Method for improving fault location accuracy of extra-high-voltage DC transmission line

A DC transmission line and fault location technology, applied in the direction of the fault location, etc., can solve the problems of complex traveling wave waveform, inability to determine the fault location, obstacles, etc., and achieve the effect of reducing processing time and reducing the time for inspection and inspection

Active Publication Date: 2015-12-30
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current common fault location identification method relies on traveling wave distance measurement on overhead lines. It becomes relatively complicated, causing the background of the ranging device to calculate multiple possible fault locations, resulting in the failure of ranging; sometimes the same line is installed with fault ranging devices developed by different manufacturers, which will give different fault locations, resulting in failure Determine the real fault location; some line sections do not even install fault distance measuring devices at all; these factors have caused great obstacles to the line operating unit to quickly determine the fault location and organize line maintenance personnel to quickly deal with line faults

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 improving fault location accuracy of extra-high-voltage DC transmission line
  • Method for improving fault location accuracy of extra-high-voltage DC transmission line
  • Method for improving fault location accuracy of extra-high-voltage DC transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] like Figures 1 to 4 As shown, a method to improve the accuracy of fault location of EHVDC transmission lines includes:

[0028] Step A. After the fault triggers the tripping of the line, use traveling wave ranging to obtain the position of each suspected fault point or the entire tripping line;

[0029] Step B. When the line trip does not belong to the joint trip, query the various external disasters that occurred near each of the suspected fault points or the location of the entire trip line, and calculate the line caused by the influence of the various external disasters. The degree of membership of the trip;

[0030] Step C, querying each defect of the line, and calculating the probability of tripping caused by the line under the influence of each defect of itself;

[0031] In step D, the most probable fault location is obtained by synthesizing the above membership degrees and probabilities.

[0032] Using the above technical solution, when a line fault occurs, i...

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 provides a method for improving the fault location accuracy of an extra-high-voltage DC transmission line. According to the method, in case of a line fault, line defect information, a meteorological system and other real-time information are inquired according to position information of the fault to determine the real fault position and actual reasons which cause the line fault, so that solution suggestions can be put forward, the fault handling time is greatly shortened for staff, and economic loss caused by the fault is reduced.

Description

technical field [0001] The invention relates to the field of high-voltage power transmission in electric power systems, in particular to a method for improving the accuracy of fault location of ultra-high voltage direct current transmission lines. Background technique [0002] my country's economy continues to develop, and the requirements for power supply are getting higher and higher, so the power industry is also constantly developing in response to social requirements. In order to ensure sufficient power supply in coastal areas with dense power loads, China Southern Power Grid has formed 15 west-to-east power transmission channels of "seven direct currents and eight alternating currents" of 500 kV and above, all of which are more than 1,000 kilometers long. Longer, so the probability of failure on the line corridor is higher. These long transmission lines shoulder the important task of connecting the resource-rich areas in the west and the power load center in the east....

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 Applications(China)
IPC IPC(8): G01R31/08
Inventor 李晋伟张怿宁宋云海钱海陈岳王奇黄义隆王振何珏甘振宁陈浩宁孙萌常安陈彦州
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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