Abstract

Voltage quality is an important requirement of an electrical distribution system. Deviation from the nominal voltage at the consumer end has specific ranges spelt out in technical regulations. A universal approach to voltage quality improvement is the reactive power compensation. Capacitor bank used for this purpose require optimization in sizing. This study, therefore, discusses improvement of the voltage profile of 11 kV power network using capacitor bank. Power flow in the network, Ado-Ekiti 11 kV lines, was carried out using the conventional load flow equation modeling. From the analysis of the network, rated power capacitors within the range 1.185kvar- 5.644kvar is required to adequately compensate the reactive loads of the network while voltage deviation of the feeders which was within the range [(-5.9) – (-64.4)] % before the connection of the capacitor bank falls within the range [(-4.1) – (-6.8)] % after the installation of the rated power capacitor. This certainly translates to improved power quality on the network.