Research on MPPT with Improved Perturb-observe Method

Since the output of photovoltaic cell changes with the light intensity and temperature of the environment, and the properties has a typical characteristic of nonlinearity, the maximum power point of the photovoltaic module must be tracked to improve the efficiency of photovoltaic power generation. The output characteristic of photovoltaic cell was analyzed at first in the paper, then the perturb-observe method was improved by introducing the fuzzy control, and impedance matching optimization is realized by the PI closed-loop control Boost circuit. Finally, simulation models of the relevant control algorithm were built in Matlab, and the result showed that the ameliorated control algorithm possesses higher speed and accuracy in MPPT by simulation analysis and contrast, so it improved the photovoltaic efficiency of electricity generation.