High-temperature superconducting cable current lead structure and design method thereof

Abstract

According to the high-temperature superconducting cable current lead structure and the design method thereof, a plurality of metal bars are arranged in parallel along a lead axis, preset intervals are kept between the metal bars, and each metal bar comprises a first lead section, a second lead section and a third lead section; the bottom end of the first lead section is in contact with the liquid level of liquid nitrogen; the top end of the first lead section is connected with the bottom end of the second lead section; the top end of the second lead section is connected with the bottom end of the third lead section; the top end of the third lead section is connected with the room temperature wiring terminal; the first lead section and the third lead section are solid metal bars, the second lead section is a hollow metal bar, and the top end of the second lead section does not exceed the position of the epoxy plate. By adopting a mode of forming the hollow groove inside, the structure is simple, the thermal field distribution is obviously optimized, the heat leakage of the current lead is reduced, and reliable support is provided for the subsequent design of the current lead; the current lead with the structure is easy to process and manufacture, convenient to install and maintain and beneficial to engineering popularization and application.

Description

technical field [0001] The invention relates to the technical field of high-temperature superconducting cable current leads, and more particularly, to the structure and design method of the high-temperature superconducting cable current leads. Background technique [0002] High-temperature superconducting cables have the advantages of high transmission power, high current density, low loss and environmental friendliness. The high-temperature superconducting current lead is a composite current lead. It uses high-temperature superconducting materials in the low-temperature section, and uses conductive materials such as copper or copper alloys between room temperature and high-temperature superconducting materials. It is used as a high-temperature oxide superconducting material for ceramic materials. The thermal conductivity is very low, and no heat is generated during normal operation, so the heat injected into the liquid nitrogen container is very small. In the conventional c...

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Problems solved by technology

Increasing the cross-sectional area of ​​the current lead can reduce Joule heat, but it will increase the heat leakage caused by conduction heat; while reducing the cross-sectional area of ​​the current lead, the situation is just the opposite

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