The study of tracking maximum power point based on DSP in solar arrays

Abstract：The output of photovoltaic (PV) array is affected by the environmental factors such as irradiation and temperature.In order to track the maximum power point, match the array and the load, an effective search algorithm is needed.Maximum power point tracking (MPPT) is one of the important loops in photovoltaic grid-connected system.There are many methods of tracking maximum power point before, such as, constant voltage tracking, climbing method and incremental conductance algorithm.In this paper, another MPPT method is presented, which the perturb and observe with exhaustive can track the MPP fast.Through analyzing the V-A character of the solar cells and power-voltage curve, and combing the hardware circuit controlled by TMS320LF2407 and the MPPT method, the system can meet the need of maximum power tracking.The experiment result shows that the algorithm can fast and exactly track the maximum power point.

Keyword：photovoltaic;MPPT;V-A character;TMS320LF2407;