Browsing by Author "SAMSON Joseph Bukola"

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    Development of a microcontroller-based integration of renewable energy sources for implementation of a hybrid power supply system.
    (Department of Electronic and Electrical Enigneering, Faculty of Technology, Obafemi Awolowo University., 2023) SAMSON Joseph Bukola
    This study determined the appropriate size for each of the renewable energy sources (RES) to be integrated, developed a microcontroller-based system capable of coordinating and monitoring the energy output power flow of the sources, and simulated and evaluated the performances of the system. This was done with a view to providing a sustainable solution for electrification of areas not connected to main power grid. The wind speed, solar radiation and load demand data of the study site were obtained from Obafemi Awolowo University, Ile-Ife and then averaged into 1-hour intervals for different geographical seasons. The sequential quadratic programming (SQP) approach was used in the study to determine appropriate and economically viable sizes for the integrated energy systems. The SQP approach was used in the study to find optimal and cost-effective sizes for integrated energy systems that meet the specified requirements. Suitable mathematical models, and size optimization were obtained for the system’s components. Using MATLAB (version 2021a), a microcontroller algorithm for optimal power flow in a hybrid renewable energy source (HRES) was both developed and simulated. For the HRES cost analysis, the overall installation cost and cost per kW of each component were estimated, and three different optimal configurations for the site location were compared for techno-economic analysis. The results show that an off-grid energy system based on RES, with biogas backup, is feasible in the examined location. According to the simulation results, renewable energy (RE) contributes 51.4 % of total load demand in December during the academic period of the weekdays and 96.4 % of total load demand over the weekends of the same period in June. The energy contribution from RES from storage facilities ranged between 20.1 % and 44.0 % of total load demand. Among the three different configurations viz wind/PV/pumped-hydro/battery/biogas, PV/wind/battery, and wind/pumped- hydro/biogas, as examined in this work, wind/PV/pumped-hydro/battery/biogas is discovered to be the most cost-effective configuration with Net Present Cost and Levelised Cost of Energy of $3,085,675 and 0.027 $/kW respectively. The optimal and most cost-effective solution proposed configurations consist of 500 kW of PV system, 400 kW wind turbine. In conclusion, the study showed that implementing an off-grid HRES with sufficient storage, utilizing the pumped-hydro storage system, can provide a sustainable solution for electrification of once not connected to the grid.