电力系统保护与控制2024，Vol.52Issue(16)：1-11,11.DOI:10.19783/j.cnki.pspc.231432
基于MMC的分布式储能系统及其快速SOC均衡控制策略
Distributed energy storage system based on MMC and rapid SOC balancing control strategy
摘要
Abstract
To improve the energy utilization of distributed energy storage systems(DESS)based on modular multilevel converters(MMC),it is crucial to address the state of charge(SOC)balance of energy sub-modules(ESM).To address the limitations of existing SOC balance control strategies,a fast SOC balance control strategy based on internal and external hierarchical control is proposed.The outer layer aims to address the SOC differences between upper and lower arms or phase legs.To achieve this,this paper proposes improving the model predictive control(MPC)of MMC,in conjunction with adaptive equalization coefficients,to rapidly adjust power imbalances.The inner layer introduces an adaptive virtual resistance approach.Based on the SOC of ESM,the dominant ESM is determined,and the virtual resistance of each unit is adjusted adaptively to generate a corresponding voltage gradient.Combined with the MMC sorting algorithm,the ESM are allocated power according to their respective SOC,thereby achieving fast SOC balance and improving the energy utilization of DESS.A simulation model is built in Matlab/Simulink to demonstrate the effectiveness and feasibility of the proposed control strategy.关键词
模块化多电平换流器/分布式储能系统/模型预测控制/荷电状态/虚拟电阻Key words
modular multilevel converter/distributed energy storage system/model predictive control/state of charge/virtual resistor引用本文复制引用
马文忠,孙伟,王玉生,张文艳,李恒硕,朱亚恒..基于MMC的分布式储能系统及其快速SOC均衡控制策略[J].电力系统保护与控制,2024,52(16):1-11,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.52277208). 国家自然科学基金项目资助(52277208) （No.52277208）
