Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Islanding detection algorithm for a micro-grid based on the active and reactive power in the time domain

시간영역에서의 유효/무효전력을 이용한 마이크로그리드의 단독운전의 판단 알고리즘

  • Lee, Young-Gui (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Lee, Hye-Won (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Kim, Yeon-Hee (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Zheng, Tai-Ying (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center) ;
  • Kang, Yong-Cheol (Chonbuk National University, Dept. of Electrical Engineering, WeGAT research center, Smart grid research center)
  • 이영귀 (전북대학교 전기공학과, 풍력에너지전력망적응기술연구센터, 스마트그리드연구센터) ;
  • 이혜원 (전북대학교 전기공학과, 풍력에너지전력망적응기술연구센터, 스마트그리드연구센터) ;
  • 김연희 (전북대학교 전기공학과, 풍력에너지전력망적응기술연구센터, 스마트그리드연구센터) ;
  • 정태영 (전북대학교 전기공학과, 풍력에너지전력망적응기술연구센터, 스마트그리드연구센터) ;
  • 강용철 (전북대학교 전기공학과, 풍력에너지전력망적응기술연구센터, 스마트그리드연구센터)
  • Published : 2011.07.20
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Abstract

A micro-grid (MG) is usually interconnected to the main grid through the dedicated line. Immediately after the removal of the grid supply, the MG should be disconnected and remain disconnected until the main grid is re-energized. It should detect islanding condition as soon as it happens to adjust the setting of the protection relays in the MG. This paper proposes an islanding detection algorithm for the MG based on the active and reactive power delivered to the dedicated line in the time domain. The performance of the proposed algorithm is verified under islanding conditions and fault conditions using the PSCAD/EMTDC simulator. The results indicate that the proposed algorithm can discriminate the islanding conditions from the various fault conditions.

Keywords