Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2007.11b
- /
- Pages.18-20
- /
- 2007
Compensation of the secondary voltage of a three winding coupling capacitor voltage transformer
3권선 CCVT의 2차 전압 보상 방법
-
Kang, Yong-Cheol
(Chonbuk National University)
;
- Kim, Yeon-Hee (Chonbuk National University) ;
- Zheng, Tai-Ying (Chonbuk National University) ;
- Jang, Sung-Il (Hankook IED ENG. Inc.) ;
- Kim, Yong-Gyun (Hankook IED ENG. Inc.)
-
강용철
(전북대학교 전자정보 공학부)
;
- 김연희 (전북대학교 전자정보 공학부) ;
- 정태영 (전북대학교 전자정보 공학부) ;
- 장성일 (한국 아이이디 이엔지) ;
- 김용균 (한국 아이이디 이엔지)
- Published : 2007.11.02
Abstract
A coupling capacitor voltage transformer (CCVT) is used in an extra high voltage power system to obtain the standard low voltage signal for protection and measurement. To suppress the effects of ferro-resonance more effectively, a three winding CCVT is used. This paper proposes an algorithm for compensating the secondary voltage of the three winding CCVT. With the secondary voltage of the three winding CCVT, the secondary and tertiary currents are obtained; the primary winding current is obtained by considering non-linear characteristics of the core; the voltage across the capacitor and the inductor are calculated and then added to the measured voltage to compensate the secondary voltage. Test results indicate that the algorithm can reduce the errors of the three winding CCVT significantly.
Keywords