Design and analysis of a DC stand-alone photovoltaic-battery system for a rural house in Libya

Dabas, Youssef H Mussa (2021) Design and analysis of a DC stand-alone photovoltaic-battery system for a rural house in Libya. Masters thesis, Memorial University of Newfoundland.

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Abstract

This thesis presents a comprehensive study about the design, optimization, and analysis of an isolated Photovoltaic (PV)-battery system for fulfilling the load of a rural house in Libya. A bus voltage of 48 V DC is considered. The annual demand of the house was estimated by completed thermal modeling of the loads in the BEopt program. The assumed design was sized and analyzed using HOMER Pro software and consisted of 12 PV panels, 325 watts each, and 12 lead-acid batteries of 12 V, 219 Ah. The dynamic model of the system is implemented in MATLAB/Simulink software. The results show that the proposed approach can provide a stable 48 V DC for the intended load. It can also be used to meet the electricity needs of houses with low loads or in rural communities with basic electricity needs. A detailed economic analysis was carried out by comparing the proposed PV system with a hybrid PV-DGN-BTT system, an independent Diesel generator. The performed financial analysis reveals that the proposed system is a feasible solution - with a net present cost of $15,070 - that can generate electricity at the cost of $0.333/kWh, indicating that such a system will make economic sense in remote off-grid areas.

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