Abstract
This paper presents the simulation and hardware implementation of a hill-climbing (HC) modified fuzzy-logic (FL) maximum power point tracking (MPPT) control scheme used in photovoltaic (PV) power systems with the direct control method. The conventional HC method is used to improve the FL search method and eliminate their drawbacks. The main difference of the proposed method to the existing MPPT control method includes that it offers fast and accurate tracking to the maximum power point under uniform radiation or partial shading conditions as compared to the conventional FL method, and it eliminates the proportional-integral control loop. Contributions are made in several aspects such as converter design, simulation, controller programming, and experimental setup. Simulation and experimentation results are provided to demonstrate the validity of the proposed hill-climbing modified fuzzy-logic controller.
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