Performance Analysis Project of OCR and DGR Protection Settings on Tristex Feeder of New Substation Using Digsilent Power Factory Software

Abstract

Increasing the reliability of the electricity system is very important in maintaining a stable and guaranteed electricity supply. One important factor in the electrical protection system is the setting of over current relay (OCR) and directional ground relay (DGR) settings. This study aims to analyze and evaluate the performance of the OCR and DGR protection settings on the New Pandaan Tristex Substation using DIgSILENT software. The method used in this      research is modeling and simulation using DIgSILENT software. Relevant data and electrical system parameters are obtained from reliable sources. OCR and DGR protection settings are evaluated by considering protection needs through simulation analysis of fault conditions and normal operation. Tristex feeder is one of the feeder in GI New Pandaan with a total length of 2.415 km. The calculation results for the OCR setting on the incoming 20 kV side obtained for the TMS value = 0.20 while for the OCR setting on the 20 kV feeder side obtained the TMS value = 0.15. Then for the DGR setting on the incoming 20 kV side, the TMS value = 0.26 is obtained, while for the DGR setting on the 20 kV feeder side, the TMS value = 0.10 is obtained.