Novel Islanding Detection Method using Frequency Drift for Grid-connected PV System

계통연계형 태양광발전 시스템의 주파수 변동에 의한 새로운 고립운전 검출기법

  • 은석준 (경북대학교 대학원 전기공학과) ;
  • 김흥근 (경북대학교 전자전기공학부) ;
  • 최종우 (경부대학교 전자전기공학부) ;
  • 이동춘 (영남대학교 전기공학과)
  • Published : 2005.06.01


PV system's islanding occurs when the uitilty grid is removed but local sources continue to operate and provide power to local loads. Islanding is one of the serious problems in an electric power system connected with dispersed power sources. Also, this can present safety hazards and the possibility of damage to other electric equipments. If the real and reactive power of RLC load and PV system are closely matched, islanding detection by passive methods becomes difficult. This paper shows the simulation and comparision for the previous active methods and novel islanding detection method using frequency drift is proposed for grid-connected PV system.



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