摘要
针对当前多分支线路故障测距中方法较复杂,精确度不够高的不足,提出一种基于小波变换的T型输电线路精确故障定位算法。该算法利用电流行波到达T接线三端时间差与故障点距离T接线三端长度差的关系,只需初始行波电流信息即可确定故障支路,并对故障定位。在T节点附近不存在故障测距死区,且不受故障类型、分布电容、行波速度等因素的影响。大量Matlab仿真结果表明,该算法简单精确,能够满足故障定位的要求。
Considering the deficiency of location faults on T-connection transmission lines, a new method based on wavelet transform is presented. In this paper, using the relationship between time difference and distance difference, the fault circuit is firstly identified by the information of the initial current transient traveling waves, and then the fault location is solved.This method does not have a dead area when fault occurs near the T-connection point, and is not affected by the speed of current transient and distributed capacitance. A large amount of MATLAB simulations show that this proposed method has high accuracy and it can meet the fault location requirement.
出处
《电力系统保护与控制》
CSCD
北大核心
2010年第2期8-11,33,共5页
Power System Protection and Control
关键词
T接线
故障测距
时间差
距离差
初始电流暂态行波
小波分析
T-connection
fault location
time difference
distance difference
initial current transient traveling waves
wavelet analysis
