Phased ultrasound locating method and system of partial discharge of transformer

A partial discharge and ultrasonic positioning technology, applied in the direction of testing dielectric strength, etc., can solve the problems of limited time-domain analysis, low precision, and inability to effectively measure signals on site, and achieve a simple and easy-to-use method and a simple structure Effect

Inactive Publication Date: 2010-05-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF0 Cites 62 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problem of this method is that the sensitivity of the ultrasonic sensor is very low, and the signal cannot be effectively measured on the spot; secondly, the anti-electromagnetic interference ability of the sensor is poor, and the ultrasonic

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
  • Phased ultrasound locating method and system of partial discharge of transformer
  • Phased ultrasound locating method and system of partial discharge of transformer
  • Phased ultrasound locating method and system of partial discharge of transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Aiming at the shortcomings of the current traditional ultrasonic partial discharge detection method, the present invention aims to provide a localization system and method for broadband array signal processing of transformer partial discharge.

[0041] The invention uses a phased array ultrasonic sensor to receive partial discharge ultrasonic broadband signals to form an array model, and uses the broadband focusing, narrowband direction finding and cross positioning algorithms in the broadband array signal processing algorithm to realize the positioning and detection of partial discharge for accurate evaluation. Transformer partial discharge location and maintenance strategy provide effective reference.

[0042] In order to achieve the above object, the specific technical solutions provided by the invention are as follows:

[0043] 1. Phase-controlled ultrasonic positioning system for transformer partial discharge.

[0044] The positioning system is composed as follows...

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 a phased ultrasound locating method of the partial discharge of a transformer, which is used for monitoring and locating partial discharge faults. Phased array ultrasound sensors arranged at two different positions of the transformer are adopted to receive ultrasound broadband signals sent out by a partial discharge source, and an array model is formed; then a broadband focus algorithm in a broad-ban array signal processing algorithm is applied to convert broadband signals received by the two phased array ultrasound sensors into narrow-band signals, then a narrow-band direction finding algorithm is applied to respectively carry out direction of arrival (DOA) estimation on the two narrow-band signals, and finally a cross locating algorithm is applied to determine the concrete position of the partial discharge. Meanwhile, the invention also discloses a locating system. The invention can carry out on-line accurate locating on the partial discharge in the transformer; moreover, the used locating system has simple structure, and the method is simple and easy to apply.

Description

technical field [0001] The invention relates to a detection device for monitoring the partial discharge position of a power transformer, belonging to the technical field of detection. Background technique [0002] With the development of productivity, the requirements for the reliability of the power system operation are getting higher and higher, and the power transformer is the key equipment in the power system, and its operation reliability is directly related to the safety and stability of the power system. Statistical analysis of actual faults shows that insulation faults are the main reason affecting the normal operation of transformers, and partial discharge is an important cause of insulation faults. [0003] At present, the development of condition-based maintenance of power equipment has become an inevitable trend, and accurate localization of partial discharge not only plays an important auxiliary role in the assessment of the degree of damage of partial discharge...

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): G01R31/12
Inventor 李燕青谢庆律方成谢红玲赵涛
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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