한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제32권4호
  • /
  • Pages.307-312
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  • 2019
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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TEV 검출에 의한 가스 절연 개폐기의 절연 진단

Insulation Diagnosis of Gas-Insulated Switchgears by TEV Detection

  • 공정배 (한국해양대학교 전기전자공학과) ;
  • 길경석 (한국해양대학교 전기전자공학과) ;
  • 김성욱 ((주)효성 Power Asset Management팀)
  • Kong, Jeong-Bae (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University) ;
  • Kil, Gyung-Suk (Department of Electrical and Electronics Engineering, Korea Maritime and Ocean University) ;
  • Kim, Sung-Wook (Power Asset Management Team, Hyosung Corporation)
  • 투고 : 2019.03.04
  • 심사 : 2019.04.01
  • 발행 : 2019.07.01
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초록

Transient earth voltage (TEV) signals propagate on metal surfaces when partial discharge (PD) occurs due to the deterioration of insulation performance in the operation of gas-insulated switchgears (GIS). A TEV sensor has advantages of high sensitivity and convenient installation for detecting PD defects. However, the TEV sensor depends on imports in domestic and detailed studies have not been conducted. In this study, a sensor was designed and fabricated by the TEV principle and its response characteristics were evaluated for detecting PD defects, which were simulated as protrusion on conductor (POC), protrusion on enclosure (POE), and free moving particle (FMP) defects. Finally, the PD-induced TEV signals were measured and phase-resolved partial discharge (PRPD) patterns were analyzed to identify the type of defect.

키워드

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Fig. 1. TEV sensor.

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Fig. 2. Configuration of experimental setup for verifying the response characteristics.

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Fig. 3. Frequency spectrum of TEV sensor.

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Fig. 4. Result of response characteristics.

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Fig. 5. Configuration of experimental setup.

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Fig. 6. Electrode systems.

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Fig. 7. PD voltage pulse.

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Fig. 8. PD-induced TEV signal.

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Fig. 9. PRPD patterns.

참고문헌

  1. IEC Publication 60270, High-Voltage Test Techniques: Partial Discharge Measurements, 2010.
  2. CIGRE JWG 33/23/12, Insulation Co-Ordination of GIS: Return of Experience, on Site Tests and Diagnostic Techniques, Electra No. 176, 1998.
  3. S. M. Markalous, S. Tenbohlen, and K. Feser, IEEE Trans. Dielectr. Electr. Insul., 15, 1576 (2008). [DOI: https://doi.org/10.1109/TDEI.2008.4712660]
  4. G. Wang, H. E. Jo, S. J. Kim, S. W. Kim, and G. S. Kil, Measurement, 91, 351 (2016). [DOI: https://doi.org/10.1016/j.measurement.2016.05.033]
  5. B. H. Lee, S. H. Lee, and G. S. Kil, Proc. Conference of The Korean Institute of Electrical Engineers (KIEE, Seoul, Korea, 1994) p. 287.
  6. N. Davies, J.C.Y. Tang, and P. Shiel, Proc. 19th International Conference on Electricity Distribution (Elec. Dist., Vienna, Austria, 2007) p. 1.
  7. G. Wang, W. H. Kim, J. B. Kong, G. S. Kil, and H. K. Ji, Trans. Electr. Electron. Mater., 19, 195 (2018). [DOI:https://doi.org/10.1007/s42341-018-0037-5]