High-temperature superconducting three-phase alternating-current cable with compact structure

Abstract

The invention discloses a compact-structure high-temperature superconducting three-phase alternating-current cable, which comprises a metal framework, a three-phase superconducting sub-cable, a metal filler and a metal sleeve, and is characterized in that the superconducting sub-cable comprises a liquid nitrogen channel, a unit superconducting cable and an insulating sheath; the unit superconducting cable comprises a superconducting strip group, a metal filler and a metal sheath, and the superconducting strip group is formed by tightly stacking second-generation high-temperature superconducting REBCO strips. Three-phase superconducting sub-cables are arranged close to a metal framework, the metal framework is arranged on the innermost layer of the three-phase alternating-current cable, a metal sleeve is arranged on the outermost layer of the three-phase alternating-current cable, and gaps between the three-phase superconducting sub-cables and the metal sleeve are filled with metal aluminum. A cooling medium is introduced into a liquid nitrogen channel in the ABC three-phase superconducting sub-cable to provide a low-temperature environment required by superconducting, and the three-phase alternating current cable realizes insulation among ABC three-phase alternating current through the superconducting sub-cable outer layer rubber sheath. The three-phase alternating-current cable is compact in structure, and has larger current-carrying capacity compared with an existing high-temperature superconducting three-phase alternating-current cable under the condition of the same occupied area.

Description

technical field [0001] The invention relates to a high-temperature superconducting three-phase AC cable and belongs to the field of superconducting engineering. Background technique [0002] With the continuous development of my country's economy, the national power consumption continues to increase, and the scale of my country's power system also continues to expand. In this case, for some first-tier cities with small planning space and dense population, land space resources Appears to be extremely important. In this case, using high-temperature superconducting materials whose working temperature is raised to 77 K in liquid nitrogen to transmit current through superconducting cables can effectively solve this dilemma. Due to the advantages of low operating loss, large transmission capacity, no environmental pollution, and less land occupation, high-temperature superconducting three-phase AC cables are of great significance in the construction of new power systems and the tr...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compact high-temperature superconducting three-phase AC cable to increase the ampacity of existing high-temperature superconducting AC cables

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