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

Signal enhanced pressure wave propagation model cable space charge test system

A technology of signal enhancement and space charge, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., to achieve the effect of no temperature limitation, ensure true reliability, and improve signal-to-noise ratio

Active Publication Date: 2015-08-12
NANJING NARI GROUP CORP
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the PEA method has certain limitations in the link of testing temperature.

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
  • Signal enhanced pressure wave propagation model cable space charge test system
  • Signal enhanced pressure wave propagation model cable space charge test system
  • Signal enhanced pressure wave propagation model cable space charge test system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0038] Such as figure 1 As shown, a signal-enhanced pressure wave method model cable space charge test system includes a DC generator 11, a high-voltage lead 12, a stress cone 13, a waveguide 14, a interference suppression resistor 15, a protection resistor 16, a model cable 18, and a capacitor 19. Metal shielding box 20, pulse laser 21, amplifier 22, oscilloscope 23.

[0039] Such as Figure 5 As shown, the protective resistor 16, the model cable 18, and the capacitor 19 are arranged in a metal shielding box 20, the high-voltage lead 12 passes through the wall of the metal shielding box 20, and the waveguide 14 is arranged on the box wall at the entrance of the high-voltage lead 12 Where, the high-voltage lead 12 is connected in series with the interference suppression resistor 15; after the interference suppression resistor 15 is wrapped with a self-a...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Lengthaaaaaaaaaa
Resistanceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a signal enhanced pressure wave propagation model cable space charge test system. The wall of a metal shielding box (20) is provided with a light hole. A pulse laser (21) is arranged at the light hole. The outer semi-conductive shielding layer surface of a model cable (18) is coated with signal reinforcing agents (17). The light emitted by the pulse laser (21) can shine on the signal reinforcing agents (17) through the light hole. The invention provides a specific structure of the pressure wave propagation (PWP) model cable space charge test system. According to the invention, a waveguide tube is mounted at the entrance of a high-voltage lead, an interference removing resistor is serially connected in the high-voltage lead, and the metal shielding box is employed in the system, so that the influence on the space charge test system by external interference signals can be greatly reduced, and a signal-to-noise ratio of the system can be remarkably improved.

Description

Technical field [0001] The invention belongs to the technical field of model cable space charge testing, and specifically relates to a signal-enhanced pressure wave method model cable space charge testing system for model cable space charge testing. Background technique [0002] Under the high DC electric field, the main problem faced by DC cables is that a certain space charge will accumulate in the insulating medium or on the interface. If the space charge density is high enough, the local electric field may even exceed the breakdown electric field of the insulating medium, causing the medium to be destroyed. Space charge testing techniques, including pulsed electro-acoustic (PEA) method, pressure wave propagation (PWP) method, etc., have strongly promoted the research of space charge. At present, the insulation thickness of the cable used for space charge testing is 2-6 mm, which is called a model cable. The PEA method is usually used for space charge testing of model cables. ...

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): G01R29/24
Inventor 李栋朱智恩杨黎明郭世忠
Owner NANJING NARI GROUP CORP
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