Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Novel Islanding Detection Scheme without Non Detection Zone
Authors Yeong-Min Jo ; Dong-Gyun Kim ; Sang-Yoon Cho ; Seung-Ho Song ; Ick Choy ; Young-Kwoun Lee ; Ju-Yeop Choi
DOI 10.6113/TKPE/2015.20.6.540
Page pp.540-549
ISSN 1229-2214
Keywords Grid-connected photovoltaic inverter; Anti-islanding; NDZ(Non Detection Zone); Power quality; THD(Total Harmonic Distortion)
Abstract Unintentional islanding results in safety hazards, reliability, and many other issues. Therefore, the islanding detection of a power conditioning system of a distributed generation, such as a grid-connected photovoltaic inverter, is a key function for standard compliance. Currently, many anti-islanding schemes have been examined, but existing anti-islanding schemes have poor power quality and non-detection zone issues. Therefore, this study analyzes the non-detection zone in a more deliberate manner than the existing analysis of the non-detection zone and proposes a new anti-islanding scheme, which has negligible power quality degradation and no non-detection zone. Simulation and experimental results validate that the proposed scheme shows much better performance than other existing schemes.