This paper describes important steps when developing relays models inside a real time simulator. These relays models, as the differential element inside real time simulators, can improve the dependability of the tests. In the present paper a commercial transformer differential element model is described. In order to compare the model response to the real relay, the last was connected to the real time simulator. Also to enhance the range of the tests it was tested a built-in differential model existent in the simulator library. All kind of daily situations for a protection relay was tested including inrush and internal faults to the power transformer. The simulations were performed with RTDS.
F. Magrin, M.C. Tavares, In Proc. International Conference on Power Systems Transients (IPST2015), Cavtat, Croatia, June 2015
KEYWORDS: Protection relay, Differential element, Model, Real time simulation, RTDS