基于自适应T-CFSFDP的MMC开路故障定位方法  

Open-circuit Fault Localization Method for MMC Based on Adaptive T-CFSFDP

作　　者：李群 邓富金 林金娇 孔欢 LI Qun;DENG Fu-jin;LIN Jin-jiao;KONG Huan(Power Grid Technology Center State Grid Jiangsu Electric Power Company,Nanjing 211103,China;不详)

机构地区：[1]国网江苏省电力有限公司电力科学研究院,江苏南京211103 [2]东南大学,电气工程学院,江苏南京210096

出　　处：《电力电子技术》2023年第8期117-122,共6页Power Electronics

基　　金：国网江苏省电力有限公司科技项目(J2021171)。

摘　　要：模块化多电平变流器(MMC)含有大量子模块(SM),及时定位开关器件发生开路故障的SM是MMC系统可靠运行的关键问题之一。这里根据故障SM和正常SM之间电容电压变化的差异性,采用基于自适应截断平均数的快速搜索与发现密度峰值聚类算法(T-CFSFDP),可有效定位MMC中的SM开路故障。所提出的故障定位方法不需要创建复杂的数学模型和手动设置经验阈值,也不需要大量的训练数据样本,可有效定位故障SM。仿真和实验结果表明,提出的基于T-CFSFDP的MMC中SM开路故障定位方法能够快速有效定位开路故障的SM。Modular multilevel converter(MMC)contains large number of submodules(SM),so timely locating SM with open-circuit fault is one of the key problems of MMC system.According to the difference of capacitance voltage changes between faulty SM and normal SM,the truncated mean clustering algorithm by fast search and find of density peaks(T-CFSFDP)is used to effectively locate open-circuit faulty SM in MMC.The proposed fault localization method does not need to create a complex mathematical model and manually set the experience threshold,nor does it need a large number of training data samples,which can effectively locate the faulty SM.Simulation and experimental results show that the proposed SM open-circuit fault localization method in MMC based on T-CFSFDP can effectively locate SMwith open-circuit fault.

关 键 词：模块化多电平变流器 开路故障定位 聚类算法 电容电压 

分 类 号：TM46[电气工程—电器]