Study On Self-adaptive Distance Relay Based On Wavelet Artificial Neural Network

With the increasing of electric voltage grade, requirement of line protection ishigher and higher, some new rationales and technology have appeared. This paperputs forward a scheme of transmission line adaptive distance relay based on waveletneural network. This scheme is different form tradition distance relay, it needn'tcalculation of line resistance, using sampling data and training off-line, adaptivelyacting for various shorting fault of line. This scheme includes three parts: faultdetection, fault location and single-phase adaptive re-closure. The simulative testresults show that the scheme can identify the fault line and fault type correctly, thencomplete fault location function.