Advancement in Radial Power Distribution Network Using High impedance fault Relay

This paper proposes the method of high impedance fault (HIF) detection in radial distribution network. The proposed method makes use of sequence component values of fault current for HIF state detection and all sequence components of fault current are retrieved by using sequence component analysis. The performance of method is evaluated by inducing high impedance fault at different nodes on the IEEE-6-bus radial balanced distribution system. As over-current relay is not able to detect HIF state therefore this scheme effectively utilized the negative and zero sequence components in conjunction with over-current relay for HIF detection. The presence of negative sequence current component along with zero sequence current components in the network confirms the occurrence of HIF fault and relaying control signal is generated. This scheme is cost effective and it is simulated in a simulation environment. This method is fast as it detects the fault within one cycle and reliable.