Benchmark data measuring device for power cable fiber temperature measurement

Abstract

The invention relates to a benchmark data measuring device for power cable fiber temperature measurement. The benchmark data measuring device comprises a circular heating system console, an electrical control cabinet, an induction regulator, a strong-current generator, a distributed fiber temperature measuring device, a computer and a cable to be detected. By means of a temperature measurement fiber spirally wound on a sheath of the cable to be detected, temperature data of the sheath loaded at different currents are acquired, accuracy is improved by matching, cable core temperature and sheath temperature at different current loads can be acquired through a thermocouple, and since temperature data measured by the thermocouple are good in stability and can be used as reference standards to correct results of the temperature measurement fiber, accurate contrast relation corresponding to the fiber core temperature and the load current is acquired when the temperature measurement fiber measures the sheath temperature actually, and internal operation state of the cable can be acquired by measuring the sheath temperature of the temperature measurement fiber.

Description

technical field [0001] The invention belongs to the technical field of power cable optical fiber temperature measurement, in particular to a power cable optical fiber temperature measurement reference data measuring device. Background technique [0002] With the continuous development of urbanization construction, there are more and more high-voltage switchgears and substations in power grid construction. A large number of power cables and control cables are laid in these facilities and equipment. The cables are distributed in cable tunnels, cable bridges, and cable interlayers. During the long-term operation of the cable, the current flowing through the core will generate heat. When the heat accumulates too much and burns, it will cause damage to the concentratedly laid cables, affect the normal use of the power system, and endanger the electricity safety of power companies or users. In order to solve this problem, people are gradually adopting the optical fiber temperature...

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Problems solved by technology

[0003] From the above description, we can see that some old power cables do not have temperature-measuring optical fibers, so we can only wind the temperature-measuring optical fibers on the outer sheath of the power cables during actual use, and then use distributed optical fiber thermometers to read temperature information, but this method Only the temperature at the outer sheath of the power cable can be obtained, and the temperature of the inner core and the passing load current cannot be known. It can be seen that the existing method of directly using the external winding temperature measurement optical fiber to measure the temperature can only obtain indirect temperature data, which is not conducive to power supply. safe work with cables

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