DETECTION OF FAULTS IN OVERHEAD LINES USING DISCRETE WAVELET TRANSFORM

Abstract

Fault detection is a primary concern in isolation of faults. The present protective relaying systems used for fault detection are not precisely functioning which may lead to entire system shut down. The necessity to improve performance of present protective schemes used in power systems is rapidly increasing due to the drastic changes in power system working environment. This work shows a strategy for fault detection in overhead systems using discrete wavelet transform by overcoming the problems faced in conventional methods. This strategy utilizes just fault current estimations toward one side of the overhead line to detect the faults. The sufficiency of proposed technique is analyzed under a different fault conditions using technical computing tool. The results obtained are encouraging and also it is found out that the accuracy in proposed fault detection methodology has increased considerably.