黄灿英  杨墉金  宁珍 

（江西建设职业技术学院，江西 南昌，330200）

摘要：现有的配电网单相接地故障定位方法易受扰动因素和定位线路距离限制的影响，在实际应用中定位结果与实际故障位置偏差较大，且定位时间较长，影响配电网故障排除效率。为此，提出基于暂态信号的配电网单相接地故障区段自动定位方法。首先，对配电网单相接地故障暂态信号进行分析，获得故障区段的暂态信号；然后，获取故障区段暂态信号对应的时域特征；最后，对故障进行定位计算。仿真对比实验表明，该文提出的方法有效提升了故障位置的定位精度，缩短了故障位置的定位时间，具有较好的稳定性。

关键词：单相接地故障；暂态信号；配电网；自动定位

中图分类号：TM773             文献标志码：A          文章编号：1674-2605(2023)06-0004-07

DOI：10.3969/j.issn.1674-2605.2023.06.004

Automatic Positioning Method of Single-phase Ground Fault Section of Distribution Network Based on Transient Signal 

HUANG Canying  YANG Yongjin  NING Zhen 

(Jiangxi College of Construction, Nanchang 330200, China)

Abstract: The existing methods for locating single-phase grounding faults in distribution networks are highly susceptible to the combined influence of disturbance factors and distance limitations of the positioning lines. In practical applications, the positioning results obtained deviate significantly from the actual fault location, and the positioning time cost is too high, seriously affecting the overall efficiency of normal fault removal and maintenance in distribution networks. In order to solve the problem of positioning deviation and shorten the fault location time, the transient signal of single-phase grounding fault in the distribution network is analyzed to obtain the transient signal of the fault area; Obtain the corresponding time-domain characteristics of transient signals in the fault section; Perform localization calculations on its faults. The data obtained through simulation and comparative experiments indicate that the proposed method can quickly and accurately locate the fault location, effectively improve the accuracy of fault location, and shorten the positioning time of fault location under the same length and distance. It has good stability and has the value of large-scale promotion and in-depth research.

Keywords: single-phase ground fault; transient signal; distribution network; automatic positioning