Transformer winding deformation online monitoring method and device based on transient traveling wave

A technology of transformer windings and transient traveling waves, which is applied in the direction of measuring devices, electric winding testing, electromagnetic measuring devices, etc., to achieve the effects of improving accuracy, improving maintenance efficiency, and simple structure

Active Publication Date: 2019-03-08
武汉云侦科技有限公司
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Problems solved by technology

[0005] In view of this, in view of the shortcomings of the above transformer winding deformation detection method, the present invention proposes an online transformer winding deformation monitoring method based o

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  • Transformer winding deformation online monitoring method and device based on transient traveling wave
  • Transformer winding deformation online monitoring method and device based on transient traveling wave
  • Transformer winding deformation online monitoring method and device based on transient traveling wave

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[0038]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be made below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, and Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] In a preferred embodiment of the present invention, a transformer winding deformation online monitoring method based on transient traveling waves is provided, refer to figure 1 , including the following steps:

[0040] Step 1: Real-time collection of transient traveling wave signal sets at the input and output ends of the transformer winding;

[0041] Step 2: Identify and classify the mea...

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Abstract

The invention relates to a transformer winding deformation online monitoring method and device based on a transient traveling wave. The method comprises the following steps of installing traveling wave measuring sensors on the high voltage side casing pipe and the low voltage side casing pipe of a transformer, and monitoring and collecting the transient traveling wave signals of the input and output ends of a transformer winding in real time; when the transformer winding is normal, identifying and classifying the transient wave signals of the input end, and carrying out wavelet packet decomposition characteristic extraction on the response signal of the output end so as to establish a big data sample library; according to a current real-time measured transient traveling wave signal identification result, calling a response sample under the effect of the same type of transient signals in the sample library to compare with a current response, and calculating a correlation coefficient; and using a correlation coefficient threshold to judge the deformation of the winding. In the invention, transformer winding deformation can be monitored in an online mode, anti-interference performanceis good and accuracy is high.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of electric power equipment, in particular to an on-line monitoring method and device for transformer winding deformation based on transient traveling waves. Background technique [0002] In recent years, with the continuous expansion of the capacity of my country's power grid and the rapid economic growth, the requirements for the safe and stable operation of the power grid have become higher and higher. Transformers are one of the important equipment in the power system, and their safe and stable operation is related to the reliability of the power supply system. . When the transformer suffers from the short-circuit impact of the outlet, the winding may bear a large force under the action of large current and strong magnetic field, which may easily cause the winding to be bulged, twisted, dislocated, and other deformations to varying degrees, which may result in long-term accumulation....

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Application Information

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IPC IPC(8): G01B7/16G01R31/06
CPCG01B7/16G01R31/72
Inventor 杜富豪叶宝安
Owner 武汉云侦科技有限公司
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