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Loss Reduction in Port Harcourt 33/11kv Distribution Networks By Power Factor Correction Eseosa, Omorogiuwa; Mik, Kesiena
International Research Journal of Management, IT & Social Sciences Vol 2 No 9: September 2015
Publisher : International Journal of College and University (IJCU)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21744/irjmis.v2i9.73

Abstract

Poor power factor often result to high losses of active power in the network. It measures the percentage of apparent power that can be used to do actual work by the loads. However, this result in reduction of systems reliability and creates safety problems and a much increased energy cost. These inductive loads include induction motors, transformers, and reactors and they have negative effect on the actual power used up by the loads. In this paper, Power factor correction (PFC) has been done by the addition of the needed capacitance to counteract the inductive load which is present in the electrical network of Port Harcourt distribution system. The load values, MVAr values and the existing power factor of Port Harcourt electricity network where used to derive the needed shunt capacitance to a most appropriate value of 0.95. This enabled current savings of 23.15 percent in all the 11kV buses as well as reducing the required MVA needed to feed the loads to 101.48MVA as against 132.07MVA when the power factor was 0.73. These reductions were achieved by adding a capacitance of 34.48MVAr and the current reductions reduce losses along the lines since the square of current is proportional to losses. Also the added system capacity will mean that more loads can be fed by the system when the added capacitance brings the system to a power factor of 0.95. 
Proposing Utilization of Photovoltaic (PV) Source into Power Distribution Network Using University of Port Harcourt as a Case Study Eseosa, Omorogiuwa; Wariboko, Noel Iloayira
Journal of Robotics and Control (JRC) Vol 2, No 4 (2021): July (Forthcoming Issue)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

Relying on Power Holding Company of Nigeria (PHCN) for power distribution in University of Port Harcourt (Uniport) has not really helped in satisfying the overall power requirements, considering the fact that alternative renewable sources of power exist in its environs and tapping into it will help ameliorate these challenges. This work involves proposing utilization of photovoltaic (PV) source into power distribution using Uniport as a case study. Solar radiation profile was obtained as latitude 40o48.1 oN and longitude 6o55.9oE with average clearance index of 4.37kwh/m2/day. Solar altitude, angle of incidence, azimuth, global solar value in kw/m2 were recorded as well as models for PV, battery bank and converter components formulated. Moreso, sensitivity and optimization studies including systems architecture, load and PV output for the solar network was carried out. User specified variables such as appliance peak power, total energy produced/consumed per day, total amount to be invested as well as lifespan of solar generating plant. Overall cost of solar PV amounted to about Two billion, seven hundred and forty million, six hundred thousand naira (N2, 740,600,000) for a twenty-four (24) hour power supply. Operation and maintenance cost for a projection of twenty-five (25) years (OPEX was also determined to be Ninety-six million, five hundred thousand naira (N96, 500,000:00). At 25 years, amount that must have been spent on bills to PHEDC for consuming maximum of ten (10) hours of electrical power is about Seven billion, eight hundred and sixteen million, three hundred and thirty-one thousand, one hundred naira (N 7,816,331,100:00). This implies that if Uniport decides to jettison PHEDC for the next twenty-five (25) years and want to be sure of a guaranteed 24 hours’ power supply, it would have saved a total of Five billion, and seventy-five million, seven hundred and thirty-one thousand, one hundred naira (N5,075,731,100:00). Furthermore, generated power by this design is 7500MWhr but the load consumed in a year is 7100MWhr/year given an excess used power of 400MWhr/year. This excess power can be sold thereby creating extra profit for the institution.