Method and system for judging operating state of transformer harmonic load

Abstract

The invention discloses a method and a system for judging the operating state of a transformer harmonic load. The implementation steps of the method include: 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; inputting the independent characteristic parameters into the trained machine learning model; obtaining the current harmonic load operating state of the transformer to be detected, wherein the machine learning model is trained to include a mapping relationship between the independent feature parameters and harmonic load operating states. The system comprises a computer device programmed to perform the aforementioned method. The method and the system can effectively detect the operating state of the transformer harmonic load, will not contact a charging device, are convenient to operation, and are high in detection efficiency.

Description

technical field [0001] The invention relates to the field of transformer operation state detection, in particular to a method and system for judging the operation state of a transformer harmonic 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. Its safe operation is of great significance to provide stable and reliable power supply to power users. With the popularity of frequency converters in household appliances (such as air conditioners, refrigerators, etc.), the harmonic content of transformer loads has generally been at a relatively high level. The increase of load harmonic content leads to the increase of transformer loss, which leads to the increase of transformer temperature, noise and vibration. The long-term operation of the transformer with high harmonic load may easily cause insulation damage and inter-turn short circuit, th...

AI Technical Summary

Problems solved by technology

At present, current transformers are generally used to measure transformer harmonic currents. This method requires pre-installed sensors on the transformer busbar, and often requires manual on-site inspection and direct contact with live equipment, which has certain potential safety hazards.

There are a large number of transformers and a wide distribution range, and many personnel and equipment are required for inspection. In addition, many transformers are not pre-installed with current transformers before they are put into operation. As a result, operators cannot directly understand the load harmonic conditions and operating conditions of transformers, which is not conducive to Safe and reliable operation of transformers

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