Fuzzy Control of Solar Tracker for Photovoltaic Panels
Abstract
In this paper modeling and control of a solar tracker to receive maximum available output power of a PV panel is studied. This system (tracker and fuzzy controllers) first finds set point (direction of solar beam radiation), then controller moves the panel toward this point. Two controllers are applied to control θ and φ (coordination of normal vector of panel) which are degrees of freedom of system. Inputs of these controllers are error and derivative of error of θ and φ. Outputs of these controllers are electrical signals fθ and fφ that act on two stepper motors. These motors rotate the panel. Comparing result of simulation of normal vector of panel with direction of solar beam radiation indicates good performance of the system. Furthermore this system is independent of model of panel and geographical location.