典型小电流接地故障实例及暂态选线分析

目前对小电流接地故障特征的理论分析已较完善,但缺乏对现场典型小电流接地故障实例的认识及利用典型实例对选线技术的验证。本文介绍了暂态选线方法及原理,并根据现场选线装置实际记录的典型故障实例波形,分析并总结了典型接地故障的发生原因、故障特征及对暂态选线结果的影响。通过对现场典型小电流接地故障实例的分析与总结,有利于提高对现场典型接地故障特征的认识,验证暂态选线装置的可靠性。

Analysis of Typical Single-phase Earth Faults and Transient Faulty Feeder Selection Technology in the Non-solidly Earthed System

The fault characteristic theoretical analysis in the non-solidly earthed network is almost complete. But the understanding of the typical field faults and the verification of the faulty feeder selection technologies by field faults data are in great demand. The transient faulty feeder selection technologies are introduced. According to the typical field faults waveforms, the cause of the typical field faults, the fault characteristic and the effect on the result of the transient faulty feeder selection technologies are analyzed. By analyzing and summarizing the typical field faults, the understanding of the typical field faults can be improved. The reliability of the transient faulty feeder selection technologies can be verified.