A modular multilevel converter(MMC)is suitable for high and medium voltage application.It has the advantages of low loss,high transmission efficiency,low switching frequency,low switching loss and less output har-monics.In this paper,the working principle and modulation strategy of MMC composed of half-bridge submodules are studied.The simulation model is built on the platform of MATLAB/simlink simulation software,and the simula-tion results show that the nearest level approximation modulation strategy can realize the output voltage with low har-monic content of MMC.
关键词
半桥子模块/模块化多电平变换器/高压直流输配电/最近电平逼近调制
Key words
half-bridge submodule/modular multilevel converter/HVDC transmission and distribution/nearest level approximation modulation
维普
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