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  •   Chinweike Innocent Amesi

  •   Tekena Kashmony Bala

  •   Anthony O. Ibe

Abstract

This paper examined the power flow status of the Port Harcourt Town (Zone 4) distribution networks to improve the performance. The network consists of 18 injection substations fed from 4 different sizes of transformers with a total power rating of 165 MVA, 132/33kV at the Port Harcourt Town sub-transmission substation. Gauss-seidel power flow algorithm was used to analyse the network in Electrical Transient Analyzer Program software (ETAP 12.6) to determine the various bus operating voltages, power flow, and over or under-loaded Transformers’ units. From the base-case simulation results obtained, it shows that these injection distribution transformers (PH Town 106.3%, RSU 90.5%, Marine Base 86.5%, UTC 87.9%, Nzimiro 89.5%, and Borokiri 88.7%) were overloaded on the network and the operating voltages observed for (PH Town 95.1%, RSU 83.0%, Marine Base 83.4%, UTC 82.8%, Nzimiro 85.2%, and Borokiri 82.1%) indicates low voltage profile. However, using network reconfiguration technique as proposed in this paper; there was reduction in the percentage loading of the said Transformers as it was upgraded to affect positively on its lifespan with (PH Town 44.1%, RSU 65.3%, Marine Base 60.7%, UTC 47.3%, Nzimiro 61.3%, and Borokiri 52.0%) loading,  and the bus voltage profiles was improved for (PH Town 100%, RSU 98.4%, Marine Base 98.8%, UTC 98.2%, Nzimiro 98.6%, and Borokiri 99.1%) with additional facilities. It is recommended that the power infrastructure facilities in Port Harcourt Town distribution network be immediately upgraded to reduce losses and improve the electricity supply to consumers. Also, in regard to these analyses, the sub-transmission substation requires 240 MW of power for effective power delivery.

Keywords: Distribution Networks, ETAP Software, Gauss-Seidel Power Flow Method, Network Reconfiguration

References

R. Uhunmwangho, and E. K. Okedu, “Electrical power distribution upgrades: Case of towns in Akwa-Ibom State, Nigeria,†International Journal of Applied Engineering Research, no. 3, pp. 1833- 1840, 2008.

N.A. Hachimenum, “Power outages in Port Harcourt city: Problems and solutions,†Journal of Electrical and Electronic Engineering, Vol. 10, no.2, pp.59-66, 2015.

S. Apoorva, “Load-flow analysis of radial distribution network with reduced data preparation,†Master Thesis, Thapar University, Patiala, 2008.

M. Begovic, B. Milosevic, and D. Novosel, “A novel method for voltage instability protection,†A paper presented at the 35th IEEE Annual International Conference on System Science, pp.802-811, Hawaii, 2002.

R. S, Reddy and T. G. Manohar, “Review on voltage stability phenomenon and importance of FACT control in power system environment,†Global Journal Researches in Engineering Electrical Electronics, Vol.12, 2012.

R. Kapahi, “Load flow analysis of 132kV substation using etap software,†International Journal of Scientific & Engineering Research, vol. 4, pp. 25-30, 2013.

K, Porate, K. L. Thakre, and G.L. Bothe, “Voltage stability enhancement of low voltage radial distribution network using static VAR compensator,†WSEAS Transaction on Power Systems, vol.4, pp.32-40, 2009.

R. Vivek, and T. Sumit. (June 2012). “Modelling, simulation, analysis and optimization of a power system network: Case study,†International Journal of Scientific & Engineering Research, [Online] 3(6), pp.1-9. Available: https://www.ijser.org/researchpaper/Modeling-Simulation-Analysis-and-Optimisation-of-a-Power-System-Network-Case-Study.pdf

V. Srividya, “Optimum capacitor placement in radial distribution system using dijkstra algorithm methods,†Enriching Power and Energy Development, pp.1-9, 2013.

A. Hamouda, and K. Zehar, “Improvement of the power transmission of distribution feeders by fixed capacitor ban,†Acta Polytechnica Hungarica, Vol. 4, pp.47-62, 2007.

A. Metia and S. Ghosh, “A literature survey on different loss minimization techniques used in distribution network,†International Journal of Scientific Research and Education, Vol.3, pp. 3861-3877, 2015.

Z. Li, C. Wu, J. Chen, Y. Shi, J. Xwng and A.Y. Wang, “Power distribution network reconfiguration for bounded transient power loss,†IEEE PES ISGT, Asia, 2012.

N. Rugthaicharoencheep and S. Sirisumrannukul, “Feeder reconfigurations for loss reduction in three phase distribution system under unbalance loading condition,†2010.

P.V. Rao and S. Sivangaraju, “Radial distribution network reconfiguration for loss reduction and load balancing using plant growth simulation algorithm,†International Journal on Electrical Engineering and Informatics, Vol. 2, 2010.

H. Saadat, Power system analysis, New York: Tata McGraw-Hill, 2006.

B. R. Gupta, Power system analysis and design, Allahabard: Wheeler publishing, 2006.

P. N. Ede, O.B. Owei, and C.I. Akarolo, “Does the greater Port Harcourt master plan meet aspirations for livable city? Greater Port Harcourt Master Plan,†47th ISOCARP Congress, 2008.

ETAP 12.6, Electrical Transient Analyzer Program.

PHEDC, “Daily substations reportâ€, Port-Harcourt Electricity Distribution Company Limited, unpublished, 2015

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How to Cite
[1]
Amesi, C., Bala, T. and Ibe, A. 1. Impact of Network Reconfiguration: Case Study of Port-Harcourt Town 132/33kV Sub-transmission Substation and Its 33/11kV Injection Substation Distribution Networks. European Journal of Electrical Engineering and Computer Science. 1, 1 (1). DOI:https://doi.org/10.24018/ejece.2017.1.1.4.