Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Performance Improvement of an Anti-Islanding Algorithm using the Variation of Reactive Power with an Improved DFT Method
Authors Duk-Hong Kang ; Dae-Keun Choi ; 李Kyo-Beum Lee
DOI 10.6113/TKPE/2010.15.3.179
Page pp.179-187
ISSN 1229-2214
Keywords Anti-islanding; Photovoltaic system; Reactive power; Improved DFT method; F+requency detection
Abstract This paper proposes a new anti-islanding method for single-phase grid-connected photovoltaic (PV) systems using Goertzel algorithm. The proposed scheme is based on inducing increases or decreases of frequencies of load voltage and current that is in the form of existences or periodical variations of the reactive power components. The frequency detection is needed to apply this power variation method to the grid-connected power converter. The proposed method is able to get a fast detection for anti-islanding without the effect of harmonics and noises. The simulation and experiment results validate the effectiveness of the proposed method.