CN-122017487-A - Device and method for observing movement of metal particles in vertical shaft GIL

CN122017487ACN 122017487 ACN122017487 ACN 122017487ACN-122017487-A

Abstract

The invention discloses a device and a method for observing movement of metal particles in a vertical shaft GIL, relates to the technical field of high-voltage transmission lines, and solves the problems that an existing observing device is limited in observing visual angle and poor in simulation reality when simulating a direct-current GIL vertical shaft environment, and cannot capture movement of particles; the invention relates to a high-voltage power equipment insulation structure, which comprises a cylindrical shell, an insulator, a transparent cover plate, a cylindrical guide rod, a metal particle placement table and a vertical shaft placement table, wherein a half-side cylinder wall structure is reserved on the upper half part of the cylindrical shell along the axial direction to form an open observation area, the metal particle placement table is of an arc-shaped strip structure matched with the curvature of the inner wall of the shell and welded at the center of the upper half side of the shell, the transparent cover plate is assembled on the top of the shell, and the cylindrical guide rod is arranged in a through hole of the cover plate and the insulator in a penetrating way.

Inventors

LI MINGYANG
CHEN MENGTING
HUANG JIAJIE
WANG LIPING
MAO QIANG
ZHANG CHANGHONG
LI WEIGUO
LU CHANGAN
QIU YINAN
YAO JUN
YANG XU
LIU RUONAN
YUAN XIANGXIANG

Assignees

中国南方电网有限责任公司超高压输电公司电力科研院

Dates

Publication Date: 20260512
Application Date: 20260131

Claims (10)

1. The device for observing the movement of the metal particles in the vertical shaft GIL is characterized by comprising an experimental environment module, a vertical shaft model module and a shooting module; the experimental environment module is provided with a closed pressure air cavity and an observation window capable of observing the inside of the pressure air cavity, and is provided with an air charging valve and an air extracting valve; The vertical shaft model module is arranged in the pressure air cavity and comprises a cylindrical shell, a transparent cover plate, an insulator, a cylindrical guide rod and a metal particle placing table, wherein the cylindrical shell is arranged in the pressure air chamber in a manner that the axis of the cylindrical shell is vertical as a conductor, an open observing area is arranged at the upper half part of the cylindrical shell along the axial direction; The shooting module comprises a high-speed camera arranged in front of the observation window and is used for shooting metal particles in the open observation area.
2. The observation device for metal particle movement in the vertical shaft GIL according to claim 1, wherein the top of the cylindrical shell is provided with an opening, the transparent cover plate covers the opening, the upper part of the cylindrical shell is provided with a partial opening structure along the circumferential direction, a half-side cylinder wall structure along the circumferential direction is reserved, and the transparent cover plate and the half-side cylinder wall structure enclose the open observation area.
3. The observation device for the movement of the metal particles inside the vertical shaft GIL according to claim 1, wherein the insulator and the transparent cover plate are provided with through holes coaxial with the cylindrical shell, and the radius of the through holes is the same as the radius of the cylindrical guide rod.
4. The apparatus for observing the movement of the metal particles in the interior of the vertical shaft GIL according to claim 1, wherein the metal particle placement stage is welded to the inner wall of the cylindrical housing and is located at the opposite side of the open observation area.
5. The observation device for metal particle movement in shaft GIL according to claim 1, wherein the bottom of the cylindrical shell is provided with a ground round hole for connecting with a ground wire, and the top of the cylindrical guide rod is provided with a wiring hole for connecting with a high-voltage wire.
6. The device for observing the movement of the metal particles inside the vertical shaft GIL according to claim 1, wherein the bottom of the cylindrical housing is provided with a vertical shaft placing table for maintaining insulation between the cylindrical guide rod and the bottom surface of the pressure air chamber.
7. The observation device for metal particle motion in shaft GIL according to claim 1, wherein the cylindrical shell and the metal particle placing table are made of aluminum alloy, and the length of the metal particle placing table is 1/6-1/3 of the circumference of the cylindrical shell.
8. A method for observing the movement of metal particles in a shaft GIL, characterized in that the device for observing the movement of metal particles in a shaft GIL according to any one of claims 1 to 7 is used, comprising the steps of: s1, opening the pressure air cavity, vertically placing the assembled vertical shaft model module into the pressure air cavity, connecting a grounding wire through the grounding round hole, and connecting a high-voltage wire through the wiring hole; s2, uniformly placing metal particles to be observed on the metal particle placing table, rotating the metal particle placing table to the opposite side of the observation window, and closing the pressure air cavity; S3, vacuumizing the pressure air cavity through the air extraction valve, and then filling insulating gas with set pressure through the air charging valve; S4, arranging the high-speed camera frame in front of the observation window, wherein the erection height of the high-speed camera is higher than that of the cylindrical shell, so that the high-speed camera is inclined downwards by 45-70 degrees towards the open observation area, and the observation PC and the high-speed camera are started; S5, switching on a direct-current high-voltage power supply and gradually raising the voltage to a set value, and recording by a high-speed camera after the movement of the metal particles is observed; And S6, after the experiment is finished, the direct-current high-voltage power supply is firstly turned off, and after the equipment is discharged, the high-speed camera and the observation PC are turned off, and shooting data are collected for analysis.
9. The method for observing the movement of metal particles inside the vertical shaft GIL according to claim 8, wherein the insulating gas is sulfur hexafluoride.
10. The method for observing the movement of the metal particles in the vertical shaft GIL according to claim 8, wherein the step of applying the high voltage of the direct current adopts a step-up voltage mode, and the voltage is maintained to be stable for recording after the particles start to move.

Description

Device and method for observing movement of metal particles in vertical shaft GIL Technical Field The invention relates to the technical field of high-voltage transmission lines, in particular to a device and a method for observing movement of metal particles in a vertical shaft GIL. Background In the technical field of gas insulated transmission lines (GIL), particularly for GIL arranged in a vertical shaft under direct current voltage, research on the motion behavior of metal particles in the interior of the GIL in a strong electric field is important to ensure insulation safety. Currently, related experimental studies rely primarily on the observation of horizontally disposed GILs, either on the observation device and method, or on a simplified model placed vertically. The prior art generally adopts a cavity structure which is totally enclosed or is only provided with a local observation window, so that the visual field of observation equipment such as a high-speed camera is severely limited, the three-dimensional motion trail of metal particles in a vertical shaft simulation space cannot be comprehensively and continuously captured, obvious observation blind areas exist, and particularly, key behaviors such as collision and adhesion of the particles with the surface of an insulator and the inside of a shell are difficult to clearly record. In addition, the particle bearing platform of the existing device is designed into a planar structure, and is not in accordance with the geometric form of the arc-shaped inner wall of the real vertical shaft GIL, so that the initial attachment state, the charging process, the starting condition and the collision rebound dynamics behavior of the inner wall of the particle bearing platform are greatly deviated from the actual scene of engineering, and the physical reality of experimental data is insufficient. Meanwhile, the devices have limitations in terms of accuracy of simulating a real vertical shaft coaxial electric field structure, stability of an experimental electric field and reliability of high-voltage insulation. In summary, it is difficult to construct an experimental platform for highly reducing the complex structure and field distribution of the vertical shaft GIL and realizing non-blind area and high-definition observation of the whole motion process in the prior art, which restricts the deep research on the motion mechanism of the metal particles in the vertical shaft environment and the development of effective inhibition measures. Disclosure of Invention The invention aims to provide a device and a method for observing the movement of metal particles in a vertical shaft GIL, so that the whole process, no blind area and visual observation of the movement track of the metal particles are realized under the condition of simulating the real insulating gas environment, the geometrical structure and the electric field distribution of the vertical shaft GIL. In order to achieve the aim, the invention adopts the following technical scheme that the metal particle motion observation device in the vertical shaft GIL comprises an experimental environment module, a vertical shaft model module and a shooting module; the experimental environment module is provided with a closed pressure air cavity and an observation window capable of observing the inside of the pressure air cavity, and is provided with an air charging valve and an air extracting valve; The vertical shaft model module is arranged in the pressure air cavity and comprises a cylindrical shell, a transparent cover plate, an insulator, a cylindrical guide rod and a metal particle placing table, wherein the cylindrical shell is arranged in the pressure air chamber in a manner that the axis of the cylindrical shell is vertical as a conductor, an open observing area is arranged at the upper half part of the cylindrical shell along the axial direction; The shooting module comprises a high-speed camera arranged in front of the observation window and is used for shooting metal particles in the open observation area. Further, an opening is formed in the top of the cylindrical shell, the transparent cover plate covers the opening, a partial opening structure is formed in the upper portion of the cylindrical shell along the circumferential direction, a half-side cylinder wall structure in the circumferential direction is reserved, and the transparent cover plate and the half-side cylinder wall structure enclose the open observation area. Further, through holes coaxial with the cylindrical shell are formed in the insulator and the transparent cover plate, and the radius of the through holes is the same as that of the cylindrical guide rod. Further, the metal particle placement stage is welded to the inner wall of the cylindrical housing and is located on the opposite side of the open field of view. Further, a grounding round hole is formed in the bottom of the cylindrical shell and used for being connected with a gr