The irrigation system fed from biaxial PV panels

In this study, an irrigation system which has an adaptive control system fed from the photovoltaic panels was designed and developed. The control system was designed as an electromechanical system which photovoltaic panel follows the sun on two axes, including both azimuth angle and zenith angle. In the executed system, the tracking of the sun was performed in both axes using dsPIC. Moreover, the control circuit with dsPIC processes the data obtained from the calculations of current-voltage and liquid levels. Differently from other studies in the literature, in this study, the source which feeds the irrigation system was determined according to the power obtained from the panel and PV panel was moved in two axes. The power generated by the panel is fed from battery if the power is below the determined power value and the panel is used if the power is above it. Through this developed algorithm, it was aimed to keep the tank full when the water is needed and prevent unnecessary discharge of the battery and lengthen its economic life depending on the quantity of charging-discharging of it. As a result of this study, the system was optimal activated without the requirement of any other energy except PV panel.