대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

분산전원의 계통 연계에 따른 모선 보호용 과전류 계전기 설정치 정정에 대한 고찰

An Investigation on Correction of Overcurrent Protective Relaying Set Value for Bus Interconnected with Distributed Generations

  • 장성일 (강원대학교 전기전자정보통신공학부) ;
  • 김지원 (강원대학교 전기전자정보통신공학부) ;
  • 박인기 (강원대학교 전기전자정보통신공학부) ;
  • 권혁준 (강원대학교 전기전자정보통신공학부) ;
  • 김광호 (강원대학교 전기전자정보통신공학부)
  • Jang, Sung-Il (Department of Electrical and Computer Engineering, Kangwon National University) ;
  • Kim, Ji-Won (Department of Electrical and Computer Engineering, Kangwon National University) ;
  • Park, In-Ki (Department of Electrical and Computer Engineering, Kangwon National University) ;
  • Kwon, Hyouk-Jun (Department of Electrical and Computer Engineering, Kangwon National University) ;
  • Kim, Kwang-Ho (Department of Electrical and Computer Engineering, Kangwon National University)
  • 발행 : 2002.11.15
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초록

This paper describes the effect of distributed generations (DG) on the bus protection scheme. When the generating capacity of DG is larger than 3 MVA totally, DG are generally connected to the 22.9 kV bus directly with the dedicated line. Due to the fault current contribution of DG, the overcurrent protective relay that have conventional set value cannot detect the fault occurred in distribution power network with DG. Therefore. the impacts from interconnection of DG on the overcurrent protective relay for bus protection should be accurately assessed and mitigated. Simulation results show that it would be necessary to modify the overcurrent protective relay set value for protecting the bus according to the generating capacity of DG.

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