Protection devices testing based on power-hardware-in-the-loop simulation

Low-voltage circuit breakers are vital elements in order to insure the low-voltage power systems security. As nowadays the loads connected in these power systems are characterized by a strong non-linearity, inrush currents or high harmonic pollution can cause circuit breakers false tripping. In this context, it is necessary to study the interaction between these newer loads and the protection devices. Thus, this paper deals with a new test procedure for switching devices, based on power hardware-in-the-loop real-time simulation. The goal of this procedure is the test of a real circuit breaker while the power system is emulated by the real-time simulator. The new test procedure was validated via experimental test.