Maximum power point tracking algorithm for photovoltaic generation based on voltage compensation

In order to improve the maximum power point tracking efficiency of photovoltaic generation system at sudden changes of weather conditions, an improved MPPT algorithm is proposed, which is developed from the main idea of perturb and observe (P&O) method and constant voltage method. When the temperature or irradiance changes, the proposed algorithm sets the operating point close to the new maximum power point by voltage compensation, then using the P&O method to make the system reach the new maximum power point. Meanwhile, a case study of photovoltaic (PV) system is established in the Matlab/Simulink, to show its better performance on stability and dynamic behavior, by comparing this algorithm with traditional P&O method.