中国电机工程学报2017，Vol.37Issue(13)：3835-3842,8.DOI:10.13334/j.0258-8013.pcsee.162173
考虑子模块相关性的MMC可靠性分析方法
Reliability Analysis of MMC Considering the Submodule Correlations
摘要
Abstract
The majority of the existing reliability analysis methods on modular multilevel converter (MMC) did not consider the submodule (SM) correlations,which may lead to unreasonable optimal SM redundancy configuration.Therefore,there is a need to investigate the SM correlation based on MMC reliability analysis method.Firstly,the reliability model of the individual SM was provided.Secondly,considering the impact of rippling capacitor voltage and circulating currents among three phases on the service life of each SM,we selected a Copula function which fits for this specific application scenario to establish the reliability functions for all the bridge arms.Thirdly,analyzed the impact of different SM redundancy configurations on MMC reliability when considering the SM correlations.Finally,the correctness and effectiveness of all the proposed approaches were validated by calculations using Matlab.The proposed joint distribution function for each bridge arm of MMC combines the Copula function and the classic mathematical statistics methods,hence it is open for later improvements and can be seen as a theoretical support on the reliability analysis of multilevel converters used in HVDC applications.关键词
模块化多电平换流器/子模块相关性/Copula函数/可靠性分析/子模块冗余配置Key words
modular multilevel converter (MMC)/submodule correlation/Copula function/reliability analysis/submodule redundancy configuration分类
信息技术与安全科学引用本文复制引用
井皓,许建中,徐莹,赵成勇,江伟,张慧瑜..考虑子模块相关性的MMC可靠性分析方法[J].中国电机工程学报,2017,37(13):3835-3842,8.基金项目
国家电网公司科技项目资助(SGFJDK00DWJS1500031).Supported by the Science and Technology Project of State Grid Corporation of China (SGFJDK00DWJS1500031). （SGFJDK00DWJS1500031）
