Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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An Investigation on Correction of Overcurrent Protective Relaying Set Value for Bus Interconnected with Distributed Generations

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

  • 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)
  • 장성일 (강원대학교 전기전자정보통신공학부) ;
  • 김지원 (강원대학교 전기전자정보통신공학부) ;
  • 박인기 (강원대학교 전기전자정보통신공학부) ;
  • 권혁준 (강원대학교 전기전자정보통신공학부) ;
  • 김광호 (강원대학교 전기전자정보통신공학부)
  • Published : 2002.11.15
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Abstract

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.

Keywords