New control scheme of on-load tap changer for voltage regulation in active distribution systems using Fuzzy logic

Abstract

This research presents a new voltage regulation philosophy that enhances the voltage magnitude in a power distribution network where distributed generation (DG) is prevalent. Voltage regulation in power distribution networks relies heavily on the On-Load Tap-Changer (OLTC) installed in power transformers. Since it was designed for networks without DG, the OLTC's current voltage regulation scheme uses a fixed reference voltage and hence cannot regulate voltage in a distribution network. Therefore, the proposed novel system-based Fuzzy logic will compute a new set point voltage that the OLTC must follow to mitigate the undesirable DG impact on the voltage profile. The suggested system is evaluated on Morocco's MATLAB/Simulink-built 20kV distribution network.