Quasi-isotropic high-current-carrying superconducting cable power-on conductor

Abstract

The embodiment of the invention discloses a quasi-isotropic high-current-carrying superconducting cable power-on conductor, which comprises a skeleton, superconductors, metal covering layers, an insulating layer, a shielding layer and a protective shell arranged from inside to outside. The skeleton is a hollow metal skeleton, and an inner cooling channel and an outer cooling channel are formed along the axis of the hollow part of the skeleton. Multiple channel grooves which are longitudinally spiral on the whole are arranged uniformly and at intervals along the circumference of the outer surface of the skeleton. Superconductors are stacked in the channel grooves. The superconductor in each channel groove is covered with a metal covering layer. The insulating layer is wound on the outer surface of the skeleton covered with the metal covering layers. The shielding layer is arranged on the outer surface of the insulating layer. The shielding layer is grounded at a single end or at both ends. The protective shell is arranged outside the shielding layer. According to the embodiment of the invention, the superconductor has good isotropy, large carrying capacity, good fixing effect and good cooling effect.

Description

technical field [0001] The invention relates to the field of superconducting transmission, in particular to a quasi-isotropic high current-carrying superconducting cable electric conductor. Background technique [0002] High-temperature superconducting cables Compared with conventional cables, high-temperature superconducting cables have the advantages of high current-carrying capacity, compact structure, and small transmission loss. They have development potential in large-scale power transmission or line expansion under restricted corridors. Superconducting cables with high transmission voltage and large current-carrying capacity have good application prospects. [0003] Due to the limited current-carrying capacity of a single strip, the parallel application of multiple strips can increase the current density, so the parallel use of multiple strips has become an inevitable trend in the development of superconducting cable conductors. With the application of the second-gen...

AI Technical Summary

Problems solved by technology

With the application of the second-generation superconducting tape, countries around the world have successively studied several twisted stacked superconducting cable structures, which can greatly improve the current-carrying capacity, but each section still has the disadvantage of anisotropy under the external magnetic field, and the distortion The shape cannot be fixed, and it is easy to move in the pipeline

In terms of refrigeration, the conventional cable directly leaves a liquid nitrogen channel, and nitrogen gas is introduced into the pipeline for pre-cooling. After the pipeline drops to a certain temperature, liquid nitrogen is introduced. This method causes a lot of waste of nitrogen gas.

Images