Development of a Digital Motor Universal Management Relay Simulator

In this paper a new interactive simulation environment is proposed for protective relay design and evaluation as well as for protective relay testing. The salient features of a motor universal management relay such as different protective devices as well as control, monitoring, communication could be designed and evaluated in this software environment. It could serve as a standalone tool to relay designers both from hardware and software points of view. It is developed by MATLAB/Simulink Ver. 6.5, Release 13. In this version, the Power System Blockset is replaced bySimPowerSystems enabling to simulate almost any circuit with the phasor simulation feature. The simulation time is reduced dramatically with this method; hence, the efficiency of the relay simulation has been increased considerably