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Double multilevel power limiting protection method based on frequency modulation energy storage system

A technology of power limitation and energy storage system, applied in safety/protection battery circuits, arrangement of multiple synchronous batteries, electric vehicles, etc., can solve the problems of easy disconnection, long maintenance time, high maintenance cost, and reduce maintenance costs , Reduce the number of manual maintenance, improve the effect of stable operation performance

Active Publication Date: 2019-01-04
SHENZHEN CLOU ELECTRONICS
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a dual multi-level power limit protection method based on frequency modulation energy storage system to solve the technical problems of long maintenance time, high maintenance cost and easy tripping in the existing frequency modulation energy storage system

Method used

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  • Double multilevel power limiting protection method based on frequency modulation energy storage system
  • Double multilevel power limiting protection method based on frequency modulation energy storage system
  • Double multilevel power limiting protection method based on frequency modulation energy storage system

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Embodiment Construction

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention, and similar component numbers in the drawings represent similar components. Apparently, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0051] figure 1 An embodiment of the frequency modulation energy storage system of the present invention is shown. In this embodiment, the frequency modulation energy storage system includes an AGC control system layer, an energy storage monitoring system layer, a medium voltage box system layer, and a battery box system layer, wherein the medium voltage box system ...

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Abstract

The invention discloses a dual multi-level power limiting protection method based on frequency modulation energy storage system, which comprises the following steps: a battery management system BMSijobtains battery parameters, the battery parameters include SOCij, and transmits SOCij to an energy storage converter PCSij; The battery management system determines a target alarm and acquires and executes a preset alarm power restriction strategy corresponding to the target alarm. The centralized control equipment KQi calculates SOCi according to SOCij, and the energy storage monitoring system calculates SOC according to SOCi. A preset power limit processing strategy is executed when the SOC exceeds A1, or when the SOC does not exceed A1 and the SOCi exceeds A2, or when the SOCi does not exceed A2 and the SOCij exceeds A3, or when the SOCij does not exceed A3 and the SOCij exceeds A4. The dual multi-level power limiting mechanism of the invention not only reduces the maintenance cost, butalso improves the operation stability performance of the frequency modulation energy storage system.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a dual multi-level power limit protection method based on a frequency modulation energy storage system. Background technique [0002] In the process of performing frequent and repeated charge and discharge operations on the battery stack of the battery management system in the existing frequency modulation energy storage system, especially in the final stage of charging and discharging, the battery parameters of the battery stack in the battery management system change The rate is very fast, for example: the rate of voltage change is very fast, so it is prone to over-voltage or under-voltage, over-current and other situations. [0003] In order to prevent the battery stack from being under the condition of overvoltage, undervoltage or overcurrent, etc., the battery stack needs to be protected. The existing protection strategy is: when the battery stack has overvoltage, u...

Claims

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Application Information

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IPC IPC(8): H02J7/00
CPCH02J7/0026
Inventor 但助兵邓荣钦袁虎容海林
Owner SHENZHEN CLOU ELECTRONICS
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