A Study on the Algorithm for Fault Discrimination and Location in Underground Transmission Lines Using Travelling Wave and Wavelet Transform

Wavelet 변환과 진행파를 이용한 지중송전선로 고장종류 판별 및 고장점 추정에 관한 연구

Recently, electrical demands increase rapidly in metropolitan areas according to the extension of urban areas. Therefore underground transmission lines are getting expanded. This paper presents the rapid and accurate algorithm for fault discrimination and fault location in underground transmission lines. This paper uses fuzzy logic method using voltage and zero sequence for fault discrimination. And this paper uses travelling wave and wavelet transform for fault location. To prove the performance of the algorithm, it test algorithm with signal obtained from ATPDraw simulation.