Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Novel Voltage Control MPPT Algorithm using Variable Step Size based on P&O Method
Authors Jichan Kim ; Hanju Cha
DOI 10.6113/TKPE.2020.25.1.29
Page pp.29-36
ISSN 1229-2214
Keywords MPPT(Maximum Power Point Tracking); P&O(Perturb and Observe); PV system; Voltage control
Abstract In this study, a variable step algorithm is proposed on the basis of the perturb and observe method. The proposed algorithm can follow the maximum power point (MPP) quickly when solar irradiance changes rapidly. The proposed technique uses the voltage change characteristic at the MPP when the environment changes because of insolation or temperature. The MPP is tracked through the voltage control using a variable step method. This method determines the sudden change of solar irradiance by setting the threshold value and operates in fast tracking mode to track the MPP rapidly. When the operation point reaches the MPP, the mode switches to the variable step mode to minimize the steady state error. In addition, the output disturbance is decreased through the optimization of the control method design. The performance of the proposed MPPT algorithm is verified through simulation and experiment.