Browsing by Author "Ganiyu Adedayo Ajenikoko"

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    Development and Testing of Q-Basic Computer Software for Newton-Raphson Power Flow Studies
    (Institute of Electrical and Electronics Engineering (IEEE), 2019-09-01) Lambe Mutalub Adesina; James Katende; Ganiyu Adedayo Ajenikoko
    There had been obvious system insecurity in Nigerian power systems’ grid which often lead to frequent power system collapse. Studies have shown that the Privatized power companies that emanated as a result of power sector reform carried out recently in Nigeria are not fully on ground in network argumentation, planning and analysis of the network. For example, it is required that for any proposed capital project execution which would add to the existing Networks; certain analysis via system simulation need to be carried out. Such analysis would display the likely situation after the project is completed and commissioned. These analyses include investigating the bus voltage profile, power flow, losses, overvoltage condition etc. Consequently, this paper presents a development of Q-basic computer software package on Newton- Raphson power flow algorithm and subsequent testing on a 3 - Bus power system network with known solutions. Steady state operating conditions of busbars, generation, branch power flows and circuit system losses were determined. The obtained results are presented and discussed. These results are accurate and reliable, because they agree with the known solutions of the network. Conclusions are drawn, and necessary recommendations are presented.
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    Impact of Power Distribution Feeder’s Contributions to Reliability Indices
    (Impact Journals., 2019-11-27) Ganiyu Adedayo Ajenikoko; Lambe Mutalub Adesina; Olusoji Simeon Olaniyan; Yaqub Adunfe Kosiru
    System reliability is the ability of the power system to provide an adequate supply of electrical power at a desired time without interruption. Reliability indices are the parameters used for a comprehensive assessment of electrical power systems reliability. This study employed System Average Interruption Duration Index (SAIDI), System Average Interruption Frequency Index (SAIFI) and Customer Average Interruption Duration Index (CAIDI) as reliability indices to analyze the impact of power distribution feeder’s contribution to system reliability indices. Ten distribution feeders were selected from Kaduna and Kano distribution feeders and computed using appropriate mathematical relations. In addition, a comprehensive comparative analysis of these feeders were made to evaluate their reliability levels. The results show that mean SAIDI for Kaduna and Kano distribution systems were 0.0012 and 0.0007, respectively. This shows that Kano distribution systems is comparatively less reliable compared to Kaduna distribution systems due to prolonged period of interruptions recorded on most of the feeders attached to the systems. The mean SAIFI for Kaduna and Kano distribution systems were 0.0032 and 0.0.0016, respectively. This indicates that most of the customers attached to Kaduna distribution system feeders were served dequately compared to Kano distribution system feeders even though most of the faults recorded on Kaduna were cleared on time, thus making Kano distribution system to be relatively less reliable. Kaduna and Kano distribution systems have mean CAIDI contributions of 0.0054 and 0.0032, respectively. The result shows that fewer of the customers attached to Kano distribution system were adequately served, as a result of prolonged interruptions recorded on the system, while many of the customers attached to Kaduna distribution feeders were adequately served, which is evident from low level of faults on the distribution system. The findings from this study provide a basis for power system engineering for planning and maintenance strategies.
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    Newton-Raphson Algorithm for Power Flow Solution and Application
    (International Journal of Information Processing and Communication (IJIPC), 2020) Lambe Mutalub Adesina; Ogunbiyi Olalekan; Ganiyu Adedayo Ajenikoko
    Power system insecurity often lead to frequent power system collapse. Experience has shown that power utility companies are generally poor in network argumentation and planning. For example, it is required that any new project must be simulated to ascertain its effects in the network prior to construction. The simulation could be investigating the bus voltage profile, power flow, losses, overvoltage condition etc. Consequently, this paper presents a Newton-Raphson algorithm for power flow solution and the application of the developed Q-basic computer software package to a large power system network. It involves formulation of algorithms and development of flowcharts which were used to determine the steady state operating conditions of buses, generation, branch power flows and circuit system losses of the case study network considered. The results obtained are presented and discussed. The fast convergence of the system at fifth iteration confirmed the effectiveness of the software and accuracy of the results. Having previously tested the software with a known solution network and work fine, suggest the results obtained are accurate and reliable. Transmission lines with high reactive power needs installation of equipment capable of reducing the reactive power. Buses with voltage value a little less than acceptable standard needs improvement.
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    Newton-Raphson Algorithm for Power Flow Solution and Application
    (Faculty of Communication and Information Engineering, University of Ilorin, Ilorin, 2020-05-01) Lambe Mutalub Adesina; Olalekan Ogunbiyi; Ganiyu Adedayo Ajenikoko
    Power system insecurity often leads to frequent power system collapse. Experience has shown that power utility companies are generally poor in network argumentation and planning. For example, it is required that any new project must be simulated to ascertain its effects on networks before carrying out the construction. The simulation could be used to investigate the bus voltage profile, power flow, losses, overvoltage condition, etc. Consequently, this paper presents a Newton-Raphson algorithm for power flow solution and the application of the developed Q-basic computer software package to a large power system network. It involves the formulation of algorithms and development of flowcharts which were used to determine the steady-state operating conditions of buses, generation, branch power flows and circuit system losses of the case study network considered. The results obtained are presented and discussed. The fast convergence of the system at the fifth iteration confirmed the effectiveness of the software and the accuracy of the results. Having previously tested the software with a known solution network and work fine, suggest the results obtained are accurate and reliable. Transmission lines with high reactive power need the installation of equipment capable of reducing the reactive power. Buses with voltage values a little less than acceptable standard needs improvement.
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    Symmetrical Components of Transmission Line Parameters based on the Installed Tower Ground Resistivity
    (Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences, 2020-03-01) Lambe Mutalub Adesina; Ganiyu Adedayo Ajenikoko; Olalekan Ogunbiyi; Tosin Samuel Oluwafemi
    Transmission is a component of the electric power system alongside the generation and distribution systems. Effective and efficient planning is often required in system design and operation to ensure consistency and reliable supply of power to the Customers. Thus, transmission line parameters analysis needs to be carried out to ensure this proper planning. One of the crucial equipment used in transmission’s overhead lines is Tower supports which are of different configurations considering the Structural design, voltage ratings, and current transmission. Very often, towers are randomly installed to carry lines of the chosen voltage and current rating without considering the effects of earth resistivity on which the tower is installed. This paper presents the transmission line symmetrical component parameters evaluation of a chosen Transmission tower. An algorithm was developed, and a Python software program was used to implement this algorithm for the analysis. In achieving the target, the selected tower was imagined to have been erected on six different earth resistivity grounds which include, Sea water, swampy ground, pure slate, sandstone, and general average ground. Symmetrical component parameters evaluated include impedance, characteristics impedance, propagation constant, shunt admittance, and capacitive susceptance as they were found to be important in the effective monitoring of power transmission and distribution. The results of the analysis are presented and discussed. These results show that capacitive susceptance is independent on the tower's earth resistivity and varies for different tower structural configurations while other parameters vary with the earth resistivity value of the tower. Furthermore, regular line parameters monitoring is a measure that minimizes power transmission losses in networks.
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    Transformer Oil Regeneration as a Panacea for Electric Power Utility Company’s Equipment Optimization
    (Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences., 2019-07-01) Lambe Mutalub Adesina; Kamaldeen Saadu; Ganiyu Adedayo Ajenikoko
    Power transformers constitute the most costly equipment which often posed constraints to electric power utility companies’ management. These transformers develop faults often due to oil insulation problems resulting from poor level of insulation oil, lack of routine maintenance, contamination, age, carbonization arising from system tripping as well as degradation of paper insulation due to ageing. However, the most economical way of maintaining stability in power supply to customers is creating a routine program of transformer oil regeneration for power transformer in the network. This paper therefore presents the optimization process of transformer oil regeneration for electric power utility company equipment. In this study, combined techniques of hot oil circulation, oil purification and oil reclamation of transformer oil regeneration was used for analysis of two 15MVA, 33/11kV power transformer. The process is aimed at drying the solid insulation of the transformer through the circulation of hot oil. The results of the transformer oil test before and after carrying out oil regeneration processes for the two 15MVA transformers are obtained and presented. For each transformer, the results are in five categories of properties namely; Physical, Electrical, Chemical, Dissolved metals and Dissolved gas analysis properties. The results indicated that the viscosity of transformer 1 is better than that of transformer 2. In addition, the dielectric breakdown voltage of oil transformer 1 is of more quality than the oil in transformer 2. The results are in agreement with standard ASTMD, IEC and ISO because the transformer properties has individual standard with each having its own mark. The comparison shows that transformer oil regenerated was very close to reality because the oil in the two power transformers is close to 90 %.