Switch cabinet contact temperature early warning value calculation method

Abstract

The invention relates to a switch cabinet contact temperature early warning method, which tracks, records and analyzes contact operation temperature data and aging states for a long time, and independently carries out early warning according to the relation between the bearing temperature and time of each detected contact. The method is characterized in that a temperature early warning system performs aging evaluation on a contact by using historical temperature data of the contact, calculates a limit time function which can be borne by the contact in an existing performance state at different temperatures, and performs early warning judgment according to the limit time function. According to the method, the intelligence and accuracy of the contact temperature early warning system can be improved, the service life of the contact is prolonged, the operation and maintenance work is simplified, and the stability and economy of a power grid system are improved.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical equipment monitoring, and in particular relates to a method for early warning of the temperature of a switch cabinet contact. [0002] technical background [0003] The traditional electrical equipment temperature early warning method is to manually set the threshold according to the temperature range allowed by the original material of the tested equipment components and the temperature range of the equipment components known from work experience, and compare with the actual temperature of the tested equipment. The long-term operation of the equipment and its materials, the effect of aging on the temperature rise and the ability to withstand temperature are not considered, especially the complex structure and operating environment of the switch cabinet contacts lead to different allowable operating times at different temperatures. The above temperature warning method is simple and ...

AI Technical Summary

Problems solved by technology

[0003] The traditional electrical equipment temperature early warning method is to manually set the threshold according to the allowable temperature range of the original material of the tested equipment component and the temperature range of the equipment component known from work experience, and compare it with the actual temperature of the tested equipment. The influence of long-term operation and aging of the equipment and its materials on temperature rise and temperature resistance is not considered, especially the complex structure and operating environment of the switchgear contacts lead to different allowable operating times at different temperatures

The above-mentioned temperature early warning method is simple and fixed, not targeted, and not accurate enough, which is beneficial to operation and maintenance work

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