Method and device for diagnosing mechanical state characteristics of on-load tap changer of transformer

Abstract

The application discloses a method for diagnosing the mechanical state characteristics of the on-load tap changer of a transformer, which includes the following steps: using a vibration probe to collect a vibration signal generated by the on-load tap changer of a transformer in the operation process; de-noising the vibration signal to get a vibration waveform; intercepting part of the vibration waveform through a short-time energy method, and obtaining the vibration waveform in the switching process; extracting a waveform characteristic value from the vibration waveform in the switching process; and using a RVM classification model to carry out fault diagnosis according to the waveform characteristic value. Through the method, the problems such as long inspection cycle, heavy workload andwaste of manpower and material resources caused by regular inspection and troubleshooting are solved, sudden failure is reduced, and safe and stable operation of transformers is ensured. The application further discloses a device for diagnosing the mechanical state characteristics of the on-load tap changer of a transformer, a piece of equipment and a computer readable storage medium, which all have the beneficial effects.

Description

technical field [0001] This application relates to the technical field of on-line monitoring of high-voltage electrical equipment, in particular to a diagnostic method for the mechanical state characteristics of transformer on-load tap-changers, and also relates to a diagnostic device, equipment and computer for the mechanical state characteristics of transformer on-load tap-changers readable storage media. Background technique [0002] The power transformer is an important power conversion equipment in the power grid, and the stability of its operation directly affects the safety of the power system. On-Load Tap Changer (OLTC) is the only movable part inside the transformer. Its accurate and timely action can not only improve the voltage deviation and improve the power quality, but also change the power flow distribution of the power system and increase the power grid. Scheduling flexibility. However, with the increase in the number of operations, the failure rate also in...

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Problems solved by technology

[0005] The purpose of this application is to provide a diagnostic method for the mechanical state characteristics of transformer on-load tap-changers, which effectively solves the problems of long detection period, heavy workload and waste of manpower and material resources caused by regular inspection and troubleshooting, and further ensures The safe and stable operation of the transformer is ensured; another object of the present invention is to provide a diagnostic device, equipment and computer-readable storage medium for the mechanical state characteristics of the transformer on-load tap changer, all of which have the above-mentioned beneficial effects

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