Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Analysis of Anti-Islanding Schemes using Frequency Drift in Distributed Generation System
Authors Yeong-Min Jo ; Sang-Yoon Cho ; Seung-Ho Song ; Ick Choy ; Ju-Yeop Choi ; Young-Kwoun Lee
DOI 10.6113/TKPE/2015.20.3.247
Page pp.247-254
ISSN 1229-2214
Keywords Grid connected; Distributed generation; PCS; Active anti-islanding; Frequency drift; Power quality; THD
Abstract Unintentional islanding results in safety hazards, power quality degradation, and many other issues. Thus, islanding detection of grid-connected distributed generation system is a key function for standards compliance. Many anti-islanding schemes are currently being studied; however, existing anti-islanding schemes used in inverters have power quality degradation and non-detection zone issues. Therefore, this paper analyzes existing anti-islanding schemes by using frequency drift in accordance with both islanding detection performance and power quality. This paper also proposes a new anti-islanding scheme by using frequency drift. Both simulation and experimental results show that the proposed scheme has negligible power quality degradation and no non-detection zones compared with other existing schemes.