Bare conductor thermal state early warning method and system

Abstract

The embodiment of the present invention provides a method and system for early warning the heat condition of a bare conductor and belongs to the field of power system monitoring. The method comprises:acquiring the real-time temperature, the real-time wind power, the real-time illumination intensity of a current environment, and the real-time current value of the bare conductor; determining, according to the real-time temperature, the real-time wind power, and the real-time illumination intensity of the external environment, the no-load current-free temperature rise value of the bare conductorin the current environment; calculating the sum of the real-time temperature of the external environment and the no-load current-free temperature rise value of the bare conductor in the current environment to obtain the no-load operating temperature of the bare conductor; determining the theoretical temperature of the bare conductor; acquiring the actual temperature of the bare conductor; determining the contact resistance value of the bare conductor and a fixing wire clamp; and giving an early warning when the contact resistance value of the bare conductor and the fixing wire clamp is greater than a set threshold. The method and system for early warning the heat condition of a bare conductor can timely detect the potential overheating danger of the bare conductor and provide the early warning.

Description

technical field [0001] The invention relates to power system monitoring, in particular to a bare conductor thermal state early warning method and system. Background technique [0002] A large number of bare conductors are used in railway catenary and substations, such as catenary copper wire, catenary steel-cored aluminum stranded wire, and soft busbars in substations are also made of steel-cored aluminum stranded wire. Continued heating of bare conductors will cause broken strands and scattered strands, threatening the safety of railway transportation. Therefore, in the daily inspection and maintenance work of catenary and substations, it is an important task to find and deal with the overheating of bare conductors in time. The thermal monitoring of conductors mainly relies on infrared thermometers or online monitoring systems. These two monitoring methods can only determine whether the thermal state of bare conductors is within the normal range by analyzing the temperature...

AI Technical Summary

Problems solved by technology

Continued heating of bare conductors will cause broken strands and loose strands, threatening the safety of railway transportation. Therefore, in the daily inspection and maintenance work of catenary and substations, it is an important task to find and deal with the overheating of bare conductors in time. The thermal monitoring of conductors mainly relies on infrared thermometers or on-line monitoring systems. These two monitoring methods can only determine whether the thermal state of bare conductors is within the normal range by analyzing the temperature. On the issue of temperature rise, the temperature online monitoring system has great limitations

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