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A wind-solar-storage energy exchange control method and system for a virtual synchronous generator

An energy storage system and virtual synchronization technology, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve problems such as voltage or frequency fluctuations and low dispatchability

Active Publication Date: 2021-04-30
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

Considering the randomness, intermittentness, and low dispatchability of distributed energy in the microgrid system, when it is incorporated into the entire microgrid system through an inverter, there will be large fluctuations in voltage or frequency

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  • A wind-solar-storage energy exchange control method and system for a virtual synchronous generator
  • A wind-solar-storage energy exchange control method and system for a virtual synchronous generator
  • A wind-solar-storage energy exchange control method and system for a virtual synchronous generator

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Embodiment Construction

[0051] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0052]According to the characteristics of distributed energy grid-connected, a wind-solar-storage energy exchange control method based on a virtual synchronous generator is proposed: the output of photovoltaic / wind power generation in the two systems of wind-storage and solar-storage systems is connected in parallel with energy storage devices and inverters , the inverter device is connected to the microgrid through a "virtual synchronous generator". When considering the energy exchange between distributed energy and the entire microgrid system, a centralized-distributed hierarchical energy exchange control strategy is adopted. The lower layer control method mainly considers optical storage Separate energy exchange control mode for wind / wind storage; the upper control mode mainly considers ...

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Abstract

A wind-solar-storage energy exchange control method and system for a virtual synchronous generator, including: determining the deviation power according to the grid dispatching demand and the power output of the distributed system; supplementing the deviation power based on the control strategy of the energy switch; wherein the energy switch The control strategy includes: distributed system and centralized energy storage system control strategy. The technical solution proposed by the invention has strong practicability, can be used in micro-grid systems with different distributed energy combinations, improves the stability of power system operation, and realizes active support for large power grids.

Description

technical field [0001] The invention belongs to the technical field of grid-connected distributed power generation, and in particular relates to a wind-solar-storage-storage energy exchange control method and system for a virtual synchronous generator. Background technique [0002] At present, the global energy crisis is intensifying and the problem of climate warming is becoming more and more prominent. Under this background, the power generation technology including distributed energy has been developed rapidly. Load and grid dispatching requirements. But at the same time, there are many grid-connected inverters in the distributed generation system, which brings great challenges to the safe and stable operation of the distribution network. Considering the randomness, intermittentness, and low dispatchability of distributed energy in the microgrid system, when they are integrated into the entire microgrid system through inverters, there will be large fluctuations in voltag...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/28
CPCH02J3/383H02J3/386H02J3/28Y02E10/56Y02E10/76
Inventor 董瑞彪李国华阴昌华陈志彬刘永笑金阳药炜杨晟孙瑾张翔任健铭闫志乾李晓霞王萍蒋红音吴鸣孙丽敬赵婷
Owner CHINA ELECTRIC POWER RES INST
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