Consideration of Charging and Efficiently Using Surplus Photovoltaic power by Hydrogen Energy System

Photovoltaic power has increased and it is difficult to control photovoltaic power. The research focuses on a problem of the surplus photovoltaic power. Hydrogen energy system is a generator that is combined with photovoltaic power and fuel cells. During daytime, the system supplies consumers power that photovoltaic power generates. It is difficult for consumers to use all power by photovoltaic power because photovoltaic power is a lot. Hence, the surplus photovoltaic power occurs. The system stores the power into hydrogen tank as hydrogen energy. On the evening, when photovoltaic power does not generate power, the system supplies consumer power by fuel cells from hydrogen energy. Instead of the purchasing power, the system supplies power from the surplus photovoltaic power that usually is not used. Using the surplus power reduces the purchasing power. The research would reveal the effectiveness of the hydrogen energy system to reduce the purchasing power under conditions where in four seasons and three typical weather conditions. In addition, the period that the system supplies power could be revealed under cases where initially enough hydrogen energy is stored in the tank.