몰드변압기에서 용량성 프로브에 의한 부분방전 검출 기술 = Detection Technique of Partial Discharge by a Capacitive Probe in Cast-resin Transformers

다국어 초록 (Multilingual Abstract)

This paper dealt with a partial discharge (PD) detection method for insulation diagnosis in cast-resin transformers. To detect PD pulse, a planar-capacitive probe was designed and fabricated. The probe has no insulation problem and can be installed on cast-resin transformers even in operation since it does not connect with high voltage conductor. The PD measurement system consists of the capacitive probe, a coupling network of 100 [kHz] low-cutoff frequency, and an amplifier with a gain of 40 [dB] and a frequency bandwidth of 500 [Hz]~45 [MHz]. A plane-needle and a plane-plane electrode system were fabricated to simulate insulation defects in a cast-resin transformer. Sensitivity of the PD measurement system, which is evaluated by a standard calibrator was 0.35 [mV/pC] for positive and 0.45 [mV/pC] for negative, respectively. The PD detection by the capacitive probe was less sensitive than that by a coupling capacitor according to IEC 60270, but we could analyze the magnitude and the phase distribution of PD pulse.

참고문헌 (Reference)

1 P. Agoris, ISH 7-, 2007

2 J. Meppelink, ISH 71-, 1987

3 V. Fister, ISH 61-, 1983

4 Wang Caixiong, CMD 2010

5 G. J. Pukel, CMD 2006

6 J. P. van Bolhuis, ISEI 22-, 2002

7 T. Leibfried, ISEI 34-, 1996

8 G. C. Stone, 7 : 9-, 1991

9 윤진열, "전력용변압기에서 UHF 부분방전 신호의 전파 특성" 한국전기전자재료학회 23 (23): 798-803, 2010

10 길경석, "유중 부분방전의 음향검출에 관한 연구" 한국전기전자재료학회 23 (23): 53-60, 2010

11 박찬용, "몰드변압기의 부분방전 검출기술에 관한 연구" 한국전기전자재료학회 22 (22): 786-791, 2009

12 M. D. Judd, "Sensors and Signal Interpretation" 21 : 2005

13 F. H. Kreuger, "Partial Discharge Detection in High Voltage Equipment" Butterworth 129-, 1989

14 "IEC International Standard 60270, High-voltage test techniques-Partial discharge measurements"

15 Mazen Abdel-Salam, "High-Voltage Engineering Theory and Practice 2nd ed" Marcel Dekker, Inc 235-, 2000

16 M. S. Naidu, "High voltage engineering 4th ed" McGraw-Hill 364-, 2009

17 J. D. Kraus, "Electromagnetics" McGraw-Hill 392-, 1988

18 S. Tenbohlen, "CIGRE Session 2000" CIGRE 12-, 2000

19 T. Aschwanden, "CIGRE Session 1998" CIGRE 127-, 1998