Linkage protection circuit of battery energy storage system and battery energy storage system

A battery energy storage system and protection circuit technology, which is applied in the direction of emergency protection circuit devices, measuring electricity, electrical components, etc., can solve problems that affect the safe operation of the battery energy storage system, and cannot cut out faulty battery clusters in time, so as to avoid electrical damage. Effect of sticking, lowering requirements, and ensuring safe operation

Active Publication Date: 2019-09-20
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a linkage protection circuit of a battery energy storage system and a battery energy storage system to solve the problem in the prior art that it may not be possible to cut out faulty battery clusters in time and affect the safe operation of the entire battery energy storage system

Method used

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  • Linkage protection circuit of battery energy storage system and battery energy storage system
  • Linkage protection circuit of battery energy storage system and battery energy storage system
  • Linkage protection circuit of battery energy storage system and battery energy storage system

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the 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 creative efforts fall within the protection scope of this application.

[0048] see figure 2 , figure 2 It is a structural block diagram of the linkage protection circuit of the battery energy storage system provided by the embodiment of the present invention and the linkage protection circuit of the battery energy storage system. The linkage protection circuit of the battery energy storage system provided by the embodiment of the present invention includes: at least one fault detection circuit 10 and an emergency stop signal generating circuit 20, wherein, ...

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Abstract

The invention provides a linkage protection circuit of a battery energy storage system and the battery energy storage system, which are applied to the technical field of electric power systems. The circuit is provided with a fault detection circuit; after a fault of a battery cluster is detected, an emergency stop trigger signal is output to an emergency stop signal generation circuit; the emergency stop signal generation circuit outputs a first emergency stop signal to a PCS after receiving the emergency stop trigger signal; the PCS stops outputting a PWM modulation signal, so that the direct current flowing through a first direct current switch arranged in each CMU is reduced; and when the direct current meets the switch-off capability of the first direct current switch, each CMU controls the first direct current switch to be switched off. When the fault of any battery cluster is detected, the PCS stops outputting the PWM modulation signal firstly, so that the direct current flowing through the first direct current switch arranged in each CMU is reduced, the requirement for the breaking capacity of the first direct current switch is reduced, electrical adhesion in the breaking process is avoided, and safe operation of the battery energy storage system is ensured.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a linkage protection circuit of a battery energy storage system and the battery energy storage system. Background technique [0002] see figure 1 , figure 1 It is a structural schematic diagram of a battery energy storage system in the prior art. In the battery energy storage system provided by the prior art, the battery clusters 1-N are equipped with a CMU (Cluster Management Unit, battery cluster management unit), and the same BCP (Battery Collection Panel, battery cluster management unit) is connected in parallel through the CMU. Combiner cabinet), after BCP DC confluence, connected to PCS (Power Conversion System, energy storage inverter) for DC-AC conversion, and finally merged into the grid in the form of AC. Wherein, each battery cluster also includes a plurality of battery modules composed of a preset number of batteries. [0003] The CMU includes a control boar...

Claims

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Application Information

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IPC IPC(8): H02H7/18G01R31/3842
CPCH02H7/18G01R31/3842
Inventor 周俭节李金生许二超周敏童辉杨善明许大勇
Owner SUNGROW POWER SUPPLY CO LTD
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