Investigation of current swell performance for three phase to ground fault on symmetrical distribution network

Updating current swell for each feeder is one of stage of fault localization considering impedance based method. Estimation formula was adopted based on impedance line and load value. This paper investigate the impact of single and paralel impedance load to the accuracy of current swell estimation in the each feeder. Three Phase to ground fault (LLLGF) was simulated using the PSCAD simulation program. The real data from TNB (Tenaga Nasional Berhad) Malaysia 132/11kV distribution network was used as the tested network. Different cable and branches are considered to the estimation formula. Due to complexity of the distribution network, it is possible to contribute different accuracy for each section. The obtained result are observed to analyze the accuracy of current swell performance. This research is very important to address fault location method on the distribution network.