Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Islanding Detection for Grid-connected PV Inverter under Parallel Operation
Authors Yeong-Min Jo ; Dong-Gyun Kim ; Seung-Ho Song ; Ick Choy ; Young-Kwoun Lee ; Sang-Yoon Cho ; Ju-Yeop Choi
DOI 10.6113/TKPE/2016.21.4.283
Page pp.283-289
ISSN 1229-2214
Keywords Grid-connected photovoltaic inverter; Anti-islanding; Parallel operation; NDZ(Non Detection Zone); THD(Total Harmonic Distortion)
Abstract Islanding protection of a grid-connected photovoltaic (PV) inverter is a key function for standards compliance. Unintentional islanding results in safety hazards, reliability, and many other issues. Therefore, many anti-islanding schemes have been examined. However, existing anti-islanding schemes have poor power quality and non-detection zone issues. Moreover, most schemes have problems that deteriorate the performance of islanding detection under parallel operation. Therefore, this paper proposes a novel anti-islanding scheme that has negligible power quality degradation and has no non-detection zone and islanding detection under a parallel operation. Both simulation and experimental results validate the proposed scheme.