电力系统自动化2011，Vol.35Issue(16)：94-98,104,6.
模块化多电平换流器子模块故障特性和冗余保护
Redundancy Protection for Sub-module Faults in Modular Multilevel Converter
摘要
Abstract
The operation mechanism of modular multilevel converter（MMC） is described.Different kinds of sub-module faults in MMC are analyzed,which may cause the oscillations of DC voltage and current and finally cause the outage of the converter.Different redundancy protection methods（RPMs） to deal with sub-module faults in cascaded H-bridge converter are compared,and then a new RPM suitable for sub-module faults in MMC is proposed.In this method,one or few redundant sub-modules are put in hot stand-by state in order to replace fault sub-module rapidly,while the others are in cold stand-by blocking state so as to protect the insulated gate bipolar translators（IGBTs） from current flowing in them.Time-domain simulation results show that the proposed RPM enables MMC based voltage source converter based high voltage direct current（VSC-HVDC） system to recover from sub-module faults without interruptions of power delivery.关键词
电压源换流器型直流输电/模块化多电平换流器/故障分析/冗余保护/电容电压均衡Key words
voltage source converter based high voltage direct current（VSC-HVDC）/modular multilevel converter（MMC）/fault analysis/redundancy protection/capacitor voltage balancing分类
信息技术与安全科学引用本文复制引用
管敏渊,徐政..模块化多电平换流器子模块故障特性和冗余保护[J].电力系统自动化,2011,35(16):94-98,104,6.基金项目
国家科技支撑计划重大项目 （）
