Method and system for judging unbalanced load operating state of transformer

Abstract

The invention discloses a method and system for judging an unbalanced load operating state of a transformer. The method includes the steps of acquiring an acoustic signal of a transformer to be detected, extracting independent characteristic parameters according to the acoustic signal of the transformer to be detected, and inputting the independent characteristic parameters into a well trained machine learning model to obtain a current unbalanced load operating state of the transformer to be detected, wherein the machine learning model is trained to include a mapping relationship between the independent characteristic parameters and the unbalanced load operating state; and the system includes a computer device which is programmed to execute the method. The method capable of effectively detecting the three-phase unbalanced load operating state of the transformer has the advantages of no contact with an electrified device and convenience in operation and high detection efficiency.

Description

technical field [0001] The invention relates to the field of detecting the running state of a transformer, in particular to a method and system for judging the running state of a transformer with an unbalanced load. 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. The operation of the transformer under the condition of large unbalanced three-phase load will cause adverse effects on the power grid and the transformer, mainly in the following aspects: ① When the three-phase load is unbalanced, there are differences in the three-phase current, and the neutral line of the grid The generation of unbalanced current, on the one hand, leads to an increase in line loss, on the other hand, it causes the neutral point of the transformer to drift, and the voltage of each phase changes, which is likely to cause the electrical equipment to be burned or unu...

AI Technical Summary

Problems solved by technology

At present, the three-phase load imbalance problem is mainly found by checking the transformer gate meter, but in order to check whether the meter results are accurate, it is often necessary to manually detect the three-phase load current and neutral wire current of the transformer on site

This method mainly has the problems of time-consuming and laborious, and the need to contact with live equipment, especially for distribution transformers with a large number and wide distribution, more personnel and equipment are required for detection

In addition, for remote distribution transformers, there is often a lack of three-phase load unbalance detection means, and load unbalance is often difficult to find and difficult to test, which is not conducive to the safe and reliable operation of the transformer.

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