Abstract
Modern day AC power systems are proliferated by the introduction of several kinds of nonlinear loads which generate harmonics in a power system and this has a cumulative negative effect on power quality. Examples of nonlinear loads are power electronic devices, which cause distortion of voltage and current waveforms and consequently create a number of harmonics within the power system. This paper presents the estimation of Total Harmonic Distortion (THD) of the Distribution lines in the 33kV distribution network of Island Business District, Eko Electricity Distribution Plc, taken as a case study using a set of busbar voltage results, obtained from previous studies on power flow and harmonic analyses of each time of the 33kV feeder restoration. The harmonics and their impedances on each line at the scenario time of the 33kV feeders restored are presented. The estimated THD of each line and overall network average THD are also presented. http://dx.doi.org/10.4314/njt.v34i4.15
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