摘要
模块化多电平换流器(modular multilevel converter,MMC)的可靠性关系到直流输电系统的安全稳定运行。文中首先基于MMC单个子模块可靠性模型的分析,利用拉丁超立方采样及Cholesky分解排序法产生计及子模块可靠性相关的场景;然后,在产生子模块相关性场景的基础上,利用极大似然估计理论得到3种Copula函数的相关系数,并利用最短欧式距离选取最优的Copula函数;其次,基于MMC子模块组合关系图及Copula理论,建立了计及子模块相关性的MMC可靠性分析模型。最后,以上海南汇工程为例验证了所提方法能满足MMC可靠性分析要求。
Reliability of modular multilevel converter(MMC)is related to the reliable and stable operation of HVDC system.First,based on the analysis of MMC single SM reliability model,the scenario related to the submodule(SM)reliability is generated by using Latin Hypercube Sampling(LHS)and Cholesky decomposition sorting.Then,the correlation coefficients of three kinds of Copula functions are obtained by using the maximum likelihood estimation theory(MLE)on the basis of generating SM correlation scenario,and the shortest Euclidean distance is used to select the optimal Copula function.After that,the MMC reliability analysis model considering the SM correlation is set up.Finally,the Shanghai Nanhui project is taken as an example to verify that the proposed method can meet the MMC reliability analysis requirements.
作者
许启东
郑文迪
邵振国
周腾龙
XU Qidong;ZHENG Wendi;SHAO Zhenguo;ZHOU Tenglong(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Fujian Smart Electrical Engineering Technology Research Center,Fuzhou 350108,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第11期76-83,共8页
High Voltage Apparatus
基金
国家自然科学基金资助项目(51777035)
福建省自然科学基金资助项目(2017J01480)。
