Ferroresonance Mitigation Device in Voltage Transformers with a Flyback based Resistor Emulator

A widely configurable and scalable resistor emulator actively mitigates the ferroresonance phenomenon. This paper proposes a new variety of mitigation equipment based on power electronic converters operated as resistor emulators. The presence of a ferroresonance activates a flyback converter operating in the critical conduction mode (CrCM) with no specific output voltage control. The severity of the resonance configures the emulated resistance value. Results show a fast and effective response of the proposed device in comparison with the state-of-the-art solutions