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The cryogenic system of the 10.5 kV/1.5 kA high Tc superconducting fault current limiter.

Author(s) : GONG L. H., FANG Z. C., XU X. D., et al.

Type of article: Article

Summary

High-voltage insulation and filling periodically with cryogen are key problems for the cryogenic system of the high Tc superconducting fault current limiters (HTC-SFCLs). The nitrogen thermosiphon cooling system has been proposed, designed and tested for the 10.5 kV/1.5 kA HTC-SFCL cooled by liquid nitrogen. The problem of the high-voltage insulation gets to be solved by this cryogenic system, and also the period of the filling with liquid nitrogen can be obviously prolonged due to the closed self-circulation, even without further extra filling. In this paper, this unique cryogenic cooling system for the 10.5 kV/1.5 kA HTC-SFCLs has been described. The saturated nitrogen steam through the high-vacuum-jacked line from the HTC-SFCLs is cooled into the liquid nitrogen which returns again to the HTC-SFCLs. Two G-M refrigerators provide the cooling capacity for the condensation in the condenser. Test results have indicated that the 5-6 L/h of the saturated nitrogen vapour condensation can meet the cooling requirement of the 10.5 kV/1.5 kA HTC-SFCLs on each phase. [Reprinted with permission from Elsevier. Copyright, 2007].

Details

  • Original title: The cryogenic system of the 10.5 kV/1.5 kA high Tc superconducting fault current limiter.
  • Record ID : 2008-0491
  • Languages: English
  • Source: Cryogenics - vol. 47 - n. 7-8
  • Publication date: 2007/07

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