Energy efficiency of photovoltaic power plants in stand-alone power supply systems

This paper proposes the guidelines for selection of a rational scheme for construction of the hybrid PV-diesel power systems, depending on the location latitude on the example of Russia. The research methodology is based on the energy balance analysis of the autonomous power supply systems with photovoltaic-diesel generation. As a result of the mutual review of the graphs of energy generation and power consumption in the stand-alone power system, a real time interaction algorithm of photovoltaic cells and energy storage was obtained. It was shown that achievement of a sustainable energy balance in the photo-diesel system is possible by using the hybrid inverter, which will provide a complete substitution of diesel generation during high insolation periods; and at lower temperatures, it will complement diesel generation in the power inverter mode without any artificial restrictions on generation power of photovoltaic power plant relative to the total current power of autonomous power supply system.