CN103904778A - Self-adaptive control method for microgrid - Google Patents
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Abstract
本发明提供一种微电网自适应控制方法，包括以下步骤：S01，将微电网控制系统分层设置，包括接入控制层、协调控制层和设备层；S02，将微电网状态分类，设定相应的状态控制算法；S03，接入控制层、协调控制层和设备层根据当前微电网状态量和步骤S02设定的状态控制算法执行微电网状态控制，当接入控制层、协调控制层和设备层有变化时采用消息机制送达相关控制层；S04，接入控制层、协调控制层和设备层根据消息优先级分别处理。本发明微电网自适应控制方法不完全依赖通信，在故障情况下能实现自适应控制策略，实现了微电网控制的智能化降低了微电网的适用要求，状态控制策略的自适应性很好的适应了配电网各种突发事件或故障情况。
The present invention provides a microgrid self-adaptive control method, comprising the following steps: S01, setting the microgrid control system in layers, including an access control layer, a coordination control layer, and a device layer; S02, classifying the status of the microgrid, setting Corresponding state control algorithm; S03, the access control layer, the coordination control layer and the equipment layer execute the micro grid state control according to the current micro grid state quantity and the state control algorithm set in step S02, when the access control layer, coordination control layer and When there is a change in the equipment layer, the message mechanism is used to send it to the relevant control layer; S04, the access control layer, the coordination control layer and the equipment layer process the messages according to the priority of the message. The micro-grid adaptive control method of the present invention does not completely rely on communication, and can realize an adaptive control strategy in the case of a fault, realizes the intelligentization of micro-grid control, reduces the applicable requirements of the micro-grid, and has a good adaptability of the state control strategy Adapted to various emergencies or failures of the distribution network.
Description
Technical field
The present invention relates to electric power system and automatic field, be specifically related to micro-electrical network self-adaptation control method.
Background technology
Along with the development of socio economic situation and the propelling of construction intelligent grid process, the problem that rural power grids exist highlights gradually, if the problems such as remote districts " without electricity or short of electricity ", " power supply quality is poor " and " power supply reliability is low " are at vast rural area ubiquity, therefore, in the face of rural power grids electricity consumption new situations, how effectively to utilize rural area renewable and clean energy resource, solve on the spot the reliable electrical problem in rural area, the new approaches of actively seeking rural power grids power grid construction become the new problem in the urgent need to research at present.At present, distributed electrical source position flexibly with the fabulous adaptation of the feature of disperseing the electricity needs and the resource distribution that disperse, delayed the required huge investment that upgrades of defeated, power distribution network, it and electrical network are for subsequent use each other simultaneously, and power supply reliability is also improved.Have pollution less, reliability and many-sided advantage such as efficiency of energy utilization is high, infield is flexible.But a large amount of distributed power sources that disperse, that various informative, performance is different are simply incorporated into the power networks and can impact electrical network and user, bring adverse influence to the quality of power supply, system protection, system operation etc.
Summary of the invention
Simply be incorporated into the power networks and can impact electrical network and user for the distributed power source a large amount of dispersions, various informative, performance is different, bring adverse influence to the quality of power supply, system protection, system operation etc.Ensureing on the safe and reliable power supply basis of intelligent distribution network the maximum possible regenerative resource ratio of dissolving, ensure micro-electrical network even running and flexible access power distribution network.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Micro-electrical network self-adaptation control method, is characterized in that, comprises the following steps:
S01, arranges micro-grid control system layering, comprises access control layer, coordinates key-course and mechanical floor, and described coordination control is arranged between access control layer and mechanical floor.
Access control layer correspondence micro-electrical network access control system, obtains micro-electric network information by coordinating key-course, obtains power distribution network information from distribution management system, realizes micro-operation of power networks monitoring and controlling and relevant senior application.Coordinate key-course equipment and mainly refer to micro-operation of power networks controller, the main corresponding control command of transmission of being responsible for is specifically implemented to control to mechanical floor, send micro-electrical network to carry out information on main website layer simultaneously.Mechanical floor comprises the equipment such as photovoltaic electricity generation controller, controller of fan, energy-storage battery reversible controller and correlative measurement control terminal, on-Line Monitor Device.Step S02 is coordinating key-course realization.Coordinate key-course and comprise master controller and communication controler, master controller is used for moving micro-electric network state control algolithm, and communication controler is used for coordinating between key-course and access control layer, mechanical floor.
S02, by micro-electric network state classification, set corresponding state control algolithm, described micro-electric network state comprises normal operating condition, communication fault state and island state, and the state control algolithm of described normal operating condition, communication fault state and island state is respectively normal operating condition control method, communication fault state control method and island state control method; For realizing the quick response of control system, program adopts the method for designing based on message mechanism, each key-course is the state control algolithm executing state control to set according to current state amount, in the time that changing, levels adopt message mechanism to send to, key-course is processed respectively according to message priority, avoids because waiting for that causing task to process incurs loss through delay.The adaptivity of state control algolithm has well adapted to the various accidents of power distribution network or failure condition.
Island state refers in the time that power distribution network breaks down, and micro-electrical network cannot continue to be incorporated into the power networks, or when the micro-electrical network off-grid of higher level's dispatching patcher order, is to ensure the power supply of micro-grid system internal loading, and micro-electrical network needs islet operation.
S03, access control layer, coordination key-course and mechanical floor are carried out micro-electric network state control according to the state control algolithm of current micro-electric network state amount and step S02 setting, in the time that access control layer, coordination key-course and mechanical floor information change, adopt message mechanism to send to relevant control layer.
S04, access control layer, coordination key-course and mechanical floor are processed respectively according to message priority.
The micro-electrical network self-adaptation control method of the present invention can solve micro-power grid control of micro-electrical network normal operating condition, communication fault state and state, and in step S02, state control algolithm comprises normal operating condition control method, communication fault state control method and island state control method.
Normal operating condition control method specifically comprises the following steps, access control layer is according to the working condition of current micro-electrical network and major network, employing comprises and site is determined power, does not limit power, considered the control strategy of Distribution Network Load Data peak load shifting simultaneously, is handed down to coordination key-course; Coordinate key-course, according to the measured value sending on mechanical floor and quantity of state, described control strategy is decomposed into the control signal to equipment, be handed down to mechanical floor, equipment actuator finally completes control procedure.
Communication fault state control method specifically comprises the following steps, and between access control layer and coordination key-course, occurs communication failure, and control decision function is transferred to coordination key-course by access control layer, forms two-layer control mode; Occur communication failure when coordinating key-course and equipment component layer distributed power source, the distributed power source of mechanical floor is carried out setting distributed power source control strategy on the spot according to measured value and quantity of state.According to this method, micro-grid control system design relies on communication system not too much, strengthens communication stability.
Island state control method specifically comprises following two kinds of situations:
1. due to the island state control method initiatively producing from net: to coordinate key-course receive from after net control command according to the generated output in micro-grid system and bearing power situation, notice load control appliance cuts away inessential load or starts energy storage device and maintains energy balance, again the control model of master controller is controlled and is converted to V/f control model by PQ, the grid-connected switch of tripping simultaneously, smoothly cut from network operation pattern, coordinate key-course and will on data message, deliver to access control layer, access control layer is taked overall control strategy according to islet operation situation;
2. due to the passive island state control method producing from net: in the time that coordination key-course obtains grid-connected switch changed position information at first, cut away inessential load or start energy storage device according to energy balance and maintain energy balance, the control model of master controller is controlled and is converted to V/f control by PQ simultaneously, the pattern that completes is switched; In the time that the master controller of coordination key-course first detects fault initiating island protect; main controller controls pattern is controlled and is converted to V/f control by PQ; communication controler adopts limit priority to pass to coordination key-course failure message; for the Adaptive Control scheme of forecast accident; carry out emergency control measure; complete by PQ control be converted to V/f control pattern switch, coordinate key-course will on data message, deliver to access control layer, access control layer is taked overall control strategy according to islet operation situation.
More preferably, access control layer, coordination key-course and mechanical floor are taked independently response speed, and access control layer adopts second/the number of minutes magnitude response speed, coordinate key-course and adopt millisecond/number of seconds magnitude response speed, and mechanical floor adopts a millisecond order of magnitude response speed.Access control layer, coordination key-course and the mechanical floor of micro-electrical network takes different response speeds well to adapt to micro-operation of power networks pattern switching rapidity and higher level's dispatching patcher feature of property at a slow speed.
Preferably, call for responding national low-carbon (LC), regenerative resource maximum is dissolved as far as possible.
Beneficial effect: the micro-electrical network self-adaptation control method of the present invention not exclusively relies on communication, under failure condition, can realize ADAPTIVE CONTROL, the intellectuality that has realized micro-power grid control has reduced the applicable requirement of micro-electrical network, and the adaptivity of state control strategy has well adapted to the various accidents of power distribution network or failure condition.Access control layer, coordination key-course and the mechanical floor of micro-electrical network takes different response speeds well to adapt to micro-operation of power networks pattern switching rapidity and higher level's dispatching patcher feature of property at a slow speed.
Brief description of the drawings
Fig. 1 is flow chart of the present invention;
Fig. 2 is access control layer, coordination key-course and mechanical floor structural representation.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As depicted in figs. 1 and 2, micro-electrical network self-adaptation control method, comprises the following steps:
S01, arranges micro-grid control system layering, comprises access control layer, coordinates key-course and mechanical floor, and described coordination control is arranged between access control layer and mechanical floor.Access control layer correspondence micro-electrical network access control system, obtains micro-electric network information by coordinating key-course, obtains power distribution network information from distribution management system, realizes micro-operation of power networks monitoring and controlling and relevant senior application.Coordinate key-course equipment and mainly refer to micro-operation of power networks controller, the main corresponding control command of transmission of being responsible for is specifically implemented to control to mechanical floor, send micro-electrical network to carry out information on main website layer simultaneously.Mechanical floor comprises the equipment such as photovoltaic electricity generation controller, controller of fan, energy-storage battery reversible controller and correlative measurement control terminal, on-Line Monitor Device.Coordinate key-course and comprise master controller and communication controler.
S02, by micro-electric network state classification, set corresponding state control algolithm, described micro-electric network state comprises normal operating condition, communication fault state and island state, and the state control algolithm of described normal operating condition, communication fault state and island state is respectively normal operating condition control method, communication fault state control method and island state control method.
S03, access control layer, coordination key-course and mechanical floor are carried out micro-electric network state control according to the state control algolithm of current micro-electric network state amount and step S02 setting, in the time that access control layer, coordination key-course and mechanical floor amount of information change, adopt message mechanism to send to relevant control layer.
S04, access control layer, coordination key-course and mechanical floor are processed respectively according to message priority.
In step S02, normal operating condition control method, communication fault state control method and island state control method particular content are as follows.
1. in this running of normal operating condition control method, station level access control system issues micro-electrical network plan of exerting oneself next day according to proxima luce (prox. luc) load prediction and operation of power networks situation, and revise in real time in the time carrying out the same day, general tens minutes once, the micro-power system controller of wall will be exerted oneself Task-decomposing to each micro-source according to distributed power source generating prediction and main website generation schedule, and the operation in the each micro-source of real time coordination, regulating cycle is tens seconds.
2. communication fault state control method
In micro-communication system of power grids interruption situation, micro-electrical network departs from major network independent operating, the energy storage device of micro-electrical network provides reference voltage, taking V/f control model and regulating to exert oneself provides micro-grid system internal power balance, each micro-electric network source is taked permanent speed regulation Droop control strategy by inverter, still can realize and taking over seamlessly.
3. island state control method
In the time that power distribution network breaks down, micro-electrical network cannot continue to be incorporated into the power networks, or when the micro-electrical network off-grid of higher level's dispatching patcher order, is to ensure the power supply of micro-grid system internal loading, and micro-electrical network needs islet operation.
1. initiatively from net.For higher level's dispatching patcher command situation, control procedure is comparatively simple.Coordinate key-course receive from after net control command according to the generated output in micro-grid system and bearing power situation, notice load control appliance cuts away inessential load or starts energy storage device and maintains energy balance, again the control model of master controller is controlled and is converted to V/f control model by PQ, the grid-connected switch of tripping simultaneously, smoothly cuts from network operation pattern.
2. passive from net.A kind of situation is to coordinate key-course to obtain at first grid-connected switch changed position information.First according to energy balance cut away inessential load or start energy storage device maintain energy balance, simultaneously by the control model of master controller by PQ control be converted to V/f control, complete pattern switch.Another kind of situation master controller first detects fault initiating island protect; main controller controls pattern is controlled and is converted to V/f control by PQ; communication controler will adopt limit priority to pass to coordination key-course this message; again for the Adaptive Control scheme of forecast accident; carry out emergency control measure, the pattern that completes is switched.Above-mentioned two situations will be delivered to access control layer after the pattern that completes is switched in information, access control layer is taked overall control strategy according to islet operation situation.
Below be only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. micro-electrical network self-adaptation control method, is characterized in that, comprises the following steps:
S01, arranges micro-grid control system layering, comprises access control layer, coordinates key-course and mechanical floor, and described coordination key-course is arranged between access control layer and mechanical floor;
Described access control layer correspondence micro-electrical network access control system, obtains micro-electric network information by coordinating key-course, obtains power distribution network information from distribution management system, realizes micro-operation of power networks monitoring and controlling and relevant senior application;
Described coordination key-course equipment is used for accessing micro-operation of power networks controller, is responsible for sending corresponding control command and specifically implements to control to mechanical floor, send micro-electrical network to carry out information on controlling center simultaneously; Coordinate key-course and comprise master controller and communication controler, master controller is used for moving micro-electric network state control algolithm, and communication controler is used for coordinating between key-course and access control layer, mechanical floor;
S02, by micro-electric network state classification, set corresponding state control algolithm, described micro-electric network state comprises normal operating condition, communication fault state and island state, and the state control algolithm of described normal operating condition, communication fault state and island state is respectively normal operating condition control method, communication fault state control method and island state control method;
S03, access control layer, coordination key-course and mechanical floor are carried out micro-electric network state control according to the state control algolithm of current micro-electric network state amount and step S02 setting, in the time that access control layer, coordination key-course and mechanical floor amount of information change, adopt message mechanism to send to corresponding key-course;
S04, access control layer, coordination key-course and mechanical floor are processed respectively according to message priority.
2. micro-electrical network self-adaptation control method according to claim 1, is characterized in that, in described step S02, normal operating condition control method specifically comprises the following steps,
Access control layer is according to the working condition of current micro-electrical network and major network, adopts to comprise and site is determined power, does not limit power, considered the control strategy of Distribution Network Load Data peak load shifting simultaneously, is handed down to coordination key-course; Coordinate key-course, according to the measured value sending on mechanical floor and quantity of state, described control strategy is decomposed into the control signal to equipment, be handed down to mechanical floor, equipment actuator finally completes control procedure.
3. micro-electrical network self-adaptation control method according to claim 1, is characterized in that, described step S02 communication fault state control method specifically comprises the following steps,
Between access control layer and coordination key-course, occur communication failure, control decision function is transferred to coordination key-course by access control layer, forms two-layer control mode;
There is communication failure when coordinating key-course and equipment component layer distributed power source, mechanical floor is carried out the local control strategy of setting distributed power source according to the measured value of distributed power source detection and control terminal this locality and quantity of state, micro-electrical network departs from major network independent operating, the energy storage device of micro-electrical network provides reference voltage, taking V/f control model and regulating provides micro-grid system internal power balance, each micro-electric network source is exerted oneself and is taked permanent speed regulation Droop control strategy by inverter, realizes micro-electrical network and takes over seamlessly from net.
4. micro-electrical network self-adaptation control method according to claim 1, is characterized in that, island state control method specifically comprises described in step S02,
1. due to the island state control method initiatively producing from net: to coordinate key-course receive from after net control command according to the generated output in micro-grid system and bearing power situation, notice load control appliance cuts away inessential load or starts energy storage device and maintains energy balance, again the control model of the master controller of controlling micro-electrical network reference voltage is controlled and is converted to V/f control model by PQ, the grid-connected switch of tripping simultaneously, smoothly cut from network operation pattern, coordinate key-course and will on data message, deliver to access control layer, access control layer is taked overall control strategy according to islet operation situation,
2. due to the passive island state control method producing from net: in the time that coordination key-course obtains grid-connected switch changed position information at first, cut away inessential load or start energy storage device according to energy balance and maintain energy balance, the control model of master controller is controlled and is converted to V/f control by PQ simultaneously, the pattern that completes is switched; In the time that the master controller of coordination key-course first detects fault initiating island protect; main controller controls pattern is controlled and is converted to V/f control by PQ; communication controler adopts limit priority to pass to coordination key-course failure message; for the Adaptive Control scheme of forecast accident; carry out emergency control measure; complete by PQ control be converted to V/f control pattern switch, coordinate key-course will on data message, deliver to access control layer, access control layer is taked overall control strategy according to islet operation situation.
5. micro-electrical network self-adaptation control method according to claim 1, is characterized in that, described access control layer, coordination key-course and mechanical floor are taked independently response speed.
6. micro-electrical network self-adaptation control method according to claim 1, is characterized in that, described mechanical floor comprises photovoltaic electricity generation controller, controller of fan, energy-storage battery reversible controller and correlative measurement control terminal and on-Line Monitor Device.
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| CN104155932A (en) * | 2014-07-10 | 2014-11-19 | 国家电网公司 | Distributed photovoltaic grid-connected power generation monitoring system, energy consumption managing method and photovoltaic grid-connected power generation monitoring equipment |
| CN104377830A (en) * | 2014-11-26 | 2015-02-25 | 南京四方亿能电力自动化有限公司 | GOOSE-based intelligent micro-grid rapid control system and control strategy distribution method |
| CN106130792A (en) * | 2016-08-22 | 2016-11-16 | 扬州华鼎电器有限公司 | Photovoltaic microgrid control system integral, flexible optimization method, Apparatus and system |
| CN107147106A (en) * | 2017-05-02 | 2017-09-08 | 深圳市矩形科技有限公司 | Microgrid energy real-time management control device |
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| CN104155932A (en) * | 2014-07-10 | 2014-11-19 | 国家电网公司 | Distributed photovoltaic grid-connected power generation monitoring system, energy consumption managing method and photovoltaic grid-connected power generation monitoring equipment |
| CN104377830A (en) * | 2014-11-26 | 2015-02-25 | 南京四方亿能电力自动化有限公司 | GOOSE-based intelligent micro-grid rapid control system and control strategy distribution method |
| US10008854B2 (en) | 2015-02-19 | 2018-06-26 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| US10951037B2 (en) | 2015-02-19 | 2021-03-16 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| US11355936B2 (en) | 2015-02-19 | 2022-06-07 | Enphase Energy, Inc. | Method and apparatus for time-domain droop control with integrated phasor current control |
| CN106130792A (en) * | 2016-08-22 | 2016-11-16 | 扬州华鼎电器有限公司 | Photovoltaic microgrid control system integral, flexible optimization method, Apparatus and system |
| CN106130792B (en) * | 2016-08-22 | 2023-04-18 | 扬州华鼎电器有限公司 | Overall elasticity optimization method, device and system for photovoltaic micro-grid control system |
| CN107147106A (en) * | 2017-05-02 | 2017-09-08 | 深圳市矩形科技有限公司 | Microgrid energy real-time management control device |
| CN107359617A (en) * | 2017-08-08 | 2017-11-17 | 国网江苏省电力公司盐城供电公司 | A kind of active distribution network source net lotus coordinated control system comprising microgrid group |
| CN107359617B (en) * | 2017-08-08 | 2023-09-26 | 国网江苏省电力公司盐城供电公司 | An active distribution source-grid-load coordination control system including a microgrid group |
| CN110365044A (en) * | 2019-07-02 | 2019-10-22 | 北京群菱能源科技有限公司 | A kind of micro-capacitance sensor multimode self-adaptive wavelet base system |
| CN111030108A (en) * | 2019-12-27 | 2020-04-17 | 深圳天顺智慧能源科技有限公司 | Micro-grid and method for realizing automatic tuning of control strategy of micro-grid |
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Application publication date: 20140702 |