电力系统自动化Issue(3)：52-58,7.DOI:10.7500/AEPS20130627003
一种模块化多电平换流器的子模块优化均压方法
An Optimized Method for Balancing Sub-module Voltages in Modular Multilevel Converters
摘要
Abstract
The sub-module”s (SM”s) capacitor voltage balancing problem of modular multilevel converters (MMCs) is one of the technical difficulties demanding prompt solution in the MMC engineering application.In contrast to the traditional voltage balancing method which uses the sorting results of SM capacitor voltages according to the direction of the arm current,this paper proposes an improved and optimized method by introducing the double holding factor to reduce the switching frequency and losses.Meanwhile,the voltage balancing strategy of packet sorting is adopted in the proposed method to maintain the relative balance of energy between the SMs by introducing the energy balancing factors on the premise of ensuring normal operation of MMC.The optimized voltage balancing method has realized reduction of the sorting operand and improvement of the capacitor voltage sorting speed.The model of MMC with ten SMs is realized by PSCAD/EMTDC,with both correctness and effectiveness of the proposed method verified by simulation results.关键词
模块化多电平换流器/子模块/电压均衡/保持因子/能量均衡因子/分组排序Key words
modular multilevel converter (MMC)/sub-module (SM)/voltage balancing/holding factor/energy balancing factor/packet sortin g引用本文复制引用
陆翌,王朝亮,彭茂兰,赵成勇,裘鹏..一种模块化多电平换流器的子模块优化均压方法[J].电力系统自动化,2014,(3):52-58,7.基金项目
国家自然科学基金资助项目(51177042) （51177042）
国家高技术研究发展计划(863计划)资助项目(2013AA050105)。This work is supported by National Natural Science Foundation of China(No.51177042)and National High Technology Research and Development Program of China(863 Program)(No.2013AA050105) （863计划）
