Impulse response analytical test apparatus and method for detecting deformation of transformer winding

A technology of transformer winding and impulse response, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc.

Inactive Publication Date: 2010-05-05
CHONGQING UNIV
View PDF1 Cites 45 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a pulse high-frequency testing device and method for detecting slight deformation of transformer windings in view of the defici

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
  • Impulse response analytical test apparatus and method for detecting deformation of transformer winding
  • Impulse response analytical test apparatus and method for detecting deformation of transformer winding
  • Impulse response analytical test apparatus and method for detecting deformation of transformer winding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as figure 1 As shown, an impulse response analysis test device for detecting transformer winding deformation mainly includes a pulse generator 1, a broadband digital oscilloscope 6, a high-voltage probe 5, a computer 7, a first-end signal impedance matcher 3, an end signal impedance matcher 4, Coaxial shielded cable 2.

[0047] Pulse generator 1 is a commercially available EFT-2003 group pulse generator, which instantly generates a repetitive exponential pulse voltage with an adjustable amplitude of 200~4500V, an adjustable repetition frequency of 100Hz~1MHz, a rising edge of 5ns, and a half pulse width of 50ns wave. The pulse generator 1 is connected to the head-end signal impedance matcher 3 through a coaxial shielded cable 2. The head-end signal impedance matcher 3 is connected to one end of the tested winding of the tested transformer 8 through a voltage clamp on it, and is connected to the end signal impedance matcher 4 through a coaxial shielded cable 2. The t...

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 relates to impulse response analytical test apparatus and method for detecting deformation of transformer winding, belonging to the technical field of transformer winding detection. The apparatus mainly comprises an impulse generator, a broadband digital oscilloscope, a computer, a high-voltage probe, a head end signal impedance matching device, a tail end signal impedance matching device and a screened coaxial cable. In the method, site test and analysis are carried out by using the apparatus. The invention has the advantages of high test sensitivity, rapid detection, strong capacity of resisting disturbance and flexible analytical method, and can detect slight deformation of the transformer winding and judge early potential faults effectively with high judging accuracy. The invention can be widely applied to the detection of the deformation of the transformer winding and the state overhauling.

Description

Technical field [0001] The invention belongs to the technical field of transformer winding detection, and specifically relates to a detection device and method for transformer winding deformation. Background technique [0002] Transformer is the main electrical equipment in the power system, and its normal operation is of great significance to the safe production and reliability of the power system. Transformers will inevitably suffer various short-circuit faults during operation. The transformer windings will withstand the huge and uneven electrodynamic force generated by the short-circuit current, which will lead to distortions, bulging or displacement of the windings. According to statistics, about 1 / 4 of transformer faults are caused by winding deformation. With the development of power system relay protection technology and devices, the short-circuit current that the transformer bears and its duration are greatly limited. The deformation of the transformer winding caused b...

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
IPC IPC(8): G01R31/06G01R1/20
Inventor 李剑杜林廖瑞金王有元陈伟根唐炬张晓星夏珩轶
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap