Active Frequency Drift Positive Feedback Method for Anti-islanding using Digital Phase-Locked-Loop

디지털 위상검출기법을 적용한 능동적 주파수 변화 정궤환기법

  • Lee, Ki-Ok (Dept. of Electrical Eng., Kwangwoon University) ;
  • Young, Young-Seok (Korea Institute of Energy Research) ;
  • Choi, Ju-Yeop (Dept. of Electrical Eng., Kwangwoon University) ;
  • Choy, Ick (Dept. of Information and Control Eng., Kwangwoon University) ;
  • Song, Seung-Ho (Dept. of Electrical Eng., Kwangwoon University) ;
  • Ko, Moon-Ju (Dept. of Information and Control Eng., Kwangwoon University)
  • 이기옥 (광운대학교 전기공학과) ;
  • 정영석 (한국에너지기술연구원) ;
  • 최주엽 (광운대학교 전기공학과) ;
  • 최익 (광운대학교 정보제어공학과) ;
  • 송승호 (광운대학교 전기공학과) ;
  • 고문주 (광운대학교 정보제어공학과)
  • Published : 2007.06.30


As photovoltaic(PV) power generation system becomes more common, it will be necessary to investigate islanding detection method for PV systems. Islanding of PV systems can cause a variety of problems and must be prevented. However, if the real and reactive power of the load and PV system are closely matched, islanding detection by Passive methods becomes difficult. Also, most active methods lose effectiveness when there are several PV systems feeding the same island. The active frequency drift positive feedback method(AFDPF) enables islanding detection by forcing the frequency of the voltage in the island to drift up or down. In this paper the research for the minimum value of chopping fraction gain applied digital phase-locked-loop (DPLL) to AFDPF considering output power quality and islanding prevention performance are performed by simulation and experiment according to IEEE Std 929-2000 islanding test.



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