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All Journal Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Asean Journal of Science and Engineering (AJSE)
Ganiyu Adedayo Ajenikoko
Ladoke Akintola University of Technology
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology

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Optimal Power Flow with Reactive Power Compensation for Cost and Loss Minimization On Nigerian Power Grid System Ganiyu Adedayo Ajenikoko; Olakunle Olakunle; Elijah Olabode
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 5, No 3: September 2017
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v5i3.284

Abstract

One of the concerns of power system planners is the problem of optimum cost of generation as well as loss minimization on the grid system. This issue can be addressed in a number of ways; one of such ways is the use of reactive power support (shunt capacitor compensation). This paper used the method of shunt capacitor placement for cost and transmission loss minimization on Nigerian power grid system which is a 24-bus, 330kV network interconnecting four thermal generating stations (Sapele, Delta, Afam and Egbin) and three hydro stations to various load points. Simulation in MATLAB was performed on the Nigerian 330kV transmission grid system. The technique employed was based on the optimal power flow formulations using Newton-Raphson iterative method for the load flow analysis of the grid system. The results show that when shunt capacitor was employed as the inequality constraints on the power system, there is a reduction in the total cost of generation accompanied with reduction in the total system losses with a significant improvement in the system voltage profile
A Mathematical Model for Estimating the End-of-Life of Power Transformers: From Literature Review to Development Analysis Ganiyu Adedayo Ajenikoko; Ogunmakinde Jimoh Ogunwuyi
ASEAN Journal of Science and Engineering Vol 2, No 3 (2022): AJSE: December 2022
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v2i3.50338

Abstract

A power transformer used to transfer electrical energy in any part of the electrical or electronic circuit between the generator and distribution primary circuits. The aims of this study was to developed a mathematical model for determining the End-of-life of power transformers. The paper employed the use of 2-Furaldehyde (2FAL) content values of 0.5 ppm to 10ppm and Arrhenius Parameters in determining the Degree of Polymerization (DP) of the transformer using Jacobi and Gauss-Seidel numerical analysis iterative techniques. The techniques were implemented in a MATLAB environment. The End-of-life of the transformer was determined by adding the service age at any point in time to the remaining lifetime at that point. The developed mathematical model yielded a DP range of 247 ≤ DP ≤ 1184 with a lifespan of 273678 hours for a virgin transformer, based on a constant hotspot temperature of 1100C. The developed model gave a better approach to determining the end-of-life of power transformers based on the parameters of insulation level and the temperature of the system. Therefore, by effective control of the condition of operation, it would be possible to estimate the useful lifetime of a power transformer at any time.
Co-Authors Elijah Olabode Ogunmakinde Jimoh Ogunwuyi Olakunle Olakunle