Variable Step Size Perturb and Observe MPPT for PV Solar Applications
Abstract: In order to deliver
maximum output of photovoltaic (PV) cells, the usage of maximum power point tracking
(MPPT) is essential. The speed and stability of the tracking technique are
highly desired. Perturband Observe (P&O) is one of the most common tracking
techniques, but it suffers from the slow tracking speed at small duty cycle
step and fluctuates when subjected with large duty step, which results in
higher losses under dynamic weather to which the photovoltaic (PV) cells
exposed. In this paper, variable stepsize Perturb and Observe is introduced
throughout Matlab/Simulink simulation to overcome this problem to achieve
higher efficiency, reliable tracking accuracy and higher speed under fast
changing weather. Incomparison with other variable P&O techniques, the
proposed method features a dynamic step size for more tracking efficiency and
accuracy. Double diode modelling is used in this technique for better photovoltaic
(PV) cell’s characteristic prediction. In this study, the adapted technique had
been tested to wide range of sun irradiance and operation temperatures.
Author: Awang Bin Jusoh
Journal Code: jptkomputergg150049
