Fuzzy-immune MPPT control of PV generation system under partial shade condition

PV generation system is partially shaded at times in actual operation,which makes the PV output characteristics more complicated.Aiming at its nonlinearity,uncertainty and multi-peak,fuzzy logic is applied to track the actual maximum power point of system.The conventional fuzzy logic controller is further improved to realize the fuzzy perturbative tracking under partial shade condition and the artificial immunity theory is used to enhance the response speed and robustness.The simulative results show that,the proposed method has a better dynamic performance than that of the traditional PO method.