A Method for Extracting the Characteristics of Vibration Acceleration Signals of Surface Measuring Points of Power Transformers

Abstract

A method for extracting vibration acceleration signal characteristics of power transformer surface measurement points, the method uses vibration acceleration sensors to collect vibration signals of power transformer surface measurement points, then obtains the vibration acceleration spectrum of transformer surface measurement points through spectrum analysis, and then calculates The general frequency vibration value near the characteristic frequency point is taken, and finally the eigenvector of the surface vibration signal of the power transformer is calculated by using the obtained general frequency vibration value. The present invention obtains the eigenvector of the vibration signal of the surface measuring point of the power transformer according to the general frequency vibration value of the frequency band near each characteristic frequency point of the vibration spectrum, which is used as the basis for analyzing and judging the operating state of the power transformer by the vibration method, and provides technology for the state monitoring of the power transformer support.

Description

technical field [0001] The invention relates to a feature extraction method for vibration acceleration signals of surface measuring points of a power transformer in operation, and belongs to the technical field of transformers. Background technique [0002] Theoretical research and long-term operation experience show that when the power transformer is running, its surface vibration signal is closely related to the condition of its internal winding and iron core. When the compression state of the power transformer winding and iron core changes, or the winding deforms or displaces, it will cause surface vibration. Changes in the vibration signal. Therefore, the real-time monitoring and analysis of the vibration signals of the surface measuring points of the power transformer can detect and judge the abnormalities and faults of the power transformer core and winding in time. [0003] The effective extraction of vibration signal features of power transformer surface measuring p...

AI Technical Summary

Problems solved by technology

At present, there is no effective extraction method for the eigenvector of the vibration signal on the surface of the power transformer, which cannot fully and effectively reflect the details and degree of the vibration change on the surface of the power transformer. Difficulties in Realizing Vibration Monitoring and State Analysis of Power Transformers

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