Computerised Dynamic Testing of Protective Relays: Development of Relay Test Bench for Testing of Overcurrent Relays

摘要

This paper reports a computerised dynamic relay test bench developed for testing of over current relays. This set is capable of producing 3-phase transient current signals that correspond to the actual fault events in the power system. Facilities are provided to generate fault transients either by simulating faults, using alternative transient program (ATP) or by replaying the records of digital fault recorder (DFR). Facilities are also provided to generate harmonic current signals through computer by software programming with user selectable magnitude and phase. This approach offers improved testing facilities over existing system of relay testing.