IIARD International Institute of Academic Research and Development

International Journal of Engineering and Modern Technology (IJEMT )

E-ISSN 2504-8848
P-ISSN 2695-2149
VOL. 11 NO. 3 2025
DOI: 10.56201/ijemt.vol.11.no3.

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Power Flow Study of Urban Center Distribution System for Grid Enhancement

Chizindu Stanley Esobinenwu

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Abstract

This paper deals with load flow study of 11kV distribution network in New GRA, Port Harcourt, Rivers state, Nigeria, with aim of grid enhancement in the network through reactive power compensation. The simulation is carried out using Newton Raphson method embedded in ETAP software. It is achieved by running a load flow of the existing 11KV distribution network, determining the losses from the load flow. Minimizing the determined losses in the distribution network by the penetration of capacitor banks. Analytical technique was used for sizing of the capacitor banks. Then, validating the percentage of loss reduction, and enhanced voltage profile in the distribution network with and without the injection of capacitor banks. The results obtained show that the base case network real and reactive power loss is 59.32kW and 78.91KVAr respectively. But, at the instant of penetrating 100KVar capacitor banks each into bus 5, bus 10 and bus 13, the real and reactive power losses reduced to 26.8kW and 31.012KVAr respectively. This indicate that when a capacitor bank (300KVAr) is injected into the system, the real power loss reduces by 55% while reactive power reduces by 60%. All the transformers maintain good loading conditions and voltage profile of all the buses fall within +5% variation as stipulated by IEEE.

keywords:

Newton Raphson, Electrical Transient Analyzer Program, Capacitor Bank

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