Self-shielding cold-insulation direct-current high-temperature superconducting current-limiting cable

Abstract

The invention discloses a self-shielding cold-insulation direct-current high-temperature superconducting current-limiting cable which comprises a cooling channel, a cable skeleton, a semiconductor layer, a superconducting layer, an insulating layer and a protective layer. The cooling channel is located in the center of the cable skeleton, the semiconductor layer is arranged outside the cable skeleton, and a superconducting odd layer n is arranged outside the semiconductor layer; a superconducting even number layer 2n is arranged outside the superconducting odd number layer n, the semiconductorlayer and the insulating layer are sequentially arranged between the superconductive odd-number layer n and the superconductive even-number layer 2n from inside to outside, and the protective layer is arranged on the outermost superconducting layer. The current running directions of the superconductive odd-number layer n and the superconductive even-number layer 2n are opposite, and the strip winding directions are the same. The current running directions of the adjacent superconductive odd-number layer n and the superconductive even-number layer 2 (n + 1) are the same, and the strip windingdirections are opposite. The self-shielding cold-insulation direct-current high-temperature superconducting current-limiting cable of the scheme has the advantages of dual functions of transmission and current limiting, self-shielding and no electromagnetic interference, does not need to connect a superconducting current limiter, and enables the device cost and the operation and maintenance cost to be reduced.

Description

technical field [0001] The invention relates to the field of superconducting engineering technology, in particular to a self-shielding cold-insulated DC high-temperature superconducting current-limiting cable. Background technique [0002] With the development of high-temperature superconducting technology, the operating temperature of superconductors has been raised to the liquid nitrogen temperature region (77K). High-temperature superconducting cables are one of the important applications of high-temperature superconducting technology in power systems, which can realize large-capacity and low-loss power transmission. High-temperature superconducting cables are developing towards practicality and industrialization. [0003] When a short-circuit fault occurs in the line of the DC power system, a large short-circuit current will be generated, and sometimes it will cause huge damage to the power system. At present, in the line of the superconducting cable, the solution is to...

AI Technical Summary

Problems solved by technology

However, the use of the current limiter increases the construction cost of the line, and also increases the maintenance cost of the line in the later stage

With the increase of the number of superconducting layers, the magnetic field received by each superconducting layer will also affect the critical current of each layer, thereby affecting the use efficiency of superconducting strips and making the cost too high

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