Applied Mathematics & Information Sciences

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The frequent occurrence of ferroresonance phenomenon has destructive effects in distribution systems. The jump resonance accompanied by harmonics can be effectively mitigated using a nonlinear component. The upcoming memristor technology is applied in this work to control the ferroresonance in an inductive voltage transformer, which is used in a distribution substation. Due to non- commercialization of memristors, an emulator in the form of an electrolytic cell is developed. The set-up uses saturated copper sulfate (CuSO4) solution as the electrolyte and copper electrodes having different cross sectional areas. Nonlinearity is realized in the form of the pinched hysteresis loop in the developed memristor emulator. The required memristance is obtained by using a proper design of the CuSO4 set-up. The nonlinear resonance is indicated by the sudden jump up of 30 V and jump down of 15 V in the secondary winding of the transformer. The current-voltage relation of the emulator is compared with that of an ideal memristor under normal and ferroresonance conditions. The behavior of CuSO4 memristor is validated against the HP memristor experimentally in terms of nonlinearity index and phase shift values.

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