Fault location method for wide area traveling wave signal below power grid

A fault location, power grid technology, applied in fault location, electrical components, electrical digital data processing, etc., can solve problems such as limitation, algorithm effect does not meet ideal requirements, and algorithm fault tolerance is not considered.

Active Publication Date: 2015-02-04
CHINA UNIV OF MINING & TECH
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the research on the distance measurement of traveling wave method under the wide area system, the algorithm is mainly aimed at the radial distribution network. If the system contains special structures such as ring network, the algorithm effect may not meet the ideal requirements; the adjacent point optimization strategy is adopted Find the shortest path, and then get the fault location through linear regression analysis; literature [5] In the case of expanding the concept of double-ended distance measurement, calculate the time to reach all monitoring points when each busbar fails. When the actual fault occurs, the minimum time to reach the detection d

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
  • Fault location method for wide area traveling wave signal below power grid
  • Fault location method for wide area traveling wave signal below power grid
  • Fault location method for wide area traveling wave signal below power grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] 1. A method for fault location of wide-area traveling wave signals under a general power grid, comprising the steps of:

[0033] 1) Select the optimal TWR configuration scheme in the power grid with a determined topology to obtain prior knowledge; the prior knowledge includes the shortest distance between all busbar nodes in the power grid, the busbar position corresponding to the configured TWR, and the busbar where TWR is installed One or more adjacent busbars at and the shortest distance between the one or more adjacent busbars reaching each TWR respectively, the line mode traveling wave propagation speed c a ; Store the prior knowledge into the database SQL-0;

[0034] 2) Assuming that K TWRs are configured in the power grid, when a fault occurs in the power grid, K TWRs detect the fault traveling wave voltage at the same time, and the time T for the fault ...

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 fault location method for wide area traveling wave signal below power grid, with a little of fault traveling wave monitoring points for the power grid, the fault signal is processed on the phase-mode transformation and the small wave mode maximum value process to obtain the initial wave header information; the extension double-end travelling wave fault location is realized in the complex power grid, the fault location method of general power grid is offered on this basis for fast finding the exact double-end ranging combination from the measured data, and raising the ranging precision by amending the result. The monitoring data is processed and checked for realizing extension double-end travelling wave fault location for any fault point of the system, and the method has good fault-tolerant capability.

Description

technical field [0001] The invention relates to research on a fault location method adapted to wide-area traveling wave signals under a general power grid. Background technique [0002] With the continuous expansion of the spatial scope of modern power systems and the development of modern computer processing technology, digital signal processing technology, and GPS synchronous timing technology, wide-area information collection after complex power grid faults is becoming easier to achieve. The research on relay protection and status monitoring under the wide-area system is gradually increasing; in order to reduce the loss of fault accidents and achieve good economic and social benefits, it is necessary to monitor the safety status of the power grid and quickly locate faults, especially for Wide-area systems, there have been some mature research results at home and abroad. Because the traveling wave method is less affected by the change of system operating parameters, and c...

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): G01R31/08G06F17/30
CPCH02H7/265
Inventor 梁睿王飞李晓娜陈宇航田野薛雪
Owner CHINA UNIV OF MINING & 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