中压配电网单相接地故障暂态定位技术综述

Review of Single-phase Grounding Fault Location Based on Transient Signals in Medium Voltage Distribution Network

中压配电网单相接地故障定位技术,是提高配网供电可靠性的关键。为全面剖析定位算法研究现状,本文从故障暂态信号定位原理、现有定位装置启动方法、装置和信号对时及同步问题三个方面进行了阐述,并对其特点进行分析。针对暂态信号定位方法,主要分析了暂态无功功率法、行波法、暂态信号相关法和基于数学信息处理的综合定位法。然后在此基础上结合配电网发展趋势及用户对供电可靠性的要求,探讨了未来配电网故障定位技术的研究方向和发展前景。

The key to improving power supply reliability lies in single-phase ground fault location based on transient signals in medium voltage distribution network.The paper comprehensively explores the review of single-phase ground fault location algorithm from three aspects:the fault transient signal localization principle;the existing locating device boot method;timing and synchronization.And its characteristic has been pointed.Transient reactive power,traveling-wave,transient signal correlation,synthetic location based on synthetic location Mathematical message processing are mainly analysed.Combined with development of distribution network and power supply reliability,direction for the future research and prospects of grounding fault location in distribution network are discussed.