지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.9 No.1
- 발행연도
- 2014.1
- 수록면
- 280 - 285 (6page)
이용수
초록· 키워드
오류제보하기
In order to evaluate the insulation deterioration in the stator windings of five gas turbine generators(137 MVA, 13.8 kV) which has been operated for more than 13 years, diagnostic test and AC dielectric breakdown test were performed at phases A, B and C. These tests included measurements of AC current, dissipation factor, partial discharge (PD) magnitude and capacitance. ΔI and Δtanδ in all three phases (A, B and C) of No. 1 generator stator windings showed that they were in good condition but PD magnitude indicated marginally serviceable and bad level to the insulation condition. Overall analysis of the results suggested that the generator stator windings were indicated serious insulation deterioration and patterns of the PD in all three phases were analyzed to be internal, slot and spark discharges. After the diagnostic test, an AC overvoltage test was performed by gradually increasing the voltage applied to the generator stator windings until electrical insulation failure occurred, in order to determine the breakdown voltage. The breakdown voltage at phases A, B and C of No. 1 generator stator windings failed at 28.0 kV, 17.9 kV, and 21.3 kV, respectively. The breakdown voltage was lower than that expected for good-quality windings (28.6 kV) in a 13.8kV class generator. In the AC dielectric breakdown and diagnostic tests, there was a strong correlation between the breakdown voltage and the voltage at which charging current increases abruptly (Pi₁, Pi₂).
목차
Abstract
1. Introduction
2. Experimental Procedure
3. Test results and Discussion
4. Conclusion
References
참고문헌 (12)
참고문헌 신청
1. [학술지(정기간행물)] - 김희동 / 2002 / 발전기 고정자 권선의 절연열화 메카니즘 분석 / 전기전자재료학회논문지 15 (2) : 119 ~ 126
2. [학술지(정기간행물)] - 김희동 / 2004 / 운전중인 대형 터빈발전기에서 절연상태 평가 / 전기학회논문지 C권 53 (6(C)) : 324 ~ 329
3. [학술지(정기간행물)] - 김희동 / 2011 / Analysis of Insulation Quality in Large Generator Stator Windings / Journal of Electrical Engineering & Technology 6 (3) : 384 ~ 390
4. [보고서] - Y. Ikeda / 1988 / A Method for Diagnosing the Insulation Deterioration in Mica-Resin Insulated Stator Windings of Generator
5. [학술지(정기간행물)] - B. K. Gupta / 1992 / Assessment of Insulation Condition in Rotating Machine Stators / IEEE Trans. on Energy Conversion 7 (3) : 500 ~ 508
2. [학술지(정기간행물)] - 김희동 / 2004 / 운전중인 대형 터빈발전기에서 절연상태 평가 / 전기학회논문지 C권 53 (6(C)) : 324 ~ 329
3. [학술지(정기간행물)] - 김희동 / 2011 / Analysis of Insulation Quality in Large Generator Stator Windings / Journal of Electrical Engineering & Technology 6 (3) : 384 ~ 390
4. [보고서] - Y. Ikeda / 1988 / A Method for Diagnosing the Insulation Deterioration in Mica-Resin Insulated Stator Windings of Generator
5. [학술지(정기간행물)] - B. K. Gupta / 1992 / Assessment of Insulation Condition in Rotating Machine Stators / IEEE Trans. on Energy Conversion 7 (3) : 500 ~ 508
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UCI(KEPA) : I410-ECN-0101-2015-500-001072540