中国电力2018，Vol.51Issue(5)：1-9,9.DOI:10.11930/j.issn.1004-9649.201711180
具有直流故障阻断能力的混合型模块化多电平换流器
Hybrid Topology of Modular Multilevel Converter with DC Fault Blocking Capability
摘要
Abstract
When reverse blocking MMC (RBSM-MMC) topology process fault current at DC side,huge overvoltage occurs in the lower tube reverse blocking IGBT.The block needs to meet very high pulse blocking consistence requirement in order to avoid components burning down due to huge overvoltage across IGBT.A hybrid model of RB and HB MMC (RB-HBSM-MMC) is proposed to resolve the problem of fault blocking capacity of traditional MMC and RBSM-MMC triggering consistence and spike voltage.Based on analysis of hybrid topology structure and fault blocking mechanism,a double-ends MMC-HVDC system is set up on PSCAD/EMTDC simulation platform.Simulation result shows that proposed RB-HBSM-MMC can effectively block DC-side fault current and isolate fault.Compared to RBSM-MMC,RB-HBSM-MMC can realize both effective blocking of DC-side fault current and transfer transient spike voltage to resolve overvoltage,reduce technical requirement for consistence of system triggering.It has good prospect of application.关键词
模块化多电平换流器/逆阻型/混合拓扑/故障清除/触发同步性/高压柔性直流输电Key words
modular multilevel converter/reverse blocking/hybrid topology/fault clearance/trigger synchronization/high voltage flexible DC transmission分类
信息技术与安全科学引用本文复制引用
罗映红,许义佳,史彤彤,刘运华..具有直流故障阻断能力的混合型模块化多电平换流器[J].中国电力,2018,51(5):1-9,9.基金项目
国家自然科学基金资助项目(51667013).This work is supported by the National Natural Science Foundation of China (No.51667013). （51667013）
