Research on MPPT control and implementation method for photovoltaic generation system and its simulation

Abstract

Photovoltaic generation system is made an overall and systematic introduction from several aspects. In this paper, the attention is devoted to research the maximum power point tracking (MPPT) based on analyze the output character of photovoltaic array, and mainly study the CVT method, increase conductance (IncCond) method, variable step MPPT method, and variable step IncCond method based improved starting characteristic which combine both the advantage of CVT and variable step IncCond method. More importantly, this paper make a detailed analysis about the implementation method of MPPT based two circuit topology, boost circuit and push-pull circuit, and resistance load and battery load of dc-dc circuit are considered particularly. Finally, contrast simulation results by PSIM software indicated that the variable step IncCond method improved starting characteristic method have both fine starting characteristic and tracking effect compare to above methods.