Modeling And Simulation of a Reliable Hybrid (Pv/Diesel) Power System with Energy Storage in Batteries for University Library, Bayero University, Kano State, Nigeria

Abstract

Due to unreliability of power supply from national grid, high cost of diesel and maintenance of generators being an alternate for national grid, there is  need to adopt a renewable energy source for efficient and reliable power supply. Savings associated with conversion of a stand-alone diesel generator  powered system to a reliable PV/Diesel hybrid power system with energy storage in batteries for Bayero University Kano Library using HOMER software  was presented in this study. The economic parameter of merit used in selecting an optimum energy system from set of configurations was total Net  Present Cost (NPC) in billions of naira. Generator + PV + Battery system has a total NPC of (₦ 1.17B) and saves (₦ 0.9B), Generator + PV system has a total  NPC of (₦ 1.68B) and saves (₦0.4B), Generator + Battery system has a total NPC of (₦ 2.05B) and saves (₦ 0.03B), PV + Battery system has a total NPC of (₦  2.28B) and saves (₦ - 0.2B) when all compared with Generator-only system (₦ 2.08B). It can be seen that the best case is the PV + Gen + Battery system.  Even though it has the highest capital cost, but it resulted to the least net present cost (NPC); as such, PV + Gen + Battery system is the optimized model  to fulfill the load demands. Therefore, this research work shows that the integration of PV with battery storage into the existing diesel stand-alone system  in the University library is more reliable at the lowest lifecycle cost.