Method for analyzing critical icing type based on numerical simulation model

A model analysis and numerical simulation technology, applied in CAD numerical modeling, design optimization/simulation, electrical digital data processing, etc., can solve problems affecting the safe and stable operation of the power grid, conductor galloping, transmission line disconnection, etc.

Pending Publication Date: 2020-11-20
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The icing of transmission lines seriously affects the safe and stable operation of the power grid. The emergence of extreme weather conditions has caused frequent incidents of large-scale icing of transmission li...

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 analyzing critical icing type based on numerical simulation model
  • Method for analyzing critical icing type based on numerical simulation model
  • Method for analyzing critical icing type based on numerical simulation model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] The present invention will be further described below in conjunction with the accompanying drawings.

[0062] see figure 1 , this embodiment provides a method for analyzing critical icing types based on a numerical simulation model, and the specific steps are as follows:

[0063] Step 1: Establish a two-dimensional wire geometry model and an air flow field model, and solve to obtain the air flow field distribution.

[0064] The two-dimensional wire model refers to the geometric model established with the two-dimensional cylindrical section of the wire as the research object. The air flow field model refers to the air flow field established by using the continuity equation of the air flow field, the RANS equation and the standard k-turbulence model. The wire is in the air flow field.

[0065] In detail, the air flow field distribution is solved by the Fluent discrete phase model, and the solution steps are as follows:

[0066] (1) Taking the two-dimensional cylindrica...

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 discloses a method for analyzing a critical icing type based on a numerical simulation model. The method comprises steps of building a two-dimensional wire geometric model and an air flow field model, and solving to obtain air flow field distribution; a water drop stress balance equation being established, a water drop motion equation being obtained according to the water drop stressbalance equation, a water drop motion track being obtained according to the water drop motion equation and the air flow field distribution, and a wire collision coefficient being obtained according to the water drop motion track; establishing a wire icing heat balance equation, and establishing a wire icing freezing coefficient according to the wire icing heat balance equation; and obtaining critical conditions of the glaze and the rime, combining the conductor collision coefficient and the conductor icing freezing coefficient to obtain a change relationship of the critical environment temperature and the critical liquid water content along with external environment factors under the critical conditions of the glaze and the rime, and judging the icing type according to the change relationship and actual meteorological conditions. The method can be widely applied to power transmission line icing type prediction.

Description

technical field [0001] The invention relates to the field of icing prediction of power transmission lines, in particular to a method for analyzing critical icing types based on a numerical simulation model. Background technique [0002] The icing of transmission lines seriously affects the safe and stable operation of the power grid. The emergence of extreme weather conditions has caused frequent incidents of large-scale icing of transmission lines, resulting in accidents such as disconnection of transmission lines, dancing wires, tower collapses, and insulator flashovers, which have caused serious damage to the power grid department. Huge economic property loss. So far, the numerical simulation research on transmission line icing mainly involves the collision characteristics and freezing characteristics of conductors. There are many numerical solution methods, but different icing types have slightly different corresponding icing growth models. Therefore, the analysis of ici...

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): G06F30/28G06F113/08G06F111/10G06F119/14
CPCG06F30/28G06F2111/10G06F2113/08G06F2119/14
Inventor 阳林念路鹏胡智浩郝艳捧李立浧
Owner SOUTH CHINA UNIV OF TECH
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