VOLTAGE MAGNITUDE IMPROVEMENT: A CASE STUDY OF NIGERIAN 330kV TRANSMISSION SYSTEM

Abstract

Voltage magnitude improvement on power system is important for effective power delivery to consumers. In this study, voltage magnitudes of buses on Nigerian 330kV Transmission System were determined using the Newton-Raphson Power Flow solution method. Buses with low voltage magnitudes were identified. Appropriate shunt capacitor bank ratings in Mega-Volts Ampere (MVA) were determined and installed on the buses with voltage magnitudes that violate limits. It was discovered that the the injection of appropriate MVAr ratings on the buses improved the bus voltage magnitude to fall within acceptable range. Power system losses on the Nigerian 330kV Transmission System were also considerably reduced.