电力系统自动化2017，Vol.41Issue(13)：150-155,167,7.DOI:10.7500/AEPS20161028005
模块化多电平换流器的电容均压算法比较及优化设计
Comparison and Optimal Design of Capacitor Voltage Balancing Algorithm Based on Modular Multi-level Converter
摘要
Abstract
The modular multilevel converter (MMC) is the core component of flexible high voltage direct current (HVDC) transmission technology, the capacitor voltage balancing of MMC determines the stable operation of transmission systems.To solve this problem, several kinds of capacitor voltage balancing algorithms based on capacitor voltage sorting are analyzed.Considering the features of capacitor voltage balancing algorithms, an improved algorithm based on the incremental capacitor voltage balancing algorithm is proposed.With only one parameter-the voltage limit introduced, this algorithm can regulate both voltage fluctuation and switching frequency.A simulation model of MMC is developed in PSACAD/EMTDC, in which all four algorithms are realized, and the theoretical analysis is proved.The results show that the proposed algorithm can greatly reduce the switching frequency.When in the same situation of voltage fluctuation, a lower switching frequency implies it is a voltage balancing algorithm of better performance.关键词
模块化多电平换流器/电容均压算法/电压上下限/开关频率调节Key words
modular multilevel converter (MMC)/capacitor voltage balancing algorithm/upper and lower limit of voltage/regulation of switching frequency引用本文复制引用
史书怀,王丰,卓放,袁乙中,朱彦霖,翟灏..模块化多电平换流器的电容均压算法比较及优化设计[J].电力系统自动化,2017,41(13):150-155,167,7.基金项目
国家高科技研究发展计划(863计划)资助项目(2015AA050606).This work is supported by National High Technology Research and Development Program of China (863 Program) (No.2015AA050606). （863计划）
