Novel power transmission line lightning stroke point locating method based on OPGW (optical fiber composite overhead ground wire) light polarization state

A transmission line and optical polarization technology, applied in the direction of the fault location, can solve the problems of inability to accurately identify the high-frequency transient traveling wave of the fault point, positioning failure, and large positioning error

Active Publication Date: 2015-05-27
WUHAN UNIV
View PDF9 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the traveling wave method has higher positioning accuracy than the fault analysis method, it is currently widely used in the distance measurement of transmission lines. However, the field operation experience shows that some

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
  • Novel power transmission line lightning stroke point locating method based on OPGW (optical fiber composite overhead ground wire) light polarization state
  • Novel power transmission line lightning stroke point locating method based on OPGW (optical fiber composite overhead ground wire) light polarization state
  • Novel power transmission line lightning stroke point locating method based on OPGW (optical fiber composite overhead ground wire) light polarization state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Below in conjunction with the accompanying drawings, the technical solution of the present invention is further specifically described, a new method for positioning the lightning strike point of a power transmission line based on the OPGW optical polarization state, comprising the following steps:

[0031] Step 1. Collect the optical polarization signal on the spot, and use the generalized morphological filter composed of semicircular structural elements of different lengths to filter and preprocess the sampled signal; since the actual sampled signal usually contains different types and different scales of noise, Therefore, the short-scale structural elements can better filter out the high-frequency components in the noise and have the effect of smoothing the waveform, while the long-scale structural elements have an obvious low-pass effect, and the filtering time is correspondingly longer. Regarding the selection of the scale of structural elements, there is no definite...

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 power transmission line lightning stroke point fault locating method, in particular to a novel power transmission line lightning stroke point locating method based on the OPGW (optical fiber composite overhead ground wire) light polarization state. According to the method, fault points are located accurately by extracting the moment at which polarization state mutation information of transmission light in OPGWs at lightning stroke points is transmitted to polarization demodulation equipment with an iteration SVD (singular value decomposition) algorithm in combination with a generalized mathematical morphology method, a wavelet analysis method and the like through lightning stroke OPGW tests. According to the method, the Faraday effect is applied to power transmission line fault location, the effect that the location accuracy is interfered by factors such as transition resistance, line parameters, system running modes, traveling wave transmission dispersion, traveling wave speeds and the like in traditional fault location methods is avoided, and the location accuracy is very high. All that is required is to perform monitoring at two ends of a line during location, so that the input cost is reduced.

Description

technical field [0001] The invention relates to a fault location method for a lightning strike point of a transmission line, in particular to a new method for locating a lightning strike point of a transmission line based on an OPGW optical polarization state. Background technique [0002] With the construction of smart grid, the integration of power transmission network and communication network has become the main development trend. Optical Fiber Composite Overhead Ground Wire (OPGW) is widely used in power systems because of the addition of optical units on the basis of ordinary ground wires, which has the functions of lightning protection and power system communication. In practice, when the OPGW is struck by lightning, damage, broken strands, and even fiber damage often occur, seriously affecting the operation of the power grid and real-time data transmission. [0003] At present, the existing transmission line fault location methods are divided into principles, mainly...

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): G01R31/08
Inventor 龚庆武冯瑞发李伟徐高
Owner WUHAN UNIV
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