Superconducting tape with quenching detection protection, superconducting cable and protection method

Abstract

The invention provides a superconducting tape with quench detection protection, a superconducting cable and a protection method. The superconducting tape with quench detection protection comprises a first superconducting tape and a second superconducting tape, wherein a substrate layer of the first superconducting tape is connected with a substrate layer of the second superconducting tape; the width of the first superconducting tape is smaller than that of the second superconducting tape; the first superconducting tape and the second superconducting tape are respectively and independently supplied with power, and when the second superconducting tape is normally excited, a working voltage of the first superconducting tape is controlled, so the working current of the first superconducting tape is kept within a preset range about to quench. According to the superconducting tape, local quenching of the superconducting tape can be rapidly and accurately detected, so the whole system can be protected in time.

Description

technical field [0001] The invention relates to the field of superconducting technology, in particular to a superconducting tape with quench detection and protection, a superconducting cable and a protection method. Background technique [0002] The second-generation superconducting strip is generally produced on a nickel-based alloy substrate by a multi-layer coating process because ReBCO, which is the core of the superconducting current-carrying core, is hard and brittle, so it is also called a coated conductor. The second-generation superconducting tape generally consists of a base tape, a buffer layer (transition layer), a superconducting layer and a protective layer. The thickness of the superconducting tape is generally 50-300 microns, and the width is generally 4-12 mm. Therefore, the second-generation high-temperature superconducting tape is a tape structure with an ultra-high aspect ratio. The current-carrying capacity of a single high-temperature superconducting ...

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Problems solved by technology

However, the main problem with these two methods is that if the initial location of the quench is not the temperature measurement point, it is difficult to detect the quench in time.

If there are too many pre-buried temperature measurement points, the process complexity and difficulty of the superconducting cable will increase sharply

In addition, there are acoustic wave detection, based on the stress detection method, etc., these methods are not very mature at present, still in scientific research

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