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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Hardness Profiles of Porcelain Insulators by Climate Changes

기후 변화에 따른 자기 애자의 시멘트 경도 변화

  • Lee, Joohyun (Multidisciplinary Core Institute for Future Energies, Incheon National University) ;
  • Kim, Hong-Sik (Multidisciplinary Core Institute for Future Energies, Incheon National University) ;
  • Kim, Joondong (Multidisciplinary Core Institute for Future Energies, Incheon National University) ;
  • Choi, In-Hyuk (KEPCO Research Institute, Korea Electric Power Corporation)
  • 이주현 (인천대학교 차세대융합에너지중점연구소) ;
  • 김홍식 (인천대학교 차세대융합에너지중점연구소) ;
  • 김준동 (인천대학교 차세대융합에너지중점연구소) ;
  • 최인혁 (한국전력공사 전력연구원)
  • Received : 2017.10.21
  • Accepted : 2017.11.17
  • Published : 2018.01.01
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Abstract

Insulators used in overhead transmission lines are continuously exposed to a number of mechanical and electrical stresses owing to external environmental factors, resulting in corrosion, reduction in durability, and deterioration. Widely used porcelain insulators are fabricated with cement and porcelain and are especially common in Korea. Changes in the hardness and chemical reactivity of the cement increase the leakage and fault currents and increase the possibility of flashover due to insulation breakdown. Therefore, it is important to evaluate the durability and defects of porcelain insulators. Studies on the reliability of various evaluation methods are needed to prevent accidents by accurately determining the replacement timing and potential defects in porcelain insulators. In this study, the hardness of the cement part of the porcelain insulator was measured using the Vickers hardness test and its composition was analyzed by energy dispersive spectroscopy and X-ray diffraction analysis. The performance of the insulators was compared in two different regions with varying climatic conditions. This study presents an evaluation method of the defects in porcelain insulators by measuring humidity, which can also be used to assess the reliability of the insulators.

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References

  1. J. H. Pi and Y. G. Choi, Ceramist, 19, 15 (2016).
  2. I. H. Choi, J. H. Choi, Y. H. Jung, D. I. Lee, G. J. Jung, T. W. Shin, and H. K. Bang, Proc. KIEE Annual Conference, A (KIEE, Busan, 2004) p. 527.
  3. S. J. Chung, S. J. Lee, B. S. Sim, S. H. Heo, H. D. Kim, C. H. Kim, I. Y. Seo, and G. H. Lee, Proc. KIIEE Annual Conference (KIIEE, Hoengseong, 2016) p. 74.
  4. C. S. Oh, Y. J. Lee, C. H. Ryu, B. W. Lee, G. B. Choi, and J. Y. Koo, Proc. KIEE Annual Conference (KIEE, Muju, 2009) p. 1461.
  5. I. K. Song and C. Y. Kim, The Transactions of The Korean Institute of Electrical Engineers, 49C, 406 (2000).
  6. J. Wang and W.C.K. Wong, J. Mater. Process. Technol., 95, 164 (1999). [DOI: https://doi.org/10.1016/S0924-0136(99)00276-9]
  7. J. Gong, J. Wu, and Z. Guan, J. Eur. Ceram. Soc., 19, 2625 (1999). [DOI: https://doi.org/10.1016/S0955-2219(99)00043-6]
  8. J. J. Chen, L. Sorelli, M. Vandamme, F. J. Ulm, and G. Chanvillard, J. Am. Ceram. Soc., 93, 1484 (2010). [DOI: https://doi.org/10.1111/j.1551-2916.2009.03599.x]
  9. K. Okada and N. Otsuka, J. Am. Ceram. Soc., 69, 652 (1986). [DOI: https://doi.org/10.1111/j.1151-2916.1986.tb07466.x]