基于电流极性比较的主动配电网故障定位方法  

Current polarity comparison based fault location for active distribution network

作　　者：庞清乐 刘昱超[2] 李希年 孙静 王深茏[2] PANG Qingle;LIU Yuchao;LI Xinian;SUN Jing;WANG Shenlong(School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266520,China;School of Information and Electronic Engineering,Shandong Institute of Business and Technology,Yantai 264005,China)

机构地区：[1]青岛理工大学信息与控制工程学院,山东青岛266520 [2]山东工商学院信息与电子工程学院,山东烟台264005

出　　处：《电力系统保护与控制》2018年第20期101-108,共8页Power System Protection and Control

基　　金：国家自然科学基金项目(61472227;61403236);山东省教育厅科技发展规划项目(J15LN10);烟台市科技计划项目(2016ZH055)~~

摘　　要：馈线终端单元在主动配电网发生故障时实现对配电网的主动控制,需要简单有效的控制算法。因此,提出了基于电流极性比较的主动配电网故障定位方法。该方法采用馈线终端单元实时检测故障电流,将电流突变时刻作为故障起始点,记录故障后半个周波数据,并计算其极性。通过比较相邻检测点故障电流的极性,实现故障定位。仿真和现场验证结果表明,该方法在主动配电网发生相间短路故障和单相接地故障时均能实现准确的故障定位。The feeder terminal unit controls the distribution network actively when a fault occurs in the active distribution network,it requires a simple and effective control algorithm.So a fault location method based on current polarity comparison for active distribution network is proposed.In this method,the feeder terminal unit detects fault currents in real time,the abrupt change moment is taken as the fault starting moment.The fault current of half cycle is stored from the fault starting moment and its polarity value is calculated.Fault location is realized by comparing the fault current polarity of adjacent detection points.Simulation and field verification results show that the proposed method can achieve accurate fault location under phase-to-phase short-circuit faults and single-phase-to-ground faults in active distribution network.

关 键 词：主动配电网 故障定位 电流极性比较 馈线终端单元 

分 类 号：TM75[电气工程—电力系统及自动化]