesel-storage hybrid energy control system is a composite power energy technology integrating wind power generation, solar photovoltaic power generation, diesel power generation and storage battery power supply, and compared with a single wind power generation system or a single photovoltaic power generation system, the wind-solar-diesel-storage hybrid energy control system can more fully utilize wind energy and solar energy resources to replace or supplement the power provided by the storage battery and the diesel power generation on the premise of meeting the same requirements. According to the requirements of a comprehensive control strategy and by taking power balance as a criterion, new energy power generation is prioritized, the power distribution and operation management of the system multi-energy source are regulated and controlled on the whole, a detailed operation control strategy is formulated according to the operation state of the system, the operation economy is improved, the reliable operation of the system is ensured, and the wind, light and diesel hybrid energy system can operate safely, reliably and efficiently.
The above-mentioned embodiments are only examples of the present invention, which is not intended to limit the present invention, and it should be understood that other changes and modifications which are within the spirit and principle of the present invention and are made by those skilled in the art may be made without departing from the scope of the invention as defined in the appended claims.
Claims (8)
1. A wind, light and diesel storage hybrid energy control system is characterized by comprising a hybrid energy controller (1), wherein the hybrid energy controller (1) is respectively connected with:
the wind turbine controller (2) is used for collecting the output voltage and current of the wind driven generator and controlling the input or output of the wind driven generator;
the solar controller (3) is used for collecting the output voltage and current of the solar photovoltaic power generation array and controlling the input or output of the solar photovoltaic power generation array;
a battery controller (4) for collecting the remaining capacity of the battery pack;
a diesel engine controller (5) for collecting the output voltage and current of the diesel generator and controlling the diesel generator to be switched in or out;
and a bus data acquisition unit (1-4) for acquiring bus voltage and current on the DC/AC side;
and the power output ends of the wind generating set, the solar photovoltaic power generation array and the diesel generator are connected with the power input end of the storage battery pack.
2. The wind, solar, diesel and storage hybrid energy control system according to claim 1, characterized in that the hybrid energy controller (1) comprises a central data processing unit (1-3), wherein the central data processing unit (1-3) is respectively connected with the wind turbine controller (2), the solar controller (3), the storage battery controller (4), the diesel engine controller (5) and the bus data acquisition unit (1-4).
3. The wind, solar, diesel and storage hybrid energy control system according to claim 2, characterized in that the central data processing unit (1-3) is respectively connected with the wind turbine controller (2), the solar controller (3), the storage battery controller (4), the diesel engine controller (5) and the bus data acquisition unit (1-4) through the RS485 communication unit (1-5).
4. The wind, light, diesel and storage hybrid energy control system according to claim 1, characterized in that the hybrid energy controller (1) is further connected with a DC/AC bidirectional converter (6).
5. A control method of a wind-solar-diesel-storage hybrid energy source, which is based on the system of any one of claims 1-4, and comprises the following steps:
calculating a net load power;
and controlling the input or the output of the wind generating set, the solar photovoltaic power generation array and the diesel generator according to the calculated net load power.
6. The control method of the wind, light, diesel and storage hybrid energy source according to claim 5, characterized in that the concrete method for calculating the net load power is as follows:
calculating responsible power according to the collected alternating current bus voltage and alternating current bus current;
respectively calculating the output power of the corresponding wind generating set and the output power of the solar photovoltaic array according to the acquired output voltage and current of the wind generating set and the output voltage and current of the solar photovoltaic array;
and calculating according to the calculated responsible power, the output power of the wind generating set and the output power of the solar photovoltaic array to obtain the net load power.
7. The control method of the wind, light, diesel and storage hybrid energy source according to claim 5, wherein the power input end of the load is controlled according to the calculated net load power, and the specific method is as follows:
s11, when the net load power obtained by calculation is larger than zero, the operation enters S12; otherwise, controlling the wind generating set and the solar photovoltaic power generation array to supply power to the storage battery pack;
s12, if the collected residual capacity SOC of the storage battery pack is larger than 10%, supplying power to the storage battery pack through the wind generating set and the solar photovoltaic power generation array; otherwise, go to S13;
and S13, calculating the output power of the diesel generator, and controlling the start and stop of the wind generating set, the solar photovoltaic power generation array and the diesel generator according to the output power of the diesel generator.
8. The wind, light, diesel and storage hybrid energy control method according to claim 7, characterized in that the start and stop of the wind generating set, the solar photovoltaic power generation array and the diesel generator are controlled according to the output power of the diesel generator, and the specific method is as follows:
if the output power D of the diesel engine generator>1.1LNWhen the battery pack is used, the diesel generator supplies power to the battery pack; otherwise, the wind generating set and the solar photovoltaic generating array supply power to the storage battery.
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