摘要
针对模块化多电平换流器(modular multilevel converter,MMC)的可靠性分析通常忽略控制模块与子模块间的相关性,首先基于子模块拓扑分析,建立单个子模块与控制模块的可靠性模型;然后考虑MMC同一桥臂各子模块以及控制模块使用寿命之间的相互影响,依据Copula理论多变量联合概率分布函数构造方法,选取符合特殊应用场景下的Copula函数;其次考虑所有模块间相关性前提并结合k/n(G)模型建立MMC可靠性分析模型;最后以上海南汇柔性直流输电示范工程为例分析了运行年数、相关程度、必备子模块数量及冗余子模块数量不同情况下MMC可靠性的变化规律.结果表明,该模型能较好地满足MMC可靠性评估要求,可为MMC拓扑设计和冗余配置提供必要的信息.
As the reliability analysis for modular multilevel converter(MMC)usually ignores the correlation between control module and submodules.Firstly,the reliability model of single submodule(SM)and control module is established based on submodule topology analysis.Secondly,considering the interaction of the service life between the SMs and control module,this paper selects the Copula function in accordance with the special application scenario according to the construction method of Copula theory multi-variable joint probability distribution function.Thirdly,taking into account the premise of the correlation of all modules,the MMC reliability analysis model is established with redundant configuration based on k/n(G)model.Finally,taking the flexible DC transmission project in Nanhui Shanghai as an example,the variation law of MMC reliability under different conditions of operation years,correlation degree,requisite SM count and redundant SM count are analyzed.The results show that the model can meet the MMC reliability assessment requirements better and provide the necessary information for MMC topology design and redundancy configuration.
作者
郑文迪
许启东
邵振国
周腾龙
李怡馨
曾祥勇
ZHENG Wendi;XU Qidong;SHAO Zhenguo;ZHOU Tenglong;LI Yixin;ZENG Xiangyong;无(School of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Fujian Smart Electrical Engineering Technology Research Center,Fuzhou 350108,China;Hunan Electric Power Design Institute Co.Ltd,China Energy Engineering Group,Changsha 410007,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第12期108-116,共9页
Journal of Hunan University:Natural Sciences
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)。
