Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2008.07a
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- Pages.136-137
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- 2008
Development of the iron-cored electronic current transformer
철심 코어형 전자식 변류기 개발
- Kang, Yong-Cheol (Chonbuk National University) ;
- Kim, Yeon-Hee (Chonbuk National University) ;
- Jang, Sung-Il (Chonbuk National University) ;
- Park, Jong-Min (Chonbuk National University) ;
- Choi, Jung-Hwan (Hankook IED ENG. Inc.) ;
- Kim, Yong-Kyun (Hankook IED ENG. Inc.) ;
- Lee, Byung-Sung (KEPRI) ;
- Song, Il-Keun (KEPRI)
- 강용철 (전북대학교) ;
- 김연희 (전북대학교) ;
- 장성일 (전북대학교) ;
- 박종민 (전북대학교) ;
- 최정환 (한국 IED) ;
- 김용균 (한국 IED) ;
- 이병성 (한국 전력 연구원) ;
- 송일근 (한국 전력 연구원)
- Published : 2008.07.16
Abstract
A current transformer(CT) should provide the faithful reproduction of the primary current to the measurement or the protection equipments. The exciting current resulting from the hysteresis characteristics of the core causes an error between the primary current and the secondary current of the CT. A compensating algorithm for the secondary current of the current transformer that removes the effects of the hysteresis characteristics of the iron-core has proposed. The core flux linkage is calculated by integrating the measured secondary current, and then inserted into the flux-magnetizing current curve to obtain the magnetizing current. The exciting current at every sampling interval is obtained by summing the core-loss and magnetizing currents and added to the measured current to obtain the correct current. This paper describes the innovative new product of the iron-cored electronic current transformer. This product composes an iron-cored CT and an intelligent electronic device(IED) ported the compensating algorithm. The test results of the iron-cored electronic current transformers in Korea Electro-technology Research Institute(KERI) are presented.
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