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Power transmission line vibration monitoring device

A technology for vibration monitoring and power transmission lines, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve difficulties, power sensors are vulnerable to electromagnetic interference, on-site power supply, monitor the entire file of wire distributed monitoring and other problems, to achieve Strong function, avoid electromagnetic interference, high reliability effect

Pending Publication Date: 2019-04-23
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems that the previous on-line monitoring devices for transmission lines cannot simultaneously monitor the degrees of freedom in the vertical, lateral and torsional directions, it is difficult to carry out distributed monitoring of different positions of the entire wire, and the power sensor is susceptible to electromagnetic interference and the on-site power supply is difficult. The invention provides a transmission line vibration monitoring device and system, which realizes comprehensive and ready acquisition of transmission line vibration parameters, ensures line safety, and provides important data support for design and transformation

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0056] A transmission line vibration monitoring device provided by an embodiment of the present invention, its front view is as follows figure 1 As shown, the left view is as figure 2 As shown, it mainly includes: outer sleeve 2, inner sleeve 3, weight 5, end cap 7 and fiber grating sensing unit 1;

[0057] Wherein, the outer sleeve 2 is slidingly connected with the inner sleeve 3; the inner sleeve 3 is sleeved on the wire to be tested;

[0058] The weight 5 is connected below the outer sleeve 2;

[0059] The fiber grating sensing unit 1 is fixedly installed on the outer wall of the inner sleeve 3 .

[0060] The inner sleeve 3 is used to clamp the wire, and is formed by connecting two parts symmetrically with upper and lower bolts;

[0061] The inner sleeve 3 is in soft contact with the wire 18 through a rubber collar 4, and is fixed by bolts to ensure that it will not rotate and slip relative to the wire 18;

[0062] The outer sleeve 2 can rotate around the axis of the w...

Embodiment 2

[0070] The monitoring method for the torsional vibration of the transmission line is as follows:

[0071] The lower end of the outer sleeve 2 is connected to a spherical weight 5. When the wire 18 and the inner sleeve 3 are twisted relative to the ground, the gravity of the weight 5 can ensure that the outer sleeve 2 remains stationary relative to the ground, thus causing the inner and outer sleeves to When the relative rotation of the inner and outer sleeves occurs, the gap between the inner sleeve 3 and the inner wall of the front end of the outer sleeve 2 will change. At this time, the fiber grating sensing unit 1 fixed on the inner sleeve will be affected. The pressure and strain will change, and this change will lead to the change of the central wavelength of the grating reflected wave. The corresponding relationship between the strain of the fiber grating sensing unit 1 and the change of the reflection center wavelength of the fiber grating can determine the rotation ang...

Embodiment 3

[0073] The monitoring methods for horizontal and vertical vibration of conductors are as follows:

[0074] When the wire 18 vibrates in the horizontal and vertical directions, the mass block 11 will exert pressure on the fiber grating sensors 12, 13, 14, 15 due to inertia, causing the strain of the fiber grating sensors 12, 13, 14, 15 to change, This change will lead to the change of the central wavelength of the grating reflected wave, which is transmitted back to the fiber grating demodulator 24 through the optical fiber, and then according to the horizontal and vertical accelerations calibrated in advance before the installation of the whole device and the fiber grating sensors 12, 13, 14, 15 strain and the corresponding relationship between the reflection center wavelength of the fiber grating, the acceleration of the wire 18 in the horizontal and vertical directions can be determined, thereby realizing the monitoring of the horizontal and vertical vibration of the wire.

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Abstract

The invention provides a power transmission line vibration monitoring device, which comprises an outer sleeve (2), an inner sleeve (3), a heavy object (5) and a first optical fiber grating sensing unit (1), wherein the outer sleeve (2) and the inner sleeve (3) are glidingly connected; the inner sleeve (3) is sheathed on a conducting wire to be tested; the heavy object (5) is connected with the lower part of the outer sleeve (2); the first optical fiber grating sensing unit (1) is fixedly arranged at the outer wall of the inner sleeve (3). The technical scheme provided by the invention has theadvantages that an optical fiber grating sensor is used as a main sensing unit; the vibration of the conducting wire in the vertical direction, the transverse direction and the torsion direction is monitored; the reliability is high; the function is strong; the comprehensive accurate obtaining of power transmission line vibration parameters is realized; the line security is guaranteed; important data support is provided for design and modification.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of high-voltage overhead transmission lines, in particular to a vibration monitoring device for transmission lines. Background technique [0002] Galloping, breeze vibration and deicing jump are the forms of vibration that overhead transmission lines often suffer under the action of wind load and ice load. When these vibrations occur, they will be accompanied by vibrations in the horizontal or vertical direction of the wire, and galloping is also accompanied by torsional vibration along the wire axis. At the same time, since the shape of the ice on the wire is irregular in most cases, the center of mass of the ice deviates from the center of the wire, and the torsional vibration of the wire around its axis will inevitably be caused when the ice is removed. At present, the following problems exist in the monitoring of dynamic characteristics of transmission lines: [0003] (1) Since th...

Claims

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Application Information

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IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 姬昆鹏刘彬程永锋杨加伦展雪萍李鹏李丹煜费香泽张立春赵彬
Owner CHINA ELECTRIC POWER RES INST
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