Transformer fault diagnosis method and device based on vibration striples

Abstract

The invention relates to a transformer fault diagnosis method and device based on vibration stripes. The transformer fault diagnosis method based on vibration stripes comprises the steps of acquiringhealthy vibration stripes and inspection vibration stripes of a transformer; calculating the confidence coefficient between the inspection vibration lines and the health vibration lines; and judging whether a transformer fails or not according to the confidence. Misjudgment caused by magnitude change due to load change can be effectively avoided, so that accurate, stable and reliable monitoring ofthe transformer is realized.

Description

technical field [0001] The invention relates to the technical field of fault diagnosis, in particular to a vibration-mark-based transformer fault diagnosis method and device. Background technique [0002] Power equipment is one of the most important devices in modern industrial production. Once the equipment fails, it may cause the entire system to be paralyzed and cause major economic losses. In recent years, more and more attention has been paid to condition monitoring in power systems, and many condition monitoring methods have been proposed for different power equipment in power systems, such as vibration analysis, gas in oil analysis and partial discharge detection. [0003] For the condition monitoring of transformers, since the surface vibration signal of the transformer oil tank is closely related to the mechanical condition of its internal winding and iron core, the measurement and characteristic analysis of the surface vibration signal of the transformer oil tank i...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a vibration-based transformer fault diagnosis method and device for the problem of inaccurate fault monitoring existing in the current single-point measurement method

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