经消弧线圈接地系统单相接地故障选线研究

分析了注入变频信号选线原理存在选线误判现象的不足，并通过仿真进行了验证。在找到了引起选线误判根本原因的基础上，提出了一种改进方法，主要是对选线判据的改进。通过仿真可知，该判据保证了无论是短线路还是长线路发生单相接地时均有较高的选线精度。

Study on fault feeder detection for single-phase-to-earth fault in compensated distribution network

This paper analyzes the shortcoming of the method of injecting various frequency current. By simulation,it is proved that misoperation phenomenon indeed exits. To avoid misopera-tion,a new criterion to detect fault feeder is presented after finding the ultimate reason resulting in misoperation. The criterion can assure high precision for fault feeder detection when single-phase-to-earth happens on long feeder or short feeder.