The real-time simulator for protective relays testing using MATLAB/Simulink software

The submitted paper presents a tester designed for testing the protective relays in work conditions close to the real. The device is a simulator operating in real-time of the phenomena taking place in the modeled part of power system. The paper describes the construction (including hardware and software aspects) and operation principle of designed simulator. The MATLAB/Simulink software has been used for modeling the test systems (as parts of the whole power system). Paper includes some example results of distance relay tests performed using designed simulator. In addition, the opportunities for further development of both hardware and software parts of the simulator have also been presented.