电池2024，Vol.54Issue(6)：782-787,6.DOI:10.19535/j.1001-1579.2024.06.005
考虑电池SOC均衡的直流电网储能
Direct current grid energy storage considering SOC balance of batteries
摘要
Abstract
With the practical application of module multi-level series energy storage devices in direct current power grids,the reliability requirements for series submodules are increasing day by day.Compared with traditional voltage source converter(VSC)converter stations,the reliability of multi-stage series energy storage equipment depends on the reliability of power modules and batteries.By simulating the operating conditions of sub-modules containing batteries through operational tests,the reliability of sub-module design can be verified.The topology and basic principles of direct current power grid energy storage equipment are firstly analyzed,the traditional communication structure is introduced.Then,the topology structure and logic control method of the operating test platform are proposed,a closed-loop current control strategy considering battery state of charge(SOC)balance between the valve tower sub-modules is studied.Key test items are sorted out.Finally,a circuit model is built on the MATLAB-Simulink simulation platform.The simulation results show that the SOC difference between different submodules of the same valve tower is within 1%,which meets the requirements of long-term high current operation test for valve tower.关键词
直流电网/储能/运行试验/电池荷电状态(SOC)均衡Key words
direct current power grid/energy storage/operational testing/battery state of charge(SOC)balance分类
信息技术与安全科学引用本文复制引用
曾繁礼,王玮伦..考虑电池SOC均衡的直流电网储能[J].电池,2024,54(6):782-787,6.基金项目
国家自然科学基金项目(GZ221047) （GZ221047）
