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Method and device for judging the movement state of sprayed layer particles of gas-insulated transmission lines

A transmission line, gas insulation technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem of inability to judge the movement state of gas line insulation and transmission line particles, achieve simple and convenient judgment methods, and prevent insulation breakdown accidents Effect

Active Publication Date: 2020-09-11
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a method for judging the movement state of sprayed layer particles of gas-insulated transmission lines, aiming to solve the problem that the existing methods cannot judge the movement state of particles in gas-insulated transmission lines with sprayed layers

Method used

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  • Method and device for judging the movement state of sprayed layer particles of gas-insulated transmission lines
  • Method and device for judging the movement state of sprayed layer particles of gas-insulated transmission lines
  • Method and device for judging the movement state of sprayed layer particles of gas-insulated transmission lines

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Embodiment Construction

[0039] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0040] Examples of suppression methods:

[0041] see figure 1 , which is a schematic flowchart of a method for suppressing particle movement in a gas-insula...

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Abstract

The invention provides a method and a device for judging motion states of particles in a sprayed coating of a gas insulated transmission line. The method comprises the steps of: judging whether an electron avalanche increases according to the intensity of an electric field between the sprayed coating and the particles; calculating charge number at the head of the electron avalanche when electron avalanche begins to increase, and judging whether partial discharge occurs between the particles and the sprayed coating according to the value of the charge number; and judging whether the particles move according to an electric field force between the particles and the sprayed coating when partial discharge occurs between the particles and the sprayed coating. Through judging relevant parameters of the particles and the sprayed coating of the gas insulated transmission line, the particles in the sprayed coating of the gas insulated transmission line meet a motion condition only when three parameters meet corresponding conditions, the motion states of the particles in the sprayed coating of the gas insulated transmission line can be learnt timely, and whether the sprayed coating of the gas insulated transmission line meet the requirements can be detected, thereby preventing the occurrence of an internal insulation breakdown accident of the gas-insulated transmission line.

Description

technical field [0001] The invention relates to the technical field of power system transmission lines, in particular to a method and a device for judging the movement state of sprayed layer particles of gas-insulated transmission lines. Background technique [0002] Because the gas-insulated transmission line (GIL) has the advantages of large transmission capacity, high safety and reliability, long service life, and small footprint, at present, it is difficult to construct overhead lines and land acquisition is difficult in special environments such as It has been widely used and has become the development trend of large-scale and high-voltage power transmission in the future. However, during the production, transportation, installation and operation of GIL, some conductive particles are inevitably mixed in. Under the action of electric field force in GIL, the particles will move, which will cause distortion of the local field strength in GIL, and may even cause Insulation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R31/12
CPCG01R31/00G01R31/1272
Inventor 颜湘莲徐晓东李志兵律方成刘宏宇田阳刘北阳詹振宇董蒙
Owner CHINA ELECTRIC POWER RES INST
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