The study of the algorithm of maximum power point track in PV system

The output of photovoltaic(PV) array is influenced by the environmental factors such as irradiation and temperature.Maximum power point tracker(MPPT) is usually used in PV systems to track the maximum power point and match the array and the load. Exactly tracking the maximum power point depends on effective search algorithm.This paper analyzes the advantages and disadvantages of traditional perturb and observe(PO) and incremental conductance(IncCond) algorithm,then proposed a novel varied step optimization algorithm which has been testified by MATLAB.Simulation results show this algorithm can fast and exactly track the maximum power point.