Maximum Power Point Tracking Method Using Perturb and Observe Algorithm for Small Scale DC Voltage Converter

摘要

The photovoltaic technology has been focused as one of the alternative renewable energy resources, the difficulty occurs from the amount of power generated from the panel varies with the solar irradiation reflected. In order to enhance the efficiency and increase the commercial, mainly the DC-DC buck converter circuit including with the Perturb and Observed maximum power point tracking were implemented for controlling the operation to let the system operated at maximum power. The converter's switching was improved by implemented gate-driver circuit implemented using the Opto-coupler. For the solution, the maximum power point tracking was performed using PIC18F46K20 controller detected the voltage and current using the sensors built from voltage divider and instrumental amplifier circuits. Results show the algorithm could be able to keep the voltage to be constant at the target of 10 V with the average accuracy of 94.96% in for tracking the maximum power according to the demand load voltage.