Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

On-line power transformer winding deformation monitoring method based on Lissajous characteristics

A technology for deformation of power transformers and windings, which is applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement devices, etc., and can solve problems such as deformation faults of transformer windings

Active Publication Date: 2014-11-19
CHONGQING UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to solve the problem of online monitoring transformer winding deformation fault

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • On-line power transformer winding deformation monitoring method based on Lissajous characteristics
  • On-line power transformer winding deformation monitoring method based on Lissajous characteristics
  • On-line power transformer winding deformation monitoring method based on Lissajous characteristics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0061] A method for on-line monitoring of power transformer winding deformation based on Lissajous characteristics, comprising the following steps:

[0062] 1) For load Z L The input of the normal transformer plus the input voltage After that, measure the normal transformer online output voltage Input Current and output current

[0063] 2) For load Z L 'The input terminal of the transformer under test plus the input voltage After that, measure th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention aims to solve the problem of on-line monitoring of transformer winding deformation failure and provides an on-line power transformer winding deformation monitoring method based on Lissajous characteristics. The invention adopts the technical scheme as follows: the method comprises the following steps: 1), after input voltage U1 is added on the input end of a normal transformer with the load of ZL, the on-line output voltage U2, input current I1 and output current I2 of the normal transformer are measured; 2), after the input voltage U1' is added on the input end of a to-be-measured transformer with the load of ZL', the on-line output voltage U2', input current I1' and output current I2' of the to-be-measured transformer are measured; 3), the output current I2' is corrected, so that the corrected output current I21 is obtained; 4) the data is processed; 5), Lissajous figures of the normal transformer and the to-be-measured transformer are constructed; 6), the characteristic values of Lissajous figures of the normal transformer and the to-be-measured transformer are extracted; 7), contrastive analysis is performed on the characteristic values of the Lissajous figures of the normal transformer and the to-be-measured transformer.

Description

technical field [0001] The invention belongs to the field of deformation fault detection of power transformer windings. Background technique [0002] The transformer is one of the most important equipment in the power system. It undertakes important functions such as power conversion and transmission, and is the hub of the entire power grid. Therefore, the normal operation of the transformer is directly related to the reliable operation of the entire power grid. Winding deformation fault is one of the most important fault types of transformers, and it is a cumulative process. Therefore, monitoring winding deformation faults is an important means to ensure the normal operation of transformers. [0003] In the field of transformer winding deformation fault detection, detection methods such as short-circuit reactance method, winding capacitance method and frequency response method have been proposed. The technology is relatively mature, and there are already relevant regulatio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
Inventor 姚陈果陈昱李成祥赵仲勇米彦赵晓震陈晓晗李昭炯
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products