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

Cable series-resonant voltage device with defect location function

A voltage-resistant device and cable technology, which is applied in the field of cable series harmonics, can solve the problems of small stored energy, short holding time of DC oscillating wave boost, and inability to fully stimulate partial discharge, etc.

Inactive Publication Date: 2018-07-24
上海格鲁布科技有限公司
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is to first apply a DC voltage to the XLPE cable, and use the partial discharge under the condition of the formed damped oscillatory wave to diagnose and locate; while the DC withstand voltage test of the XLPE cable is likely to cause charge accumulation, which will cause hidden damage to the cable. and is also prone to false PD signals
DC oscillating wave boost has a short holding time, small stored energy, and cannot fully excite partial discharge

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
  • Cable series-resonant voltage device with defect location function
  • Cable series-resonant voltage device with defect location function
  • Cable series-resonant voltage device with defect location function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] A cable series harmonic withstand voltage device with the function of defect location, comprising a variable frequency power supply host, an excitation transformer connected to the variable frequency power supply host, a resonant re...

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 cable series-resonant voltage device with a defect location function, including the following steps: (1) equipment wiring; (2) test of the insulation resistance of a cable;(3) cable calibration; (4) withstand voltage test; (5) oscillation wave test; (6) measurement of partial discharge through a system; and (7) analysis of partial discharge data through software. The device adopts an AC high voltage source. A peak synchronization signal is added to the AC variable-frequency series-resonant voltage device to make the series-resonant circuit stop power output at the peak and to close a high-voltage electronic switch at the same time, so that oscillation wave damping oscillation is formed, and cable partial discharge test can be carried out. AC resonant voltage test and oscillation wave partial discharge test can be completed by using one set of device. The device is dual-purpose. The field working efficiency is greatly improved. A partial discharge source canbe accurately located.

Description

technical field [0001] The invention relates to the technical field of cable series harmonics, in particular to a cable series harmonic voltage withstand device with a defect location function. Background technique [0002] With the continuous improvement of power supply reliability requirements, power grid operators are faced with huge challenges. Power cables are widely used in urban power grids due to their advantages of safety, reliability, low climate impact, concealment and durability. With the increase of running time and the ever-increasing load, cable failures become more frequent, and the diagnosis of insulation status becomes particularly important. At present, the management of power cable maintenance is mainly based on the items and test cycles stipulated in the "Power Equipment Handover and Preventive Test Regulations", and regularly conduct insulation performance tests under power failure conditions. Among them, the frequency conversion series resonance test ...

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): G01R31/11G01R31/12
CPCG01R31/083G01R31/11G01R31/1272
Inventor 赵洪义沈道义胡勇
Owner 上海格鲁布科技有限公司
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