A simple real-time simulator for protection devices testing

The submitted paper presents the design of a simple real-time simulator devoted to protection devices tests, whose the operation principle is based on closed feedback loop. The device is the result of a series of scientific projects carried out at the the Protection and Control Laboratory of IEn-PW. The construction, the issues related to the operation principle along with some results of tests performed on the designed simulator are presented in the paper. The software part is based on MATLAB/Simulink package including libraries, while the hardware part consists of measurement cards installed in PC computers, a CMS156 amplifier and a dedicated matching circuit. The last section of the article contains a brief description of the expected possible improvements of the simulator in the future.