Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Control Method to Mitigate the Influence of Input Capacitor ni Photovoltaic Power Curtailment
Authors Hyoung-Kyu Yang ; Jung-Wook Park
DOI 10.6113/TKPE.2021.26.2.106
Page pp.106-111
ISSN 1229-2214
Keywords Grid-connected converter; Input capacitor; Photovoltaic system; Power curtailment
Abstract This study proposes a control method to mitigate the influence of input capacitors in photovoltaic power curtailment. The influence is analyzed by the power flow in the photovoltaic system. In conventional power curtailment, the power injected to the grid may be increased momentarily because the influence of the input capacitor on the power injected to the grid is not considered. The proposed method limits the change rate of photovoltaic array voltage to prevent a momentary increase in the power injected to the grid. The effectiveness of proposed method, which reduces power overshoot, is verified by experimental tests. The proposed method enables the power grid to operate stably in photovoltaic power curtailment.