摘要
通过结合故障录波数据和高压配电线路架空、电缆分布参数及其阻抗参数,并对阻抗法加以改进从而实现实用化。利用基于小波变换及突变量法相结合提取故障特征时刻并选出故障线路,获取故障电压和电流数据,进而针对不同故障情况对微机故障测距原理进行变换定位故障点位置。经验证表明,该方法能够较为精确地定位故障区域,极大地改善目前输电线路故障点查找定位的现状,并且精度满足现场运行检修要求,有较强的实用性。
The impedance method is improved by combining the fault recording data with overhead cable distribution parameters and impedance parameters of high voltage distribution lines.Based on wavelet transform and mutation method,fault feature time is extracted and fault lines are selected to obtain fault voltage and current data,and then the fault location principle of microcomputer is transformed and located according to different fault conditions.It has been proved that this proposed method can locate fault areas accurately,greatly improve the present situation of fault point locating of transmission lines,and meet the requirements of field operation and maintenance with strong practicability.
作者
卢圣财
吴旭鹏
许菲菲
沈良
俞玲
王闻燚
张森
徐梓源
LU Shengcai;WU Xupeng;XU Feifei;SHEN Liang;YU Ling;WANG Wenyi;ZHANG Sen;XU Ziyuan(State Grid Songjiang Power Supply Company,SMEPC,Shanghai 201600,China)
出处
《电力与能源》
2020年第3期312-315,332,共5页
Power & Energy
关键词
电力网
输电线路
微机故障测距原理
故障录波数据
线路参数
power grid
transmission lines
principle of microcomputer fault ranging
fault recording data
circuit parameters
