Three Phase Voltage Correction Device Using Muti-Winding Transformer

Abstract

This paper presents a three phase voltage correction device (TPVCD) using multi-winding transformer (MWT). The device can provide balanced 3 phase power supply of desired voltage to critical consumer equipments even when the grid voltage is varying and unbalanced. The device uses a special winding and switch arrangement to emulate MWT tap changing. The MWT tap settings are dynamically adjusted using a voltage correction scheme to obtain the desired voltage. The capability of the device is verified by simulations studies under voltage imbalance scenario due to unbalanced loads in the distribution network.