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

Method for detecting post insulator cracks based on vibration acoustics

A post insulator and detection method technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve problems such as power grid outages, national economic losses, and failure to find equipment insulation defects, etc., to achieve less investment, reduce maintenance times, and reduce The effect of training costs

Active Publication Date: 2011-06-15
HEILONGJIANG ELECTRIC POWER RES INST +1
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the preventive test voltage is far lower than the actual operating voltage, it is often impossible to find equipment insulation defects; and regular power grid outages will cause losses to the national economy

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
  • Method for detecting post insulator cracks based on vibration acoustics
  • Method for detecting post insulator cracks based on vibration acoustics
  • Method for detecting post insulator cracks based on vibration acoustics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] For the post insulator (1) to be tested, under the control of the sound wave emission / recording / control unit (2), the sound wave of a certain frequency is emitted by the excitation sound wave emission contact (3) to the post insulator (1) to be tested, so that The post insulator (1) to be tested is forced to vibrate, and the continuous sound wave of the forced vibration emitted by the post insulator (1) to be tested is received by the reaction sound wave receiving contact (5), and the sound wave emission / recording / control unit ( 2) Make a record, and then transmit the data to the computer (5) by the sound wave emission / recording / control unit (2), form the sound wave spectrum in the computer, input the pre-established internal crack discrimination function of the post insulator, and obtain the internal crack of the post insulator Judgment: if figure 2 It is the assessment diagram of the vibration power spectral density of the pillar insulation in good condition; image...

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 provides a method for detecting post insulator cracks based on vibration acoustics, which belongs to the field of electric transmission and in particular relates to a method for detecting post insulator cracks based on vibration acoustics. The method comprises the following steps of: (1) exciting post insulators to be detected one by one with acoustic waves in a frequency spectrum range of 1000-10000Hz and detecting the forced vibration inherent frequency of the insulators; and (2) inputting the detection results of the continuous forced vibration acoustic wave frequency spectrum of the detected post insulators into post insulator internal crack judgment functions previously established to judge the internal cracks of the post insulators. The method can carry out site live line monitoring on the post insulators. During detection, as long as continuous acoustic wave collection is carried out on the post insulators once, the internal cracks of the post insulators can be detected respectively through various judgment functions previously established.

Description

technical field [0001] The invention belongs to the field of power transmission, and in particular relates to a detection method for detecting cracks of post insulators based on vibroacoustics. Background technique [0002] The insulation state of power equipment is very important to the safe operation of the power system. For a long time, the power system has used the traditional periodic test method (called preventive test) to detect the insulation of high-voltage equipment. However, since the preventive test voltage is far lower than the actual operating voltage, it is often impossible to find equipment insulation defects; and regular power grid outages will cause losses to the national economy. Since the 1980s, a new monitoring technology has been developed on the basis of live measurement technology at home and abroad-------on-line detection and diagnosis technology of electrical equipment insulation. It can measure the insulation parameters of the monitored equipment ...

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): G01N29/12
Inventor 池永斌孙国强宋朝晖
Owner HEILONGJIANG ELECTRIC POWER RES INST
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com