电力系统自动化Issue(2)：106-111,6.DOI:10.7500/AEPS20130821005
模块化多电平换流器子模块拓扑仿真分析
Simulation Analysis on Submodule Topology of Modular Multilevel Converter
摘要
Abstract
Despite extensive concern of researchers and wide application in direct current (DC) transmission and energy conversion,the modular multilevel converter(MMC)with a new topology is incapable of clearing the DC link faults because of its semi-bridge submodular topology.An improved hybrid topology utilizing the reverse voltage clamping of forward diodes and capacitor charge effect is designed to solve the unidirectional charge problem without the need to change the control and voltage balancing algorithm.By investigating the different current charge paths,the current blocking coefficient is defined as the ratio between arm equivalent DC voltage and alternating current (AC) voltage magnitude to indicate the blocking effect.The self-excited startup procedure is also designed according to the capacitor voltage in the uncontrollable rectifying process.The effectiveness of this topology is verified by MMC simulation results.关键词
模块化多电平换流器/高压直流输电/复合拓扑/电流抑制系数/自励启动Key words
modular multilevel converter(MMC)/high voltage direct current transmission/hybrid topology/current blocking coefficient/self-excited startup引用本文复制引用
张建坡,赵成勇,郭丽..模块化多电平换流器子模块拓扑仿真分析[J].电力系统自动化,2015,(2):106-111,6.基金项目
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 High Technology Research and Development Program of China (863 Program)(No.2013AA050105) （863计划）
