대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2006년도 제37회 하계학술대회 논문집 A
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- Pages.5-7
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- 2006
고압계통 변류기 동작 특성 검토
A Study on Performance of Current Transformer in High Voltage System
- 최기열 (한국전력기술(주) 전기기술처) ;
- 이덕수 (한국전력기술(주) 전기기술처) ;
- 박문빈 (한국전력기술(주) 전기기술처) ;
- 김희택 (한국전력기술(주) 전기기술처) ;
- 장기풍 (한국전력기술(주) 전기기술처)
- Choi, Ki-Yeol (Korea Power Engineering Company, INC.(KOPEC)) ;
- Lee, Duck-Soo (Korea Power Engineering Company, INC.(KOPEC)) ;
- Park, Moon-Bin (Korea Power Engineering Company, INC.(KOPEC)) ;
- Kim, Hee-Taek (Korea Power Engineering Company, INC.(KOPEC)) ;
- Chang, Ki-Poong (Korea Power Engineering Company, INC.(KOPEC))
- 발행 : 2006.07.12
초록
Current transformers(CTs) whose rating is selected per a full load current of a feeder in high voltage system can be easily saturated due to high fault current that may be several hundred times of the full load current of the feeder. However, the protective relay shall operate properly at the fault without mis-operation under the CT saturation. So, in selecting the CT rating, it is necessary to consider the behaviour of CT and a performance of protection scheme in condition where CT can be saturated. In this paper, a performance of CT and a degree of saturation are studied and verified whether its ratings are proper for the operation of the protective relay.
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