Device and method for detecting ground wire of distribution line based on three-phase symmetrical voltage injection

A distribution line, symmetrical detection technology, applied in the direction of measurement device, measurement of electricity, measurement of electric variables, etc., can solve the problems of temporary grounding line detection that is not suitable for distribution lines, and differences in detection principles of distribution lines, to ensure safety, The effect of preventing power transmission and reducing possibility

Active Publication Date: 2018-07-27
GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity of distribution lines and the differences in detection principles, these systems and equipment are not suitable for temporary grounding detection of distribution lines

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
  • Device and method for detecting ground wire of distribution line based on three-phase symmetrical voltage injection
  • Device and method for detecting ground wire of distribution line based on three-phase symmetrical voltage injection
  • Device and method for detecting ground wire of distribution line based on three-phase symmetrical voltage injection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] like figure 1 As shown, an embodiment of the present invention is shown, a distribution line ground wire detection device based on three-phase symmetrical voltage injection, including a detection voltage output module 100 , a current sampling module 200 and a control module 300 .

[0027] The detection voltage output module 100 is bidirectionally connected with the control module 300 and is used to output a three-phase symmetrical detection voltage with stable amplitude and adjustable frequency. The detection voltage output module 100 is also used to connect with the distribution line to be tested, and inject the three-phase symmetrical detection voltage into the distribution line to be tested.

[0028] The current sampling module 200 is used to connect with the distribution line to be tested, and detect the current current of any phase in the distribution line to be tested.

[0029] The control module 300 judges whether there is a ground wire in the power distribution...

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 detection device and method for a distribution line ground wire based on three-phase symmetrical voltage injection. The three-phase symmetrical detection voltage with stable amplitude is injected into the distribution line to be tested, and the current current of any phase in the distribution line to be tested is detected. According to the three-phase symmetrical detection voltage and current current, it is judged whether the distribution line to be tested is There is a ground wire. The distribution line ground wire detection device and method based on three-phase symmetrical voltage injection proposed by the present invention can effectively judge whether there is a temporary ground wire on the distribution line to be tested, prevent power transmission with a ground wire or a ground knife switch, and reduce temporary grounding Possibility of line missed detection ensures the safety of electric workers.

Description

technical field [0001] The invention relates to the field of power grid fault detection, in particular to a detection device and method for a distribution line grounding wire. Background technique [0002] Temporary ground connection of distribution lines is an important part of distribution network operation. During the maintenance and transformation of distribution lines, temporary ground wires must be connected to ensure the safety of maintenance equipment and staff. After the overhaul and reconstruction process is completed, the temporary grounding wire and related devices must be removed before the substation can be switched on for power transmission. If the grounding wire is still not completely removed before the power is switched on, the accident of "power transmission with grounding wire closed" will occur, that is, a three-phase short circuit. After the three-phase short circuit occurs, the current in the line will increase suddenly, which will not only damage the...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 关飞刘明路军余涛程乐峰瞿凯平殷林飞陈艺璇黄骏翅郑宝敏徐茂鑫
Owner GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
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