Online detection device and method for faults in transformer shell

Abstract

The invention provides an online detection device and method for faults in a transformer shell, wherein the device comprises a refrigeration sheet, a temperature difference power generation unit, a vibration sensor and an ultrasonic unvarnished transmission module; the refrigeration sheet is disposed at the outer side of the shell of a transformer, is used for reducing the temperature of the shell and forms a temperature difference with insulating oil in the transformer; the temperature difference power generation unit is mounted on the inner side of the shell of the transformer, is opposite to the refrigeration sheet in position and is used for generating and outputting temperature difference voltage; the vibration sensor is mounted in the transformer, is connected with the temperature difference power generation unit, supplies power through the temperature difference power generation unit, and is used for detecting the vibration condition in the transformer; and the ultrasonic unvarnished transmission module is used for sending the vibration condition in the transformer to a terminal outside the transformer. The device is simple in structure, the method is convenient to operate, external power supply is not needed, potential safety hazards of transformer operation are reduced, and online detection of faults in the transformer shell is achieved.

Description

technical field [0001] The present application relates to the technical field of measurement equipment, and in particular to an on-line detection device and method for faults in a transformer housing. Background technique [0002] The transformer is an important equipment in the operation of the power system. Once a failure occurs, it will have a great impact on the production and operation of the factory and the daily life of the residents, and it will consume a lot of maintenance time and materials for equipment maintenance personnel. Therefore, real-time monitoring of the working status of the transformer is very important. The operation of the power system is of great significance. [0003] During the long-term operation of the transformer, the winding and iron core will gradually deform or loosen, which will cause failures such as insulation wear and coil deformation, and even make the transformer unable to work or be damaged. The change of winding and iron core mainly...

AI Technical Summary

Problems solved by technology

[0003] During the long-term operation of the transformer, the winding and iron core will gradually deform or loosen, which will cause failures such as insulation wear and coil deformation, and even make the transformer unable to work or be damaged

The change of winding and iron core mainly focuses on the change of vibration. The detection of transformer iron core and winding state currently used in the market is only carried out in the fault maintenance after the transformer is out of service. It is a passive defense mode after the fault occurs. , must be detected by power failure, which belongs to offline detection, and cannot realize the online monitoring function of transformer winding vibration

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