Behavioral Dynamics of High Impedance Fault Under Different Line Parameters

Abstract

Predominantly the impedance faults can be classified as Low Impedance Faults (LIF) and High Impedance Faults (HIF). The LIF can be detected and protected by a conventional protective device. However, if High impedance fault occurs in the system, it is difficult to detect because of the low magnitude current. The overcurrent relay, which smartly detects the Low impedance faults, fails to detect the High impedance faults. This research work is organized as two components. In the first component some literatures regrading high impedance fault have been reviewed. In the second component classical modified several Emmanuel arc model is taken as the test system. Feeder number four is taken as the candidate feeder for testing the high impedance faults. The simulation is done through MATLAB and the results are obtained. From the results certain investigations are proposed.