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

Single-ended fault ranging method based on single-ended traveling wave method and inherent frequency method

A technology of natural frequency and fault location. It can be used in fault location, fault detection according to conductor type, and electrical measurement. It can solve the problem of difficult identification of transient traveling wave heads.

Inactive Publication Date: 2019-01-01
CHONGQING UNIV OF POSTS & TELECOMM
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single-ended fault location method based on single-ended traveling-wave method and natural frequency method is proposed to solve the problem of difficult identification of transient traveling-wave head in single-ended traveling-wave ranging

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
  • Single-ended fault ranging method based on single-ended traveling wave method and inherent frequency method
  • Single-ended fault ranging method based on single-ended traveling wave method and inherent frequency method
  • Single-ended fault ranging method based on single-ended traveling wave method and inherent frequency method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0063] The technical scheme that the present invention solves the problems of the technologies described above is:

[0064] 1 traveling wave ranging

[0065] 1.1 Distance measurement by single-ended traveling wave method

[0066] The principle of single-ended traveling wave distance measurement is to use the time difference between the arrival of the initial traveling wave head at the measurement end and the time difference between the arrival of the reflected wave at the fault point and the measurement end. [9] , the ranging formula is as follows:

[0067]

[0068] In the formula, d is the fault distance, t 1 is the time when the initial traveling wave arrives at the measurement end, t 2 is the ti...

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 claims protection of a single-ended fault ranging method based on a single-ended traveling wave method and an inherent frequency method. According to the method, inherent-frequency-method-based ranging is carried out and a multiple signal classification (MUSIC) algorithm is introduced to obtain an inherent frequency principal component, so that an initial value of a fault point is obtained; wavelet-transform-based single-ended traveling wave ranging is carried out and no fault point reflected wave, adjacent-line reflected wave and opposite-end bus reflected wave need to be distinguished; times of modulus maximum occurrence are recorded in sequence to obtain a plurality of ranging results; and then screening is carried out based on the initial value to obtain a final result. The MATLAB simulation calculation shows that the method is not affected by the fault distance, transition resistance, fault type and wiring mode and has high ranging accuracy and robustness.

Description

technical field [0001] The invention belongs to the field of transmission line fault processing, in particular to a single-end fault ranging method. Background technique [0002] Accurate fault location is the decisive factor for the stable operation of transmission lines. When a fault occurs, the transmission line protection system should analyze and respond, isolate the faulty line, and maintain the stability of the system. Fault location is to find the location of the fault point after the fault occurs, remove the fault, and resume operation. Fault location technology has developed greatly in the past few decades. According to the working principle, it is mainly divided into fault analysis method, traveling wave method, natural frequency method and intelligent algorithm. Currently, the traveling wave method is mainly put into operation. [1] . [0003] The traveling wave method is divided into single-ended method and double-ended method. Compared with the double-ended m...

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
CPCG01R31/085G01R31/088
Inventor 管春龙江航娄哲理贺仁茜王俊杰
Owner CHONGQING UNIV OF POSTS & TELECOMM
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