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Superconductive cable and superconductive cable line

A technology of superconducting cables and superconducting wires, which is applied to cable accessories of low-temperature cables, superconducting devices, superconducting/high-conducting conductors, etc. Problems such as increased cross-sectional area and increased cable cost

Inactive Publication Date: 2004-04-14
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the technology of shunting the short-circuit current by using the winding mode leads to the increase of the cross-sectional area of ​​the winding mode; and the characteristic of the small area unique to the high temperature superconducting current is weakened
[0006] The technology of making the overcapacity of the high-temperature superconducting cable core much larger than the capacity during normal operation leads to an increase in the cost of the cable

Method used

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  • Superconductive cable and superconductive cable line
  • Superconductive cable and superconductive cable line
  • Superconductive cable and superconductive cable line

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0026] see below figure 1 The structure of the superconducting cable of the present invention will be described.

[0027] (the whole frame)

[0028] The superconducting cable 1 of the present invention is constructed such that the cable core wire 2 is housed in a heat insulating tube 8 . Each cable core 2 includes a former 3 , a first conductor layer 4 and an insulating layer 5 from inside to outside. It is also possible to sequentially arrange the second conductor layer 6 and the protective layer 7 on the periphery of the insulating layer 5 . Although a three-core high-temperature superconducting cable is used in this embodiment, a single-core cable may also be used.

[0029] (winding mode)

[0030] Aluminum, copper or stainless steel tubes are used as the winding die 3, which is the innermost part of the cable core wire 2. Alternatively, a strand of metal wire, such as thin copper wire, may be used, taking into account the mechanical properties of the cable. If tubes a...

no. 2 example

[0040] Ten pieces of YBa with a width of 5mm and a thickness of about 0.1mm are spirally wound around a stainless steel pipe with an inner diameter of 20mmφ, an outer diameter of 24mmφ, and a length of 2m at a pitch of 300mm. 2 Cu 3 o x (YBCO) superconducting stripline, thereby forming a single-layer Y-based superconducting cable conductor. The superconducting strip line is constructed so that a 2 μm-YBCO superconducting layer is formed on a stainless steel substrate with a width of 5 mm and a thickness of 0.1 mm through a 1 μm-YSZ intermediate layer, and the surface is covered with 5 μm of silver, and in liquid nitrogen The critical current is about 40A. The layers within a range of 30 cm from each end of the superconducting cable were integrated by welding with copper-lead alloy wires connected thereto for conducting current.

[0041] A DC current carrying test was performed by immersing the conductor in liquid nitrogen. The critical current determined by the development...

no. 3 example

[0046] Twenty pieces of HoBa with a width of 5mm and a thickness of about 0.1mm are spirally wound around a copper tube with an inner diameter of 26mmφ, an outer diameter of 30mmφ, and a length of 1m at a pitch of 400mm. 2 Cu 3 o x (HoBCO) superconducting stripline, thereby forming two layers of HoBCO superconducting cable conductors. The HoBCO superconducting stripline is constructed to form a 3 μm-HoBCO superconducting layer through a 1 μm-YSZ intermediate layer on a stainless steel substrate with a width of 5 mm and a thickness of 0.1 mm, and the surface of the layer is covered with 5 μm of silver, liquid nitrogen Their critical current is about 50A. An insulating layer with a thickness of 5 mm is formed by half-covering 10 layers of kraft paper with a thickness of 0.2 mm between the first and second layers. The first and second layers are wound in opposite directions. The layers within 30cm from each end of the conductor of the superconducting cable are integrated by w...

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Abstract

A superconducting cable includes a first conductor layer formed of superconducting wires, and an insulating layer formed at the outer periphery of the first conductor layer. The first conductor layer is an assembly of a plurality of superconducting wires obtained by forming an RE based superconductor layer on a metal substrate. The current is limited by an electrical resistance generated when the current of the first conductor layer exceeds the critical current, thereby preventing the superconducting cable from being damaged. A superconducting cable line is formed of a base and a current limiter, which is formed by using the above-described superconducting cable. Accordingly, when a current exceeding the rated current of the base flows, it can be damped.

Description

technical field [0001] The present invention relates to a superconducting cable and a superconducting cable line using the same. More specifically, the present invention relates to a high-temperature superconducting cable capable of preventing damage even by the occurrence of abnormal current such as a short-circuit current, and to a superconducting cable line using the cable. Background technique [0002] It has long been hoped that high-temperature superconducting cables can be used to deliver large amounts of electricity. Especially in urban areas where there is a confined space, it is very difficult to ensure the routing of new cables (called "cable ducts"). Even if it were actually possible, the construction would require enormous infrastructure costs, which would make such cabling impractical. [0003] In order to solve this problem, a high temperature superconducting cable is now being developed, which has a smaller size and is almost the same size as the known cros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H01B12/00H01B12/02H10N60/00
CPCH02G15/34Y02E40/64Y02E40/648H01B12/02H01B12/00Y02E40/641Y02E40/60
Inventor 大松一也
Owner SUMITOMO ELECTRIC IND LTD
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