摘要
柔性配电网的可靠性直接关乎着用户的用电体验。模块化多电平换流器(modular multilevel converter,MMC)作为柔性配电网的关键设备,其可靠性问题是当前研究的热点之一。对半桥、全桥、混合型结构进行对比分析,得出了混合型MMC在实际运用中的优越性。然后详细阐述混合型MMC子模块结构、工作原理、故障阻断能力、冗余配置等,得到在设计混合型MMC时的子模块数目及比例要求。运用故障树法对其进行建模,验证了故障树法进行可靠性建模的可行性。
The reliability of flexible distribution network is directly related to the users’electricity experience.Modular Multilevel Converter(MMC)works as a key device for flexible distribution network,and its reliability is one of the hot spots in current research.This paper compares and analyzes the structure of half bridge,full bridge and mixed type,and obtains the superiority of mixed type MMC in practical application.Then,the structure,working principle,fault blocking ability and redundant configuration of hybrid MMC sub-modules are described in detail,and the number and proportion requirements of hybrid MMC sub-modules are obtained.The fault tree method is used to model it and the feasibility of reliability modeling is illustrated.
作者
艾小清
熊炜
袁旭峰
邹晓松
朱江行
AI Xiaoqing;XIONG Wei;YUAN Xufeng;ZOU Xiaosong;ZHU Jianghang(The Electrical Engineering Collage,Guizhou University,Guiyang 550025,China)
出处
《电力科学与工程》
2020年第11期15-21,共7页
Electric Power Science and Engineering
基金
国家自然科学基金资助项目(51667007)
贵州省科学技术基金项目([2019]1058
[2019]1128)。
关键词
柔性配电网
混合型MMC
可靠性建模
故障树
可行性
flexible distribution network
hybrid MMC
reliability modeling
fault tree
feasibility
