Control method and device of energy storage system

A technology of an energy storage system and a control method, which is applied to systems for storing electrical energy, charging/discharging secondary batteries, and charge balancing circuits, etc., can solve the problems of lack of a control method for balance among clusters of energy storage systems, and improve power output. ability, the effect of reducing the power limit

Active Publication Date: 2019-04-12
GUANGDONG POWER GRID CO LTD +1
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  • Application Information

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Problems solved by technology

[0005] The embodiment of the present application provides an energy storage system control method and equipment, which solves the technical problem that the existing equalization methods are all aimed at the SOC balance of the battery cells in the cluster, and lack a control method for the energy storage system inter-cluster balance.

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  • Control method and device of energy storage system
  • Control method and device of energy storage system
  • Control method and device of energy storage system

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Embodiment Construction

[0066] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0067] Firstly, an energy storage control system provided in the embodiment of the present application will be described.

[0068] See figure 1 , figure 1 It is a schematic structural diagram of an energy storage control system provided in an embodiment of the present application. Among them, each battery cluster and bidirectional DC / DC converter constitute the ...

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Abstract

The embodiment of the invention discloses a control method of an energy storage system, which comprises the following steps: acquiring a system power instruction; determining the charge/discharge state corresponding to the system power instruction; if the charge/discharge state corresponds to the charge state, entering the charging distribution logic, wherein the charging distribution logic includes: allocating a corresponding charge power reduced cluster power instruction for a battery cluster having a SOC value higher than an average SOC value, and allocating a corresponding charge power increased cluster power instruction for the battery cluster having a SOC value lower than the average SOC value; if the charge/discharge state corresponds to the discharge state, entering the dischargingdistribution logic, wherein the discharging allocation logic includes: allocating a corresponding discharge power increased cluster power instruction for a battery cluster having a SOC value higher than an average SOC value, and allocating a corresponding discharge power reduced cluster power instruction for the battery cluster having a SOC value lower than the average SOC value. The method solves the technical problem that the existing equalization methods are all aimed at the SOC equalization of the battery cells in the cluster and there is lack of a control method for the inter-cluster equalization of the energy storage system.

Description

technical field [0001] The present application relates to the technical field of energy storage control, in particular to an energy storage system control method and equipment. Background technique [0002] Due to the complex structure of a large-capacity energy storage system, the energy storage units in it are usually clustered and managed, even if the batteries are connected in series to form a high-current and high-voltage battery cluster, and each battery cluster further constitutes the entire storage system. energy system. [0003] In order to improve the durability, reliability and safety of the energy storage system, in addition to the state of charge SOC balance between the battery cells in the battery cluster, for the overall energy storage system, it is also necessary to achieve SOC balance. Especially when the power output demand of the energy storage system is close to or even exceeds the rated power of the energy storage system, if the SOC among the battery c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J15/00H02J7/00H01M10/42H01M10/44
CPCH01M10/4207H01M10/441H01M10/446H01M2010/4271H02J7/0014H02J15/00Y02E60/10
Inventor 易斌赵伟
Owner GUANGDONG POWER GRID CO LTD
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