Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Optimum Control Period and Perturbation Voltage for PV-MPPT Controller Considering Real Wether Condition
Authors Danbi Ryu ; Yong-Jung Kim ; Hyosung Kim
DOI 10.6113/TKPE.2020.25.1.1
Page pp.1-5
ISSN 1229-2214
Keywords Solar power generation; Perturb and observe algorithm; MPPT efficiency; MPPT control period; Perturbation voltage
Abstract Solar power generation systems require maximum power point tracking (MPPT) control to operate PV panels at their maximum power point (MPP). Most conventional MPPT algorithms are based on the slope-tracking concept. A typical slope-tracking method is the perturb and observe (P&O) algorithm. The P&O algorithm measures the current and voltage of a PV panel to find the operating point of the voltage at which the calculated power is maximized. However, the measurement error of the sensor causes irregularity in the calculation of the generated power and voltage control. This irregularity leads to the problem of not finding the correct MPP operating point. In this work, the power output of a PV panel based on the P&O algorithm is simulated by considering the insolation profiles from typical clear and cloudy weather conditions and the errors of current and voltage sensors. Simulation analysis suggests the optimal control period and perturbation voltage of MPPT to maximize its target efficiency under real weather conditions with sensor tolerance.