Abstract :
Fixed step perturbation and observation(P&O) method is easy to implement, simple algorithm, and widely used, but it cannot simultaneously obtain high tracking accuracy and speed, cannot overcome the problem of false positives of P&O method. PV MPPT was selected as the research object, based on the various existing engineering applications control algorithm analysis, according to the PV output characteristics, the advantages of an integrated variable step P&O and forecasting power P&O method, we propose prediction based on the power of variable step P&O method. We build a photovoltaic simulation model and the proposed method of simulation experiments in the Matlab/Simulink environment. The new algorithms and the traditional P&O method have conducted an experimental comparison. The experimental results show that the method is effective.
