电力系统保护与控制2016，Vol.44Issue(11)：40-45,6.DOI:10.7667/PSPC160312
面向智能变电站的输电线路综合故障定位方法研究
Study of comprehensive transmission line fault location method for smart substation
摘要
Abstract
In a smart substation and due to the low sampling rate, travelling wave fault location cannot be applied. Therefore, a novel algorithm for transmission line fault location in smart substations is proposed. The algorithm can select the best fault location method among the conventional single-ended frequency fault location methods, and then get a value that is the closest to the fault. The conventional frequency fault location methods have various source of error, and fault location result is affected by power source, the opposite system impedance, transition resistance and other parameters. In different fault cases, every method has different location accuracy, namely the most accurate location method always varies with varying parameters. In this paper, firstly we construct a large number of training samples of transmission line fault, secondly the rough set theory is used to reduce training samples and find the intrinsic relationship between fault location and system parameters. When transmission line has a fault, this algorithm can search for the most accurate fault location method by k-Nearest Neighbor method and finally give the most credible fault distance. The results of ATP simulation and RTDS simulation show that the algorithm can successfully avoid the method of larger system error and select the optimal method and greatly improve the fault location accuracy.关键词
智能变电站/单端工频测距/属性约简/KNN 算法/RTDSKey words
smart substation/single-ended fault location/attribute reduction/KNN algorithm/RTDS引用本文复制引用
姚旭,程蓉,崔力心,拜润卿,康小宁..面向智能变电站的输电线路综合故障定位方法研究[J].电力系统保护与控制,2016,44(11):40-45,6.基金项目
国网甘肃省电力公司科技项目(522722140043)This work is supported by Science and Technology Project of State Grid Gansu Electric Power Company (No.522722140043) （522722140043）
