SIMULATION OF MHO CHARACTERISTICS FOR TRANSMISSION LINE PROTECTION USING PSCAD

Modeling of protective relays offer an economical and feasible alternative to investigate the performance of relays and protection systems. In this paper MHO characteristics and Bergeron model type transmission line are modelled and simulated using PSCAD/EMTDC software. To study the performance of the relay characteristics, single line to ground fault at different locations with various fault resistances are considered. A Fast Fourier Transform block in PSCAD/EMTDC has been used to extract the fundamental component. The test network used in this paper is 220kv transmission line system.