Increase in economic activities resulting from increase in population and social advancement has led to increase in electrical energy demand. This has enlarged the burden on the existing distribution assets across Nigeria and in some cases, has caused the loading of the distribution network beyond their design limits; with consequent reduction in power quality and increased power outages in extreme cases. In this research work, Newton – Raphson (N-R) algorithm in Electrical Transient and Analysis Program (ETAP) was use to simulate and analyze Ezenei 11kV injection substation network in Delta State, Nigeria with the placement of Distributed Generation (DG) units on the network to mitigate violations. Result obtained from the power flow study showed that without the placement of DG, the total average active and reactive power losses of the system was 1492.78 kW, 3599.564 kVar and Eleven (11) buses which are Bank PHB (0.95p.u), MTN II (0.946p.u), Starcom (0.968p.u), Junuic Hostel (0.945p.u), Victor Odogu (0.946p.u), Anambra Palace (0.945p.u), MTN I (0.95p.u), Chief Osita (0.953p.u), Best Garden (0.95p.u), Victor Hotel (0.954p.u) and L.C. Okeke (0.957p.u) load buses were within the voltage limit out of the sixty – seven (67) buses in the network. When DG was placed on the network, distribution line loss reduced by 53.67% (1492.8kW, 3599.6kVar to 691.63kW, 748.62kVar) and five (5) buses which are Starcom (93.2%), MTN I (93.3%), Achalla Ibusa (93.3%), Ministry of Trans. (93.3%) and Land survey (93.6%) out of the Sixty Seven (67) load buses violated the statutory voltage limit.

Full text: IJEIR_2484_FINAL.pdf