基于C型行波检测法的配电网单相接地故障点定位方法  

Location Method of Single-Phase Grounding Fault Point in Distribution Network Based on C-Type Traveling Wave Detection Method

作　　者：赵东耀 唐子衿 ZHAO Dongyao;TANG Zijin(Central Information College of Tianjin University of Technology,Tianjin 300380,China)

机构地区：[1]天津理工大学中环信息学院,天津300380

出　　处：《通信电源技术》2022年第3期56-58,75,共4页Telecom Power Technology

摘　　要：由于配电网线路上存在分支点,在单相接地故障定位时容易误认伪故障点,因此提出基于C型行波检测法的配电网单相接地故障点定位方法。通过小波包变换分析故障信号,计算信号的暂态能量,据此确定故障发生的具体线路;利用C型行波法在故障线路一端发射行波,根据故障特征波往返时间确定具体故障点位置。计算节点特征波的能量变化值,实现配电网单相接地故障点的精准定位。实验结果表明,所提方法应用下,配电网单相接地故障点定位误差较小。Because of branch points on the distribution network cable,the false fault point is likely to be mistakenwhen locating the single-phase grounding fault.Therefore,a method of locating single-phase grounding fault point in distribution network based on C-type traveling wave detection method is proposed.The fault signal is analyzed by wavelet packet transform,and the transient energy of the signal is calculated to determine the specific line where the fault occurs.C-type traveling wave method is used to transmit traveling waves at one end of the fault line,and the location of specific fault points is determined according to the round-trip time of fault characteristic waves.Calculate the energy change value of node characteristic wave,and realize the accurate location of single-phase grounding fault point in distribution network.The experimental results show that,with the application of the proposed method,the positioning error of single-phase grounding fault point in distribution network is small.

关 键 词：小波包变换 C型行波检测法 配电网 单相接地故障 故障点定位 

分 类 号：TM7[电气工程—电力系统及自动化]