Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents

Jiahui Zhu, Huifeng Li, Ming Qiu, Zhenming Li, Wei Liu, Xiaokang Lai, Jin Fang, Weijia Yuan

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the power grid, a cold dielectric high temperature superconducting (CD HTS) cable usually subjects to the impact of fault currents in the transmission system. During the fault, a large amount of Joule heat is generated, causing the temperature of HTS cable rise and leading a transformation of HTS elements therein from a superconducting state to a normal state which would deteriorate the current carrying capacity of HTS cables. This paper proposes a new method for calculating transient currents and temperature distributions in CD HTS cables by coupling an equivalent circuit mathematical model with a thermal conduction model of HTS cables considering the impact of fault currents. The proposed method is applied to an 110 kV/ 3 kA CD HTS cable consisted of YBCO coated conductor with a fault current of 25 kA rms lasting 3 s. The obtained current and temperature distributions in the HTS cable show that there is a serious current diversion effect in the CD HTS cable and the currents of the superconducting layers decrease along with the rise of the temperature in the HTS cable which has different rate of change after reaching 92 K. Therefore the copper former becomes the main path for the fault current and withstands about 96% of the fault current. This analytical method provides the theoretical basis for the protection strategy of superconducting cables which is significant for the stable operation of HTS cables.

Original languageEnglish
Pages (from-to)3176-3181
Number of pages6
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Volume35
Issue number12
DOIs
Publication statusPublished - 20 Jun 2015

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Superconducting cables
Electric fault currents
Numerical analysis
Cables
Thermodynamic properties
Temperature
Temperature distribution
Coupled circuits
Equivalent circuits
Mathematical models
Copper

Keywords

  • cold dielectric high temperature superconducting (CD HTS) cable
  • current distribution
  • fault current
  • magneto-thermal coupling calculation
  • temperature distribution
  • YBCO

Cite this

Zhu, J., Li, H., Qiu, M., Li, Z., Liu, W., Lai, X., ... Yuan, W. (2015). Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents. Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, 35(12), 3176-3181. https://doi.org/10.13334/j.0258-8013.pcsee.2015.12.031
Zhu, Jiahui ; Li, Huifeng ; Qiu, Ming ; Li, Zhenming ; Liu, Wei ; Lai, Xiaokang ; Fang, Jin ; Yuan, Weijia. / Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents. In: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering. 2015 ; Vol. 35, No. 12. pp. 3176-3181.
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abstract = "In the power grid, a cold dielectric high temperature superconducting (CD HTS) cable usually subjects to the impact of fault currents in the transmission system. During the fault, a large amount of Joule heat is generated, causing the temperature of HTS cable rise and leading a transformation of HTS elements therein from a superconducting state to a normal state which would deteriorate the current carrying capacity of HTS cables. This paper proposes a new method for calculating transient currents and temperature distributions in CD HTS cables by coupling an equivalent circuit mathematical model with a thermal conduction model of HTS cables considering the impact of fault currents. The proposed method is applied to an 110 kV/ 3 kA CD HTS cable consisted of YBCO coated conductor with a fault current of 25 kA rms lasting 3 s. The obtained current and temperature distributions in the HTS cable show that there is a serious current diversion effect in the CD HTS cable and the currents of the superconducting layers decrease along with the rise of the temperature in the HTS cable which has different rate of change after reaching 92 K. Therefore the copper former becomes the main path for the fault current and withstands about 96{\%} of the fault current. This analytical method provides the theoretical basis for the protection strategy of superconducting cables which is significant for the stable operation of HTS cables.",
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Zhu, J, Li, H, Qiu, M, Li, Z, Liu, W, Lai, X, Fang, J & Yuan, W 2015, 'Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents', Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, vol. 35, no. 12, pp. 3176-3181. https://doi.org/10.13334/j.0258-8013.pcsee.2015.12.031

Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents. / Zhu, Jiahui; Li, Huifeng; Qiu, Ming; Li, Zhenming; Liu, Wei; Lai, Xiaokang; Fang, Jin; Yuan, Weijia.

In: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, Vol. 35, No. 12, 20.06.2015, p. 3176-3181.

Research output: Contribution to journalArticle

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T1 - Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents

AU - Zhu, Jiahui

AU - Li, Huifeng

AU - Qiu, Ming

AU - Li, Zhenming

AU - Liu, Wei

AU - Lai, Xiaokang

AU - Fang, Jin

AU - Yuan, Weijia

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AB - In the power grid, a cold dielectric high temperature superconducting (CD HTS) cable usually subjects to the impact of fault currents in the transmission system. During the fault, a large amount of Joule heat is generated, causing the temperature of HTS cable rise and leading a transformation of HTS elements therein from a superconducting state to a normal state which would deteriorate the current carrying capacity of HTS cables. This paper proposes a new method for calculating transient currents and temperature distributions in CD HTS cables by coupling an equivalent circuit mathematical model with a thermal conduction model of HTS cables considering the impact of fault currents. The proposed method is applied to an 110 kV/ 3 kA CD HTS cable consisted of YBCO coated conductor with a fault current of 25 kA rms lasting 3 s. The obtained current and temperature distributions in the HTS cable show that there is a serious current diversion effect in the CD HTS cable and the currents of the superconducting layers decrease along with the rise of the temperature in the HTS cable which has different rate of change after reaching 92 K. Therefore the copper former becomes the main path for the fault current and withstands about 96% of the fault current. This analytical method provides the theoretical basis for the protection strategy of superconducting cables which is significant for the stable operation of HTS cables.

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DO - 10.13334/j.0258-8013.pcsee.2015.12.031

M3 - Article

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Zhu J, Li H, Qiu M, Li Z, Liu W, Lai X et al. Numerical analysis on coupled magneto-thermal properties of high temperature superconducting cables subjected to fault currents. Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering. 2015 Jun 20;35(12):3176-3181. https://doi.org/10.13334/j.0258-8013.pcsee.2015.12.031