TESTING AND EVALUATION OF DISTANCE CARRIER COMMAND PROTECTION FUNCTION IN NUMERICAL DISTANCE PROTECTION RELAY TOSHIBA GRZ200

Abstract

Distance carrier command protection (DISCAR) provides exchange operational information mutually of every distance protection relay using a communication system, the accurate decision of whether or not a fault is internal on the line can be made. The paper provides the necessary background knowledge of a secondary circuit system with a DISCAR function of distance protection relay Toshiba GRZ200 and configures the relay by using a GR-TIEMS, Multi-Pro software. Then, the distance protection zones, permissive overreach protection scheme POP on a 171 overhead line at 110kV substation Tam Ky is simulated and evaluated by using a distance module tool in test universe software of Omicron CMC 356 test set when occurs a single phase, two phase and three phase short circuits. The results of the article show that the whole length of the line can be protected promptly for an internal fault. It will help researchers and operators gain test experience and enhance their acquired knowledge to serve the analysis, reporting and determine the correct cause of the theory and experiment.