标题：Synchrophasors covariance index-based fault section location for active distribution networks
作者：Shi, Zhixiong ;Liu, Shu ;Wang, Shanshan ;Liu, Yang
作者机构：[Shi, Zhixiong ] State Grid Shanghai Municipal Electric Power Company, Shanghai; 200437, China;[Wang, Shanshan ;Liu, Yang ] School of Electrical and E 更多
会议名称：14th IEEE Conference on Industrial Electronics and Applications, ICIEA 2019
会议日期：19 June 2019 through 21 June 2019
来源：Proceedings of the 14th IEEE Conference on Industrial Electronics and Applications, ICIEA 2019
关键词：Active distribution networks; Covariance index; Fault detection; Fault section; Phasor measurement unit
摘要：We intend to introduce the statistic inference into to the fault diagnosis in active distribution networks. In this respected, we propose a real-time fault detection and fault section identification by computing the comprehensive covariance index and confidence intervals of monitored buses. In the method, the historical data set is chosen from historical operation synchronization data that have representative operational states and thus avoid priori knowledge of networks. Generalized eigenvalue analysis is then performed to find the directions with maximum variance deviation in the monitored period versus the historical operation period. For the fault section location purpose, a comprehensive covariance index and confidence intervals are proposed to evaluate overall monitored nodes' state. The validity and practicability of the proposed method are verified by the simulation results of IEEE 34 modified system. © 2019 IEEE.