部分接入电池储能系统的模块化多电平换流器控制方法OACSTPCD
Control Method of Modular Multilevel Converter with Partly Integrated Battery Energy Storage System
部分接入电池储能系统的模块化多电平换流器(MMC with partly integrated BESS,MMC-PBESS)可以在接入储能的同时节约建造成本,但其控制更加复杂.针对下桥臂接入储能电池的MMC-PBESS拓扑,建立数学模型及等效电路.在此基础上给出电容电压均衡策略,提出了上/下桥臂分控的控制策略,并分析了其运行边界.在MATLAB/Simulink平台搭建仿真模型,仿真了不同交直流功率比例的运行工况,所提控制策略可以在维持电容电压平衡的同时实现对电池充电的功能.该策略无需额外的环流计算,上下桥臂控制解耦,简单灵活.
The modular multilevel converter with partly integrated battery energy storage system(MMC-PBESS)can save construction costs while connecting energy storage,but its control is more complicated.For the MMC-PBESS topology where the lower bridge arm is connected to battery energy storage,a mathematical model and an equivalent circuit are established.On this basis,a capacitor voltage balancing strategy is given,a control strategy for upper/lower bridge arm separate control is proposed,and the operation boundary is analyzed.A simulation model is built in MATLAB/Simulink platform to simulate the operation conditions of different AC to DC power ratios.The proposed control strategy can achieve the battery charging function while maintaining the capacitor voltage balance.This strategy does not require additional circulation calculations,and the upper and lower bridge arm control is decoupled,making it simple and flexible.
韩雪;贺荣栋;凌志斌
上海交通大学电力传输与功率变换控制教育部重点实验室,上海市 200240
电池储能系统模块化多电平换流器桥臂电容电压均衡
battery energy storage system(BESS)modular multilevel converter(MMC)bridge armcapacitor voltage balance
《电力系统自动化》 2024 (001)
100-108 / 9
国家自然科学基金资助项目(52277221);国家电网公司科技项目(SGFJDK00DWJS2200026);已申请国家发明专利(申请号:CN202210857441.8). This work is supported by National Natural Science Foundation of China(No.52277221)and State Grid Corporation of China(No.SGFJDK00DWJS2200026).
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