Load profile impact on a stand-alone photovoltaic system

An adequate Stand-Alone Photovoltaic system (SAPV) optimization methodology consists in taking into account different aspects. A compromise solution must be made between energy supply quality and the selected optimization criteria. This paper proposes a methodology to study the load profile impact on SAPV system reliability and storage component. The main objective is to introduce some changes on the load profile shape such as load shifting and amplitude modulation. The system operation was simulated for two days with different load profiles to raise consumers demand impact on battery bank State Of Charge (SOC), load satisfaction and the excess energy. The term used to evaluate system reliability is Loss of Power Supply Probability (LPSP), which is related to load satisfaction. Simulation results showed the efficiency of introducing some changes on the load profile. It enabled an optimal exploitation of the produced PV energy and insured a better supply to the load with minimum energy loss.