T接输电线路故障测距的行波算法

Fault Location Algorithm Based on Travelling Wave Theory for Three-terminal Transmission Lines

针对T接输电线路故障测距问题,将行波故障测距方法应用于T接输电线路故障。首先进行故障分支的判定,其次,把复杂的三端输电线路通过运算化简为比较简单的双端输电线路,然后利用双端行波故障测距的方法进行故障测距,得到故障的位置。同时在行波测距装置中增加行波波形记忆模块、使用较高的采样精度,确保双端行波测距的可行性。

Aiming at problem of fault location algorithm for three-terminal transmission lines faced by relay engineers,this paper applied the travelling wave method of fault location to three-terminal transmission lines.Firstly,the fault branch was decided,then,through the operation the complicate three-terminal transmission lines were simplified to simpler two-terminal transmission lines,finally,the fault position could be found by the way of two-terminal transmission lines based on travelling wave theory.At the same time,memory blocks for wave pattern、higher sampling precision are added in the fault location equipment,so that the feasibility could be ensured for the fault location of two-terminal transmission lines.