Protection of Overhead Transmission Line from the Direct Lightning Strike Fault by using Different Identification Methods

Abstract

-The transmission line outages occurs due to the direct lightning strike fault. It is good to study on the identification of direct lightning strike fault for the efficient and relevant repair, which is meaning full to overhead transmission line protection. In this paper, firstly we can focus on the lightning current of phase wires at the observation points of view. Secondly, according to their drawback, another method is introduced. In which, the first method to find the lightning strike fault by using 1.Rogowski coil is introduced. Then 2.Wavelet transform, 3.hilbert transform, 4.Modeling of substation shielding, 5. Travelling wave protection, 6. Using surge arresters, 7.Mahalanobis distance protection method, 8. S-Transform method is explained.