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Plug-and-play operation control method of grid-connected distributed energy storage system

A distributed energy storage and operation control technology, applied in the field of energy storage, can solve the problems of plug-and-play technology for distributed energy storage, and achieve improved economy and reliability, high communication access costs, and difficult management big effect

Pending Publication Date: 2019-09-06
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, the idea of ​​plug-and-play can be extended to energy storage power stations, but there are few related researches at home and abroad. This is the difficulty of plug-and-play technology for distributed energy storage.

Method used

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  • Plug-and-play operation control method of grid-connected distributed energy storage system

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Embodiment Construction

[0033] In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only some embodiments of the present invention, rather than all embodiments of the present invention, and it should be understood that the present invention is not limited by the exemplary embodiments described here. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative effort shall fall within the protection scope of the present invention.

[0034] The present invention is realized through the following technical solutions, as figure 1 As shown, the DC terminal of the distributed energy storage system is connected to the DC input terminal of the inverter unit, and is connected to the ...

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Abstract

The invention provides a plug-and-play operation control method of a grid-connected distributed energy storage system. Firstly a grid voltage signal and a grid frequency signal and the fault information of the distributed energy storage system are obtained, and when the grid voltage and the grid frequency are normal and the distributed energy storage system is fault-free, the power system starts up automatically; when the grid voltage and the grid frequency exceed the limit, the system enters the emergency support mode; and when the grid voltage and the grid frequency do not exceed the limit,the SOC of the distributed energy storage system is further judged so as to judge whether the distributed energy storage system enters the self-operation mode or the self-maintenance mode. The four-quadrant controllability of the power of the energy storage system is fully exerted by automatically switching the operation mode of the energy storage system so as to realize friendly interaction between the distributed energy storage system and the power grid and enhance the economy and the reliability of the distributed energy storage system.

Description

technical field [0001] The application relates to a plug-and-play operation control method of a grid-connected distributed energy storage system, which belongs to the technical field of energy storage. Background technique [0002] In the context of large-scale application of energy storage, grid-connection of energy storage systems has brought major challenges to the primary grid structure, automation control and management level of the distribution network. Off-grid-island operation-grid-connection-grid operation state switching of the energy storage system, reconfiguration of the distribution network frame during grid-connection operation, switching of different consumption modes, and primary network structure changes during off-grid and island operation, etc., which lead to Knowing the polymorphism of distribution network operation, how to realize the flexible and effective control of battery energy storage system or other controllable resources, and realize the smooth s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02J3/38
CPCH02J3/28H02J3/381
Inventor 李官军胡安平陶以彬余豪杰张宇
Owner CHINA ELECTRIC POWER RES INST
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