When modular multi-level converter(MMC)has a large number of modules in high-voltage and high-power field,the capacitor voltage sharing algorithm of sub module is complex and the control system design is difficult.Hence,a sub module topology of distributed voltage sharing control is proposed.The sub module voltage balancing control is integrated into the sub module,which simplifies the design of system level control.The voltage sharing principle and working state of the topology are analyzed in detail,a distributed voltage sharing method based on hysteresis comparator is designed,and the selection principle of inductance parameters of the voltage sharing module is analyzed.A simulation model is built by MATLAB/Simulink to veri-fy the effectiveness and feasibility of the proposed MMC sub module distributed voltage sharing control.
关键词
模块化多电平换流器/分布式均压控制/参数设计/仿真分析
Key words
modular multi-level converter/distributed voltage sharing control/parameter design/simulation analysis
维普
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