Faculty of Engineering

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Browsing Faculty of Engineering by Author "Adenle, Johnson Gbadebo"

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    Data-Driven Condition Assessment and Remaining Life Prediction of Low-Voltage Distribution Transformers Using Insulation Resistance Measurements: A Case Study of Ajayi Crowther University Distribution Network
    (IRE JOURNALS, 2026-06-01) Adenle, Johnson Gbadebo; Opakunle James Akinpelu; Obanisola Oluwole Olawale
    This paper presents a comprehensive insulation resistance (IR) assessment of low voltage distribution transformers at Ajayi Crowther University (ACU), Oyo, Nigeria. The study evaluates the safety, reliability, and operational efficiency of four distribution transformers (three 500 kVA units and one 750 kVA unit) through systematic IR testing using a Megger MIT1025 insulation tester. Testing was conducted in three configurations: Line-to-Earth (L-E), Neutral-to-Earth (N-E), and Line- to-Neutral (L-N), with results corrected to a standard temperature of 20°C and benchmarked against IEEE standards. Statistical analysis revealed an overall mean corrected IR of 137.5 MΩ with a standard deviation of 21.46 MΩ. Three transformers (T1, T3, and T4) demonstrated healthy insulation with corrected IR values ranging from 100 to 160 MΩ. However, transformer T2 exhibited localized insulation degradation, failing the L-N test with a corrected IR of 90 MΩ, below the IEEE minimum threshold of 100 MΩ. The findings indicate that while the university's electrical distribution system is largely in satisfactory condition, immediate corrective maintenance is required for T2.
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    Development of Smart Energy Management Socket Using Real-Time Metering and Demand Response Control
    (IRE JOURNALS, 2026-06-06) Adenle, Johnson Gbadebo
    The need for energy conservation, management, control, and overload protection for optimal energy deployment and consumption in domestic, commercial, and industrial applications has necessitated the design of an energy supply system that can be controlled and monitored in real time from any location worldwide. The proposed system leverages an ESP32 Wi-Fi-enabled micro-controller integrated with the PZEM-004T sensor module to measure current, voltage, energy, power, frequency, and power factor. Each outlet is switched via a 2N2222A bipolar junction transistor driving individual relay channels that control AC supply to the connected loads. Parameters are monitored, controlled, and driven online through a Firebase Real-time Database web interface. Functional testing showed an average voltage measurement error of 0.14% over a 227 V-230 V range, an average current error of 1.18%, and a power measurement error of 2.11%. These negligible deviations confirm the accuracy, reliability, and suitability of the system for smart-home and industrial energy management applications.
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    FEASIBILTY STUDIES OF A PROPOSED HYBRID POWER GENERATION SYSTEM FOR A COMPUTER CENTER IN A REMOTE STATION
    (International Journal of Technical Research and Applications, 2016-08-01) Omogoye, Okeolu Samuel; Ogundare, Ayoade Benson; Oyetola, Jamiu Babatunde; Keshinro, Kolawole Kazeem; Adenle, Johnson Gbadebo
    This paper presents the feasibility study of a proposed Photovoltaic/Diesel power generation hybrid system for a remote computer centre in Nigeria. This design comprises the correct determination of station electrical daily load consumption and station solar radiation data. These data are used to determine the hybrid components sizes and its configuration via the use of HOMER software for design and simulation. The simulation results were used to carry out the optimization of this system based on twenty five years life expectances. Analyzing the hybrid power generation system (HPGS) helps in determining the cost effect, the level of emission and optimizes the size of the system. This analysis shows that the HPGS has lower cost, emit less harmful gaseous substances and give reasonable system sizes leading to reduction of energy wastage as compared to conventional stand alone Diesel generator. However, the final design perfectly meets the station energy requirement. Hence, (HPGS) is a recommended solution for this application.
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    SIMULATION AND ANALYSIS OF FAULTS IN DISTRIBUTION NETWORK SYSTEM IN OGBOMOSO UNDERTAKING WITH DISTRIBUTION RELIABILITY INDICES
    (International Journal of Current Research and Applied Studies, (IJCRAS), 2022-08-01) Adenle, Johnson Gbadebo; Koledowo, Saliu Oyewale; Abubakar, Bawa
    Distribution network accounts for more than 90% of power service disruptions. This study present fault occurring on power distribution network using Ogbomoso Business hub as a case study consisting of four feeders namely: Takie, Oke-Ado, Owode and Gambari feeders. Simulation and Modeling were carried out using MATLAB/Simulink software package. Faults data are obtained for selected feeders using fault log book from the station under study. Analysis of fault is accomplished using MATLAB Software and associated with statistics measures (Distributed reliability indices). Reliability indices is therefore computed for each of the four feeders. The result shows that the Average Service Availability Index for Takie, Oke-Ado, Owode and Gambari feeders are 99.884%, 99.843%, 99.888% and 99.950% respectively
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    Techno-Economic Design and Simulation of a Hybrid Renewable Energy Micro-grid for Reliable Campus Electrification in Sub-Saharan Africa: A Case Study of Ajayi Crowther University, Nigeria
    (IJCER Journal, 2026-06-05) Adenle, Johnson Gbadebo; Opakunle James Akinpelu
    This paper presents the design, simulation, and performance evaluation of a grid-connected hybrid renewable energy microgrid system for Ajayi Crowther University in Oyo, Nigeria. The system integrates wind turbines, solar photovoltaic panels, battery energy storage, and grid connection to address persistent challenges of unreliable national grid supply, high diesel generator costs, and environmental pollution. Using MATLAB/Simulink, HOMER Pro, and PSCAD simulation platforms, a comprehensive techno-economic analysis was conducted based on one year of meteorological data (April 2024 - April 2025) and detailed load profiling of the Engineering Faculty and Diocese of Lagos West (DLW) Female Hostel. The optimised system comprises 300 kW wind capacity (three 100 kW turbines), 250 kW solar PV, 600 kWh battery storage, and 700 kW inverter capacity. Simulation results demonstrate that the hybrid system achieves a 74.3% renewable energy fraction, generating 817,820 kWh annually from renewable sources while reducing grid dependency to 25.7%. The system delivers annual CO emission reductions of 436.7 tonnes and demonstrates economic viability with a levelised cost of energy of $0.198/kWh and a payback period of 12.3 years. This study contributes to the growing body of knowledge on hybrid microgrid applications in Sub-Saharan African university campuses and provides a replicable framework for similar institutional electrification projects in developing regions

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