Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Hybrid Anti-islanding Detection Scheme for Utility Interactive Inverter with Enhanced Harmonic Extraction Capability
Authors Sung-Wook Kang ; Kyeong-Hwa Kim
DOI 10.6113/TKPE/2014.19.4.312
Page pp.312-319
ISSN 1229-2214
Keywords band-pass filter; distributed generation; enhanced harmonic extraction; hybrid anti-islanding method; utility interactive inverter
Abstract When distributed generation such as a wind power system is connected to the grid, it should meet grid requirements like IEEE Std. 1547, which regulates the anti-islanding method. Since the islanding may cause damage on electrical equipments or safety hazards for utility line worker, a distributed generation should detect it as soon as possible. This paper proposes a hybrid anti-islanding method coupled with the active and passive detection methods. To enhance the harmonic extraction capability for an active harmonic injection method, cascaded second-order band-pass filter and signal processing scheme are employed. Simulation and experiments are carried out under the islanding test condition specified in IEEE Std. 1547. Passive over/under voltage and over/under frequency methods are combined with the active method to improve the detection speed under certain condition. The simulation and experimental results are presented to verify that the proposed hybrid anti-islanding method can effectively detect the islanding.