전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제57권1호
  • /
  • Pages.65-72
  • /
  • 2008
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

계통연계 분산전원의 새로운 단독운전 판별기법

Novel Islanding Detection Method for Distributed Generation Interconnected with Utility Grid

  • 배병열 (명지대 공대 전기공학과) ;
  • 이두영 (명지대 공대 전기공학과) ;
  • 고종선 (단국대 공대 전기공학과) ;
  • 최남섭 (전남대 공대 전기전자통신컴퓨터공학부) ;
  • 한병문 (명지대 공대 전기공학과)
  • 발행 : 2008.01.01
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초록

This paper describes the development of a novel islanding detection method, which uses the signal cross-corelation scheme between the injected reactive current and the power frequency deviation. The existing method, which injects the reactive current of 2.5-5% to the rated current and detects the frequency deviation directly, brings about lowing the power quality due to the harmonic pollution. The proposed method eliminates the weak point of the existing method, because it injects the reactive current less than 1% to the rated current. The operational feasibility was verified through computer simulations with PSCAD/EMTDC software, and experimental works with a 10kVA hardware prototype. The proposed method can detect the islanding status effectively without lowing the power quality of interconnected distributed generation system.

키워드

참고문헌

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