전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제67권3호
  • /
  • Pages.352-357
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  • 2018
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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지중관로에서의 실제 허용전류 산출을 위한 도체온도 계산 알고리즘 개선에 관한 연구

Improvement of the Conductor Temperature Calculation Algorithm for Calculating the Allowable Current in the Underground Channel

  • Lee, Hyang-Beom (School of Electrical Engineering, Soongsil University) ;
  • Lee, Byung-Chul (School of Electrical Engineering, Soongsil University) ;
  • Kim, Jung-Hoon (School of Electrical Engineering, Hongik University) ;
  • Nam, Yong-Hyun (School of Electrical Engineering, Hongik University) ;
  • Kang, Ji-Won (Dept. of Power Transmission Laboratory, KEPRI)
  • 투고 : 2018.01.30
  • 심사 : 2018.02.08
  • 발행 : 2018.03.01
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초록

In this paper, the improvement of the conductor temperature calculation algorithm is studied. The allowable current of the underground transmission line is determined by the conductor temperature limit. Usually to calculate the allowable current limit, the conductor temperature is assumed in the most worst environment condition. It is possible to increase the transmission capacity if the actual burial environment is considered. Therefore, in this paper an algorithm is proposed to calculate the conductor temperature by distinguishing two area of a underground transmission line condition - the manhole where the temperature sensor can be installed and the underground transmission line in which the temperature sensor can not be installed easily. When calculating the conductor temperature by the underground line in the pipeline, the existing standard describes each environment as a single soil heat resistance and one ambient temperature. In order to compensate this situation, thermal resistance model that can take into consideration the ground surface temperature and under ground temperature is proposed. It is shown that the accuracy of the proposed model is increased compared with the existing standard calculation result.

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참고문헌

  1. J.B. Lee, and D.K. Kim, "Research Trend : Thermal Characteristics of Soil for Constructing the Underground Transmission System," World of Electricity, Vol. 37, No. 10, pp. 18-24, 1988, 10.
  2. S.H. Jeong, D.K. Kim, S.B. Choi, et al. , "Development of the Permissible Current-Carrying Capability Calculation Program for Transmission Power Cables in Ducts," KIEE Conference, pp. 340-342, 2001, 7.
  3. http://www.lscns.co.kr/
  4. J. H. Lee, C. M. Son, Y. J. Myung, and J. H. Kim, "Dynamic Rating System Development for Underground Transmission Cable Based on Scenario," KIEE Conference, pp. 441-442, 2017, 7.
  5. J. H. Kim, C. M. Son, J. H. Lee, W. K. Ham, J. H. Yeon, and Y. H. Nam, "Study on Developing a New Practical Dynamic Rating System Based on Permissible Current Formula of IEC 60287," KIEE Conference, pp. 227-228, 2017, 7.
  6. Korea Electric Power Corporation, "DS-6210", 2009
  7. J. C. Lee, K. H. Kim, and Y. C. Lee, "Study on the Applying to Soil Thermal Resistivity of Low-Voltage Underground Power Cables," Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 26, No. 5, pp. 65-70, 2012, 5. https://doi.org/10.5207/JIEIE.2012.26.5.065
  8. Y. W. Kang, M. J. Kim, T. I. Jang, J. W. Park, H. S. Park, and J. W. Kang, "A Review Method of Calculation Results on Cable Ampacity Using the Transformation to Electric Equivalent Circuit from Cable Thermal Circuit," The Transactions of The Korean Institute of Electrical Engineers, Vol. 65, No. 5, pp. 738-744, 2016, 5. https://doi.org/10.5370/KIEE.2016.65.5.738