Simulation Analyis of Maximum Power Control of Photo Voltaic Power System

As primary energy source such as coal and oil has been dried up and has bad influence on environment, human urgently need renewable energy which is friendly to environment. So in the future, solar energy will be very important energy source. It is noticeable that the output characteristics of a PV array are influenced by the environment factors, and the conversion efficiency of PV arrays is very low. Photovoltaic array simulations can be used to find better methods to implement maximum power point tracking (MPPT) control for efficient solar power systems. Photovoltaic cells model of photovoltaic power generation system and basic control algorithm is discussed in this paper. MPPT control based on perturbation & observation (P&O) method and incremental conductance (IncCond) method is respectively simulated in Matlab/Simulink. The simulation analysis shows that P&O method is simple, but has considerable power loss. IncCond method has more precise control and faster response, but has correspondingly higher hardware requirement. In practice, in order to achieve maximum efficiency of photovoltaic power generation, a reasonable and economical control method should be chosen.