최소자승법을 이용한 가변 윈도우 크기의 거리계전기법

Distance Relay Technique based on Variable Window Length using Least Square Error Method

this paper presents the distance relay using wavelet transform and least square error method. Wavelet transform detect the faults in the high frequency region and remove the noises in the low frequency region. The variable window length LSE determine optimal window length to each fault case and estimate fault impedance very quickly.