To realize the maximum power output of a grid-connected inverter, the MPPT (maximum power point tracking) control method\nis needed.The perturbation and observation (P&O) method can cause the inverter operating point to oscillate near the maximum\npower. In this paper, the fuzzy control P&O method is proposed, and the fuzzy control algorithm is applied to the disturbance\nobservation method. The simulation results of the P&O method with fuzzy control and the traditional P&O method prove that not\nonly can the newmethod reduce the power loss caused by inverter oscillation during maximum power point tracking, but also it has\nthe advantage of speed. Inductive loads in the post-grid-connected stage cause grid-connected current distortion. A fuzzy control\nalgorithm is added to the traditional deadbeat grid-connected control method to improve the quality of the system�s grid-connected\noperation.The fuzzy deadbeat control method is verified by experiments, and the harmonic current of the grid-connected current\nis less than 3%.
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