Dynamic characteristic test of protective relay for double circuit using real time digital simulator (RTDS)

Dynamic characteristics of the digital distance relay and PCM current differential relay are described in this paper. It is difficult to achieve various fault simulation using conventional static type tests, while RTDS can handle not only various fault modeling but also dynamic characteristic test modeling because it is a full digital and real time simulator. Thus, this paper describes a test procedure, using RTDS, to verify the high possibility of malfunction cases for the distance relay and PCM current differential relay. In this paper, test modeling is established and then simulation for this test model is performed with RTDS. The results are compared with the ones calculated by PSS/E and by hand calculation.