A method and system for judging transformer winding deformation

Abstract

The invention discloses a method and a system for judging the deformation of a transformer winding. The method comprises the steps: acquiring a vibration acceleration signal of a to-be-detected transformer; extracting independent characteristic parameters according to the vibration acceleration signal of the to-be-detected transformer; inputting the independent characteristic parameters into a trained machine learning model to obtain a current winding deformation state of the to-be-detected transformer, wherein the machine learning model is trained to include a mapping relationship between theindependent feature parameters and the winding deformation state. The system includes a computer device programmed to execute the above method. The method and system can effectively detect the deformation state of the transformer winding under the condition that the transformer is not stopped, and have the advantages that the system does not make contact with an electrified device and can achievethe live-line detection, and the test is convenient and efficient.

Description

technical field [0001] The invention relates to the field of transformer operation state detection, in particular to a method and system for judging transformer winding deformation. Background technique [0002] Transformer is an important part of the power system, which undertakes the task of power transmission between power networks of different voltage levels. Its safe operation is of great significance to provide stable and reliable power supply to power users. Transformer windings are one of the most frequently failed components. As of the end of 2006, the number of damage accidents caused by external short-circuit faults in 110kV and above power transformers in the country reached 50% of the total number of accidents. Judging from the dismantling of the transformer after the accident, the transformer faults caused by winding deformation accounted for the vast majority. Therefore, it is necessary to effectively detect the deformation of the transformer winding. At p...

AI Technical Summary

Problems solved by technology

At present, commonly used transformer winding deformation detection methods include winding capacitance, winding frequency response, and short-circuit impedance tests. All of the above methods require the transformer to be shut down. The main problems are that live detection cannot be performed, safety hazards are large, the detection cycle is long, and the detection efficiency is high. low level problem

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