Flashover voltage prediction method for high speed train roof insulator

A technology for roof insulation and pollution flashover voltage, applied in the direction of testing dielectric strength, etc., can solve the problems of uneven surface distribution of insulator sheds, complex shapes, and different diameters of insulator sheds

Active Publication Date: 2014-05-21
CRRC QINGDAO SIFANG CO LTD
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual working conditions, the pollution is not uniformly distributed along the surface of the insulator shed, and the diameter of the insulator shed is different and the shape is complex
[0004] The traditional insulator pollution flashover voltage prediction method has the following defects: (1) The traditional measurement method is only applicable to the case where the pollution is uniforml...

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
  • Flashover voltage prediction method for high speed train roof insulator
  • Flashover voltage prediction method for high speed train roof insulator
  • Flashover voltage prediction method for high speed train roof insulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0029] A method for predicting the pollution flashover voltage of high-speed train roof insulators described in the present invention, in order to ensure that the prediction results are more accurate and closer to the actual working conditions on site, the unevenness of pollution along the surface of the insulator shed and the inhomogeneity of the insulator shed Considering the complexity of the skirt shape, the shape function and the pollution distribution function are fitted according to the specific structure of the insulator and the actual pollution distribution, and are brought into the relevant formula together with the pollution resistivity of the insulator for processing, and finally the critical value of the train roof insulator is obtained. flashover voltage.

[0030] In order to obtain the relationship formulas among shape function, p...

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 flashover voltage prediction method for a high speed train roof insulator. The flashover voltage prediction method for the high speed train roof insulator comprises measuring a flashover resistivity rho of the high speed train roof insulator; fitting a shape function g(x) and a pollution distribution function f(x) according to the structure and the actual pollution distribution of the insulator, wherein x is arc length; calculating a critical flashover arc length xc of the insulator according to the flashover resistivity rho, the shape function g(x) and the pollution distribution function f(x) of the insulator and further calculating a critical flashover voltage Uc. According to the flashover voltage prediction method for the high speed train roof insulator, flashover voltages of roof insulators of any shape can be calculated, and meanwhile, influences of nonuniformity of pollution distribution on the flashover voltages of the roof insulators are fully taken advantages of; compared with the prior art, the flashover voltage prediction method for the high speed train roof insulator is more approximate to actual working conditions on site and is more accurate in prediction results.

Description

technical field [0001] The invention relates to a method for predicting pollution flashover voltage of roof insulators of high-speed trains, belonging to the technical field of railway system measurement. Background technique [0002] Train roof insulators, including conductive rod support insulators and pantograph support insulators, are one of the main insulation equipment for trains, and their reliability is directly related to the safe and stable operation of electrified railways. With the rapid development of high-speed railways in my country, the operating mileage and crossing area of ​​high-speed railways have gradually increased, and the operating environment along the lines has become more complex, and the requirements for EMU roof insulators have become more stringent. In recent years, flashover faults of EMU roof insulators have become increasingly frequent, and have become an important factor affecting the safe and stable operation of high-speed railways in my co...

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): G01R31/12
Inventor 梁建英徐跃余进姚非刘先恺
Owner CRRC QINGDAO SIFANG CO LTD
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