Effects of Capacitor Bank Installation in a Medium Voltage (MV) Substation

Abstract

Several medium voltage  substations, often called 33/11kV injection substations in Nigeria, are being run in electric utility companies without installing capacitor banks. Research has shown that the inclusion of capacitor bank improves system power factor and efficient running of the power system.This paper presents a brief description of the theory of power factor and its importance in achieving power system control and stability. Possible implications of substations without capacitor bank installations were also itemised. A schematic diagram of Ajangbadi 2X15MVA 33/11kV injection substation in Eko Electricity Distribution Company, Nigeria, is presented as a case study. A flowchart of the algorithm used to determine substation and network load parameters was developed and implemented. All results obtained and the necessary conclusions are presented.

Keywords: Medium voltage, Injection Substation, Capacitor Bank, Power factor, Load parameters.