Intelligent non-partial discharge extra-high voltage sine-wave modulation pressure-resistant apparatus

A technology of sine wave modulation and pressure-resistant devices, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, etc., can solve problems such as unsuitable for partial discharge tests, unsuitable for on-site tests, difficult maintenance, etc., to achieve automatic frequency and voltage regulation, The effect of eliminating mutual interference and improving safety

Inactive Publication Date: 2009-07-08
湖南省电力公司超高压管理局 +1
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device is heavy and difficult to maintain, it is only suitable for use in the test hall, not suitable for field tests
[0004] In the 1980s, most of the domestic test power sources used frequency conversion of intermediate frequency gen

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
  • Intelligent non-partial discharge extra-high voltage sine-wave modulation pressure-resistant apparatus
  • Intelligent non-partial discharge extra-high voltage sine-wave modulation pressure-resistant apparatus
  • Intelligent non-partial discharge extra-high voltage sine-wave modulation pressure-resistant apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] When the capacitive load and the inductive load in the circuit are connected in series, if the frequency of the input AC is changed to make the capacitive reactance equal to the inductive reactance, the loop will resonate, and the voltage at both ends of the load will increase several times to dozens of times. This principle is used to realize the withstand voltage and partial discharge test of UHV. Such as figure 1 , figure 2 with image 3 As shown, the intelligent non-partial discharge UHV sine wave modulation withstand voltage device of the present invention includes a variable frequency power supply unit 1, an intermediate excitation step-up transformer 2 and a series resonant circuit 3 connected in series in sequence. After phase current rectification and inversion, a single-phase frequency-adjustable AC output (voltag...

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

Te invention relates to an intelligent type partial discharge-free ultrahigh voltage sine wave modulation voltage resistance device. The device comprises a frequency conversion power unit, a middle excitation boosting transformer and a serial resonant circuit which are sequentially connected in series; the frequency conversion power unit commutates and inverts 380V triphase current, obtains and outputs single-phase frequency-adjustable alternating current, and the 380V triphase current is boosted to 1kV around by the middle excitation boosting transformer; the output of the middle excitation boosting transformer is connected with the serial resonant circuit; the serial resonant circuit comprises a resonant reactor L1 and a voltage divider; a capacitor Cx of a tested article and the voltage divider are in parallel connection; a secondary end of the voltage divider is connected with a high voltage measuring meter and a protection device respectively; and the high voltage measuring meter and the protection device are connected with feedback ends of the frequency conversion power unit. The device is the intelligent type partial discharge-free ultrahigh voltage sine wave modulation voltage resistance device which has a simple and compact structure, simple operation and wide application range, can meet requirements of voltage resistance and partial discharge test of ultrahigh voltage electric equipment.

Description

technical field [0001] The invention mainly relates to the field of high-voltage test devices, in particular to an intelligent non-partial discharge UHV sine wave modulation withstand voltage device. Background technique [0002] At present, only Russia and Japan have built 1000KV UHV AC power transmission projects in the world, but there are still few test devices for on-site equipment withstand voltage. In my country, the first 1,000 kV Jindongnan-Nanyang-Jingmen UHV AC test and demonstration project transmission line project in Asia started foundation construction on June 28, 2007; the iron tower assembly construction was completed at the end of April 2008, and completed in mid-August The construction task of ground wire and OPGW optical cable tension erection and accessories installation project. [0003] In foreign countries, the partial discharge test power supply equipment used for transformers is separated from the AC withstand voltage test power supply equipment. T...

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): G01R35/00
Inventor 雷文辉张寒王志仁王江
Owner 湖南省电力公司超高压管理局
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