대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2007년도 제38회 하계학술대회
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- Pages.44-45
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- 2007
히스테리시스 특성을 고려한 측정용 변류기 보상 알고리즘
Compensating algorithm for a measurement type CT considering hysteresis characteristic of the core
-
강용철
(전북대학교) ;
- 정태영 (전북대학교) ;
-
이병은
(전북대학교) ;
- 소순홍 (전북대학교) ;
- 이현웅 (전북대학교) ;
- 이미선 (전북대학교) ;
- 박정호 (전북대학교) ;
- 최현태 (전북대학교) ;
- 장성일 (전북대학교) ;
- 김용균 (주)한국 IED Eng. Inc.)
-
Kang, Yong-Cheol
(Chonbuk National University) ;
- Zheng, Taiying (Chonbuk National University) ;
-
Lee, Byung-Eun
(Chonbuk National University) ;
- So, Soon-Hong (Chonbuk National University) ;
- Lee, Hyun-Woong (Chonbuk National University) ;
- Lee, Mi-Sun (Chonbuk National University) ;
- Park, Jung-Ho (Chonbuk National University) ;
- Choi, Hyun-Tae (Chonbuk National University) ;
- Jang, Sung-Il (Chonbuk National University) ;
- Kim, Yong-Gyun (Hankook IED Eng. Inc.)
- 발행 : 2007.07.18
초록
This paper deals with error compensation in current transformers. Since the exciting current can be considered as the main error source, its evaluation can allow the compensation of its detrimental effects to be obtained. The exciting current required by the transformer in every king of steady state operation can be determined by simply acquiring the secondary current, provided that the examined CT has been preliminarily identified. This paper also proposed a new approach to the model of the exciting branch. The exciting branch can be divided into a non-linear core loss resistor, and a non-linear magnetizing inductor whose flux and current characteristic is not the same as the characteristic shown by the joined tips of the first quadrant of a family of hysteresis loops. The performance of the proposed algorithm was validated under various conditions using EMTP generated data. Test result show, in all cases an improvement in primary current reproduction accuracy, compared with that achieved using CT's ratio.
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