Method for entering 400kV direct-current electric transmission line tangent tower equipotential

A technology of direct current transmission lines and straight towers, applied in the direction of overhead lines/cable equipment, etc., can solve problems such as electric shock injuries, achieve high safety, and improve the effect of safe and stable operation

Inactive Publication Date: 2014-01-15
STATE GRID CORP OF CHINA +3
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the project where the operator enters the equipotential of the wire from the grou

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 entering 400kV direct-current electric transmission line tangent tower equipotential
  • Method for entering 400kV direct-current electric transmission line tangent tower equipotential
  • Method for entering 400kV direct-current electric transmission line tangent tower equipotential

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The inventive method of this example is used for ±400kV direct current transmission line straight towers in areas with an altitude of 3000m~5300m; figure 1 As shown, the linear tower 1 includes a cross arm and a tower body; the cross arm is connected to the conductor 4 through the insulator 2 provided on itself, and a voltage equalizing ring 3 is provided near the insulator 4 of the conductor.

[0029] Such as figure 2 As shown, live workers 5 wear a full set of shielding clothing and enter the construction site, and climb the tower 1 after wearing work equipment. Before climbing the tower, the operator checks whether the safety protection equipment and working tools are damaged, and replaces them if damaged.

[0030] The live operator 5 ascends the tower 1 to reach the position where the tower body is parallel to the wire. During the process of climbing the tower 1, the operator 5 is at the ground potential, and the distance between the operator 5 and the charged bod...

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 method for entering +/-400kV direct-current electric transmission line tangent tower equipotential in regions of which the altitudes range from 3000m to 5300m. The method includes the steps that in the hot-line work process in the regions of which the altitude range from 3000m to 5300m, operating personnel climbs to a tower from the ground and arrives at the position, on the same horizon with a wire, of the tower body, and the distance between the operating personnel and an electrified body needs to be kept between 2.7m and 3.7m. In the process that the operating personnel enter a high electric field, the total of the distance between a grounding body and the operating personnel and the distance between operating personnel and the electrified body needs to be kept between 3.5m and 4.5m. When the operating personnel arrive at the electrified body, the distance between the operating personnel and the grounding body needs to be kept between 3.5m and 4.5m. Due to the adoption of the method, the operating personnel will not be electrified no matter the operating personnel are in low potential, intermediate potential or equipotential, and the hot-line work can be safely and smoothly finished.

Description

Technical field: [0001] The invention relates to the technical field of live working, and more specifically relates to a method for entering equipotentiality of a straight tower of a ±400kV DC transmission line in an area with an altitude of 3000m to 5300m. Background technique: [0002] The Qinghai-Tibet DC interconnection project starts from Qinghai Golmud Converter Station (2880m above sea level) in the east and ends at Lhasa Converter Station in Tibet (3850m above sea level) in the west. . The straight pole tower is a horizontal V-shaped insulator string structure with 4 split conductors. For this special case, its voltage level is determined as ±400kV. [0003] Live work is a necessary means to ensure the safe and stable operation of transmission lines. Therefore, after the Qinghai-Tibet DC transmission project is put into operation, it is also necessary to carry out live work, that is, the operators enter the equipotential to carry out maintenance on the line equipme...

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): H02G1/02
Inventor 丁玉剑郅啸周军李军李庆峰刘荣廖蔚明吴童生白伟马乐闫建欣王炳强谢庆孙辉姜德喜刘玉胜路林刘蔚宁
Owner STATE GRID CORP OF CHINA
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