Ferroresonance Mitigation in an Inductive Voltage Transformer Using Memristor Emulator

The development of advanced digital technologies often struggle in their promising performances. The failure report of a substation includes the performance of instrument transformers definitely. The overvoltages and overcurrents developed during transients especially ferroresonance, marked the degrading performance of a voltage transformer though it has a suppression circuit. Memristors are nonlinear resistors capable of remembering their previous resistance, which might help to replace the system resistors in many applications. In this paper, this hopeful technology of the future has been attempted to mitigate the ferroresonance phenomenon of inductive voltage transformers. A single phase 100 VA, (11kV/√3)/ (110V/√3) Inductive Voltage Transformer (IVT) was used to analyze the ferroresonance performance. The jump up and down phenomenon observed was the indicator of the ferroresonance inception. An overvoltage of 1.34 pu was developed and suppressed using a memristor emulator successfully. The mitigation results of the memristor emulator proved its better performance when compared with that of a linear resistor.