Applications of digital power simulators: advantages

This paper emphasises the advantages of using a digital power simulator, including the CVT (capacitive voltage transformer), for testing the high voltage numerical distance protections. The different faults which may occur in a power system are generated by the simulator MORGAT. The TMS simulator is first used to deal with the investigations on the applied methodologies as well as the asymptotic behaviour of the system under study. MORGAT is used once again for the last stage to test the protection performances. That is the common and one of the best ways for obtaining time response improvements.