谐振接地电网单相接地故障选线研究  

Detecting Single-Phase-to-ground Faulted Feeder in Resonant Grounded Power Distribution System

作　　者：陈奎[1] 唐轶[1] 孟庆海[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2006年第1期104-108,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金资助项目(50077022)

摘　　要：本文详细分析了补偿电网单相接地故障时零序电流的分布,在此基础上提出了一种新的接地选线方法——基于自身零序电流偏移积分的互差之绝对值和的极大值选线法.该方法在计算各线路故障判据时充分利用了所有线路的故障信息,使故障线路的判据约为非故障线路的n倍,有效地拉大了二者之间的差距,提高了保护的可靠性.运行情况证明,本方法有效地提高了谐振接地电网单相接地故障选线的准确性.Distribution of zero-sequence current in resonant grounded power distribution system with a single-phase-to-ground fault is analyzed. Based on the analysis, a new fault detecting method for the resonant grounded power system is proposed. In this method, the faulty data of all lines are fully used to calculate the values of faulty criterions of each line, making the criterion value of faulted line be n times of that of non-faulted line, which effectively increases the difference between them, greatly improving the reliability of protection. The result indicates that this method can effectively improve the accuracy of the fault detection in a resonant grounded power distribution system.

关 键 词：单相 接地故障 小电流 接地电网 接地选线 

分 类 号：TM773[电气工程—电力系统及自动化]