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Improvement of Power Supply in Distribution Network : A Case Study of Okporo, Rumuodomaya and Woji Substation, Nigeria.

Nwachukwu Kingsley, D. C. Idoniboyeobu, S. L. Braide, T. K. Bala

Abstract


The study examines the improvement of Power supply in the distribution network of Okporo, Rumuodomaya and Woji of Rivers State, Nigeria. Power supply to the station is via two (2) 132kV transmission station namely Port Harcourt mains duly linked to Afam power station and Omoku power station. The network is modelled in Electrical Transient Simulation software (ETAP19.1) and load flow of the network is examined using Newton-Raphson technique. The result obtained from the pre-upgrade network simulation shows that the following buses: Aba Rd (89.41%), Agip (89.41%), Eligbolo (88.46%), FGC (88.46%),  Okoh Rd (89.41%), Rukpokwu (88.46%), violate the statutory limit condition of 0.95-1.05p.u. Similarly, over loaded transformers are T8 (104.30%) and T9 (123.30%) with total real and reactive power losses are 284.9kW and 317.4kVAr. However, a cost effective optimization techniques is used to improve the network and the operating values after optimization for the buses and transformers are Aba Rd (98.18%), Agip (98.18%), Eligbolo (98.18%), FGC (98.18%), Okoh Rd (98.18%), Rukpokwu (98.18%), while the transformers are T8 (44.203%) and T9 (51.823%). The total real and reactive power loss after optimization is 224kW and 226kVAr. From the result obtained, it is evident that the proposed optimization techniques impacted significantly in the improvement of the distribution network.


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References


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