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适用于电压源换流器型高压直流输电的模块化多电平换流器最新研究进展
引用本文:韦延方,卫志农,孙国强,孙永辉,滕德红.适用于电压源换流器型高压直流输电的模块化多电平换流器最新研究进展[J].高电压技术,2012,38(5):1243-1252.
作者姓名:韦延方  卫志农  孙国强  孙永辉  滕德红
作者单位:河海大学可再生能源发电技术教育部工程研究中心,南京,210098
摘    要:模块化多电平换流器(modular multilevel converter,MMC)为多电平换流器家族中的一员,其技术特点非常适用于电压源换流器型高压直流(voltage source converter high voltage direct current,VSC-HVDC)输电领域。为了分析MMC的最新研究进展,首先介绍了MMC的拓扑电路及其工作原理,分析了其技术特点和应用领域,比较了其相对于传统2电平和3电平VSC拓扑的优势所在。然后分别从MMC的数学模型、调制策略、子模块电容均压、预充电、内部环流、控制方面、换流阀试验以及其在VSC-HVDC系统中的工程应用等方面,回顾了MMC目前在国内外的最新研究进展和工程应用现状,并指出了MMC自身的缺点和今后亟待研究的关键问题。已有的研究表明,MMC在电力系统中有着广阔的应用前景,是未来高压直流输电技术的一个重要发展方向。

关 键 词:模块化多电平换流器(MMC)  电压源换流器(VSC)  高压直流(HVDC)  数学模型  调制策略  电容均压  预充电  环流

New Prospects of Modular Multilevel Converter Applied to Voltage Source Converter High Voltage Direct Current Transmission
WEI Yanfang,WEI Zhinong,SUN Guoqiang,SUN Yonghui,TENG Dehong.New Prospects of Modular Multilevel Converter Applied to Voltage Source Converter High Voltage Direct Current Transmission[J].High Voltage Engineering,2012,38(5):1243-1252.
Authors:WEI Yanfang  WEI Zhinong  SUN Guoqiang  SUN Yonghui  TENG Dehong
Affiliation:(Research Center for Renewable Energy Generation Engineering,Ministry of Education, Hohai University,Nanjing 210098,China)
Abstract:The modular multilevel converter(MMC) is a member of multilevel converter family,and is suitable for being applied in multilevel converter topology for voltage source converter high voltage direct current(VSC-HVDC) transmission due to its many advantages.To review the recent advances in the area of MMC technology,which has half bridge terminology,we firstly introduced the topology circuit,operating principle,technical characteristics and application fields of MMC,then analyzed the advantages of MMC by comparing with two level and three level VSC converter,and described the latest research and engineering application status of MMC,especially the research of mathematical model,modulation strategy,capacitor voltage balancing,precharge,circulating current,control,valves test,and the application in VSC-HVDC.Finally,we put forward the disadvantages and key issues to be urgently solved of MMC for the future.It is shown that MMC has extensive application prospect and is one of an important development direction for power HVDC transmission in future.
Keywords:modular multilevel converter (MMC)  voltage source converter (VSC)  high voltage direct current (HVDC)  mathematical model  modulation strategy  capacitor voltage balancing  precharge  circulating current
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