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

Conductor galloping resistant method of iron towers of overhead power transmission lines

An overhead transmission line, wire galloping technology, applied in the installation of cables, electrical components, cable installation devices, etc., can solve the problem that the safety of the tower is rarely mentioned, the impact of ice-coated wires is rarely studied, and the interaction between adjacent gear wires is not considered. Coupling, mutual influence and other issues to achieve the effect of rapid modeling

Active Publication Date: 2010-09-29
CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING GROUP CORP
View PDF4 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Previous research on galloping focused on the conductor gallop itself, and approximated the iron tower as a spring-supported boundary. This research method has the following disadvantages: (1) The coupling effect between the iron tower and the conductor is not considered; (2) The

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
  • Conductor galloping resistant method of iron towers of overhead power transmission lines
  • Conductor galloping resistant method of iron towers of overhead power transmission lines
  • Conductor galloping resistant method of iron towers of overhead power transmission lines

Examples

Experimental program
Comparison scheme
Effect test

Example

[0121] Comparative example: Shuibuya-Qianjiang I and II return 500kV power transmission line galloping calculation

[0122] Shuibuya-Qianjiang I and II return 500kV power transmission line project, the line runs east-west, and it is a double-circuit compact line in the Jingzhou area of ​​Hubei (design tower number: 302#~851#), and the conductor adopts 6-split LGJ-300 / 40 conductors, located in the plains. Affected by strong winds, snowfall and bad weather, galloping occurred on the double-circuit compact line from January 11 to 13, 2008. Line inspection personnel took a video of the galloping on the spot, and measured the galloping amplitude and galloping frequency.

[0123] Calculation model: two tension sections of seven-tower six-gear line, 400-meter span, 6-split LGJ-300 / 40 conductor, 8m / s wind speed, 30° initial angle of attack.

[0124] Calculation results:

[0125] A. The calculated average galloping amplitude of the wire is 5.4 meters, which is relatively consistent ...

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 conductor galloping resistant method of the iron towers of overhead power transmission lines. The method comprises the following steps: building a iron tower model, setting conductor galloping parameters, building a coupling system model of iron towers and conductors, adding iron tower nodal loads, setting tower foot nodal constraints, defining a load curve; setting time parameters, using a core computing module for computing and solving; using a post-processing module to directly display the galloping animation of conductors and iron towers, and directly computing and outputting an internal force-time history curve of iron tower units; and checking the bearing capacity of iron tower units according to the computed and output internal force-time history curve ofiron tower units, and judging whether iron tower units are needed to reinforce. The conductor galloping resistant method considers the coupling effect of iron towers and conductors, has higher accuracy in the research of the conductor galloping rule, and can be used to compute and analyze the influence of conductor galloping on iron towers, research the galloping-resistant bearing capacity of iron towers and provide the basis of iron towers reinforcement, thus meeting the needs of scientific researches and engineering designs.

Description

technical field [0001] The invention relates to a method for resisting conductor galloping of an iron tower of an overhead power transmission line. Background technique [0002] Conductor galloping is the nonlinear vibration of fluid-solid coupling generated by ice-coated conductors under the excitation of relatively stable wind. [0003] The ice-coated wire has a large galloping range, a long duration, and great harm. In the lightest case, phase-to-phase flashover, damage to conductors and fittings, in severe cases, it may lead to accidents such as line tripping, power outage, disconnection and tower collapse, resulting in major economic losses. In the southern ice disaster in 2008, many transmission line towers were damaged due to wire dancing. Wire galloping is accidental in time and space and is difficult to observe. my country is a country with frequent galloping, and conductor galloping has become one of the important factors threatening the safe and stable operatio...

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): H02G7/14H02G1/00
Inventor 曾德森陈一军杨艺冯衡吴海洋田三明
Owner CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING 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