电测与仪表2018，Vol.55Issue(5)：1-7,7.
基于快速排序算法的模块化多电平换流器电容电压均衡策略
A capacitor voltage balancing strategy based on quicksort algorithm for modular multilevel converter
摘要
Abstract
Excessive computation is required to realize the voltage equalization using traditional algorithm,in the controller of modular multilevel converter (MMC) when existing large amount of sub-modules per arm,this will also result in a decline in the running speed of the system and even affect dynamic performance.In order to solve this problem,a capacitor voltage balancing strategy based on the quicksort algorithm is proposed.Through dividing and conquering technology,the modular capacitor voltage sequences are realized based on comparison and division.The trigger modules put into operation are decided by capacitor energy variation to realize voltage balanced.Time complexity and sort efficiency are deduced and the effect on system performance is analyzed.The adaptability of the strategy under different circumstances is researched.The DSP controller TMS320F28335 is used to measure execution time of algorithms.The MMC model is set up on the PSCAD/EMTDC and the efficiency and correctness of the voltage balancing strategy based on quicksort are proved.The simulation results show that the quicksort algorithm can reduce computation time,lower the requirement of the hardware and its advantages become more obvious with the increasement of sub-module.关键词
模块化多电平换流器/电压均衡策略/快速排序算法/时间复杂度/运行速度Key words
modular multilevel converter/voltage balancing strategy/quicksort algorithm/time complexity/system running speed分类
信息技术与安全科学引用本文复制引用
王坤,刘开培,张志轩,李威,秦亮..基于快速排序算法的模块化多电平换流器电容电压均衡策略[J].电测与仪表,2018,55(5):1-7,7.基金项目
国家自然科学基金资助项目(51607125) （51607125）
中央高校基本科研业务费专项资金支助(2042016kf1048) （2042016kf1048）
