Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1988.11a
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- Pages.252-257
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- 1988
Improved Ultrasonic Method for Locating Partial Discharges in Transformers
개선된 초음파방법에 의한 변압기내 부분방전 위치 검출
- Kwak, Hee-Ro (Soong Sil UNIV.) ;
- Kim, Jae-Chul (Soong Sil UNIV.) ;
- Cho, Kook-Hee (Soong Sil UNIV.) ;
- Han, Min-Koo (Seoul Nat. UNIV.) ;
- Lim, Ju-Il (Research Center KEPCO) ;
- Kwan, Tae-Won (Research Center KEPCO) ;
- Yoon, Young-Beum (Research Center KEPCO)
- 곽희로 (숭실대) ;
- 김재철 (숭실대) ;
- 조국희 (숭실대) ;
- 한민구 (서울대) ;
- 임주일 (한국전력 기술연구원) ;
- 권태원 (한국전력 기술연구원) ;
- 윤용범 (한국전력 기술연구원)
- Published : 1988.11.25
Abstract
This paper discribes an improved technique for locating partial discharge sites within operating transformers by ultrasonic method which utilizes the different travel times of the electrical and ultrasonic signals produced by partial discharges to determine the location of the sources. The technique was to develope the measurement system based on the enhancement of the acoustic emission signals using signal square, circuit to improve the detectable sensitivity and reliability. Also an ultrasonic pulse generator was designed and made to transmit periodically pulses equivalent to pratial discharges and to check the good performance of the system, echo effects and self-diagnosis. Through the laboratory work, it was confirmed that the system and the generator can be used satisfactorily for diagnosing power transformers and for studying echo effects and self-diagnosis of the system.
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