A high temperature superconducting cable temperature measurement system

Abstract

The invention discloses a high-temperature superconducting cable temperature measurement system, which is applied to interconnected high-temperature superconducting cables and terminal cooling systems. The thermal resistance in the thermal resistance; the optical fiber temperature measurement host, used to receive the temperature measurement information from each measurement point of the low temperature measurement optical fiber; the thermal resistance temperature monitor, used to receive the temperature information from the thermal resistance; the temperature measurement control device, which receives The temperature measurement information and temperature information are evaluated and judged according to the temperature measurement information and temperature information to determine the protection action and protection area of ​​the cable operation control host connected to it, and control the cable operation control host to perform corresponding operations. The invention has the characteristics of convenient use and simple structure, can accurately monitor and locate temperature abnormal points along the high-temperature superconducting cable, is convenient for troubleshooting during superconducting cable maintenance and testing, narrows the scope of failure, and reduces the time for troubleshooting.

Description

technical field [0001] The invention relates to the application field of power transmission technology, in particular to a high-temperature superconducting cable temperature measurement system. Background technique [0002] With the rapid development of my country's economy, the electricity consumption in many cities is increasing year by year, the power load in the central area of ​​the city has increased sharply, the transmission and distribution capacity has increased significantly, and issues such as reducing power grid losses and improving power grid operation stability have also been raised. At present, the power grid system has a lot of losses in the power transmission and distribution link, so all countries are looking for solutions to reduce power grid losses, among which superconducting materials are one of the most important solutions to reduce power grid losses, and the commercial production of high-temperature superconducting strips has promoted superconductivity...

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Problems solved by technology

[0005] (2) The high-temperature superconducting cable runs in liquid nitrogen, so its structure is quite different from that of conventional power cables. Its size is smaller and its structure is more compact. As a result, traditional temperature sensors such as thermal resistors and thermal resistors cannot be installed in superconducting cables. Monitor the temperature along the conductive cable (the insulation performance of the cable is damaged and the temperature measurement performance of the temperature sensor is interfered by electromagnetic interference)

[0006] The above two points limit the popularization and application of high-temperature superconducting cables in power grids, and because of the above-mentioned difficulty two, the current temperature monitoring range of superconducting cable systems is limited to the temperature monitoring of the terminal cooling system, and there has not been any temperature monitoring along the high-temperature superconducting cables. Measurement

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