Method and device for on-line monitoring high temperature superconducting cable conductor temperature

Abstract

The invention relates to an online monitoring method and a device for the temperature of a high-temperature superconducting cable conductor. The method provided by the invention comprises the following steps of: adhering a low-temperature sensor (2) onto the high-temperature superconducting cable conductor (1), and leading out the test leads of the low-temperature sensor (2) through a four-lead method; leading the test leads of the low-temperature sensor (2) into a corresponding temperature optical fiber conversion module (3); connecting the temperature optical fiber conversion module (3) and a modularized distribution type I / O system (4); connecting the modularized distribution type I / O system (4) to a computer (6); processing the input signal in the computer, and displaying and storing the temperature of the high-temperature superconducting cable conductor (1). The online monitoring method and the device provided by the invention can carry out the accurate temperature monitoring of the high-temperature superconducting cable conductor in a liquid nitrogen temperature range, and simultaneously realize high-voltage isolation monitoring. The online monitoring method and the device provided by the invention have the advantages of good insulation and anti-interference property, simple structure, reliable run, low electricity consumption, long service life and low cost.

Description

technical field [0001] The invention relates to the application field of high-temperature superconducting cables, in particular, the invention relates to a method and a device for on-line monitoring of the temperature of a conductor of a high-temperature superconducting cable. Background technique [0002] According to the normal working temperature of superconducting cable conductors, superconducting cables can be divided into high-temperature superconducting cables and low-temperature superconducting cables. Low temperature superconducting cable conductors use NbTi, Nb 3 Sn and other low-temperature superconducting tapes are wound and processed, and their conductors work near the liquid helium temperature zone (4.2K); high-temperature superconducting cable conductors are wound and processed by high-temperature superconducting tapes such as Bi series and Y series. Its conductor works in the liquid nitrogen temperature zone of about 77K. According to the different voltage ...

AI Technical Summary

Problems solved by technology

[0007] 1. Existing monitoring devices are generally difficult to achieve accurate temperature monitoring at low temperatures, and the data they obtain during the monitoring of cable status generally have large errors;

[0008] 2. It is generally difficult for existing monitoring devices to achieve high-voltage isolation while monitoring, but for high-temperature superconducting cables that transmit large currents, achieving high-voltage isolation is an important guarantee for safe monitoring;

[0009] 3. Existing monitoring devices can transmit temperature measurement signals over a short distance, but if the temperature measurement signals are transmitted over a long distance, signal distortion is likely to occur, and it is difficult to receive a stable and real signal at the receiving end

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