Power transformer fault diagnosis device and method based on vibration signals

Abstract

The invention provides a power transformer fault diagnosis device and method based on vibration signals, and relates to the technical field of high-voltage power equipment. The device comprises a vibration signal acquisition module with multiple measuring points, a vibration signal optimization module internally connected with a power supply, a vibration signal online post-processing module, a normal and abnormal display end and a fault alarm. The vibration signal acquisition module uses a piezoelectric vibration sensor to measure a vibration signal of a transformer box body and transmits the vibration signal to the vibration signal optimization module, and the vibration signal optimization module optimizes the vibration signal and then transmits the vibration signal to the vibration signal online post-processing module. The vibration signal online post-processing module stores the processed vibration signal data, performs data visualization processing and data comparison analysis, and then transmits the processed vibration signal data to the frequent and abnormal display terminal and the fault alarm, the frequent and abnormal display terminal displays a vibration ripple diagram of the vibration signal, and the fault alarm performs voice broadcast on a fault state.

Description

technical field [0001] The invention relates to the technical field of high-voltage power equipment, in particular to a vibration signal-based power transformer fault diagnosis device and method. Background technique [0002] As an important equipment in high-voltage power equipment, power transformers play a vital role in the power transmission and transformation system. If the power transformer fails during operation, it will not only hinder its own operation, but also cause the power transmission and transformation system to fail. damage to the grid, affecting the stability, security, and economy of the power grid. Therefore, it is necessary to grasp the operating status of power transformers in real time and detect existing faults in time, so that operation and maintenance personnel can take corresponding measures in time to reduce the losses caused by accidents. [0003] Existing fault diagnosis methods for power transformers: frequency response analysis method, short-...

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Problems solved by technology

[0003] Existing fault diagnosis methods for power transformers: frequency response analysis method, short-circuit impedance method, oil chromatographic analysis method, etc. need to carry out core lifting operations on power transformers, with a large number of equipment and complicated operations

At present, most of the vibration method research conducted by researchers on power transformers is still performed on the core of the transformer, and the iron core and winding are studied separately to determine the corresponding faults. Diagnosis of faults in the context of the overall structure of power transformers

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