摘要
Power loss management is one of the most significant challenges for reliability improvement of modular multilevel converters(MMCs).In the MMC,the bottom switch/diode in each submodule(SM)normally takes the maximum power loss.In this paper,a power loss optimization control(PLOC)for MMCs is proposed,where the maximum power losses in the bottom switch/diode of each SM can be effectively reduced through injecting optimum second-order harmonic current into the circulating current of MMCs,and accordingly the reliability of MMCs can be improved by the proposed PLOC.Simulation results with PSCAD software and experimental results with a 1 kW MMC platform are provided to confirm the validity of the proposed PLOC for MMCs.
基金
supported in part by the National Natural Science Foundation of China under Grant No.61873062
in part by the Natural Science Foundation of Jiangsu Province under Grant No.BK20180395
in part by the Six Talent Peaks Project of Jiangsu Province under Grant No.GDZB-002.
