Analysis of Anti-Islanding Schemes using Frequency Drift in Distributed Generation System

분산전원 시스템의 주파수 변동을 통한 단독운전 방지기법 분석

  • Received : 2015.01.30
  • Accepted : 2015.04.16
  • Published : 2015.06.20


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.


Supported by : 중소기업청


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