Gas-solid discharge along surface test streamer monitoring and surface potential measuring system and method

A technology of creeping discharge and surface potential, used in electrostatic field measurement, measurement device, measurement of electrical variables, etc., can solve the problems of affecting the sealing performance of the tank, the single structure of the measurement sample, and the lack of combined analysis of dynamic and static laws.

Inactive Publication Date: 2017-05-17
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The motion control mechanism and the sealed tank adopt a dynamic contact method, and long-term operation will affect the sealing performance of the tank;
[0005] 2) The structure of the test sample is relatively simple, and only one or two electrode structures can be measured to measure the surface potential, which is not conducive to the large-scale development of experimental research;
[0006] 3) It is difficult to obtain the influence law and mechanism of surface charge on the insulating medium by separately observing the development of surface charge and the distribution of surface charge without combining the dynamic and static laws of surface discharge.

Method used

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  • Gas-solid discharge along surface test streamer monitoring and surface potential measuring system and method
  • Gas-solid discharge along surface test streamer monitoring and surface potential measuring system and method
  • Gas-solid discharge along surface test streamer monitoring and surface potential measuring system and method

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Effect test

Embodiment 1

[0047] As shown in the figure, the gas-solid surface discharge test streamer monitoring and surface potential measurement system provided in this embodiment can realize the combined analysis of dynamic and static laws of surface discharge, including the following components:

[0048] The dark room is used to provide a good working environment for the photomultiplier tube, and avoid the influence of other light sources in the environment on the test results; the dark room uses double-layer high-quality high-density shading cloth to build the entire laboratory, and the shading rate of the dark room can reach 99%; the entire experimental environment can be kept in a dark room, avoiding the influence of other light sources in the environment;

[0049]The motion control system is used to realize the measurement of the potential of the lower surface of various electrode structures (flat plate electrode, column plate electrode, finger-type electrode, circular frustum electrode, etc.) ...

Embodiment 2

[0053] This embodiment combines Figure 2-6 In the plate electrode structure shown, in the figure, the metal electrodes 21 on the left and the upper side are HV metal electrodes; the insulating column 22 in the middle can be in the shape of a truncated cone; the probe 23 is set on the insulating column 22 or the insulating plate 25 for flow monitoring Point 24. Monitor the development of the streamer along the surface under the flat electrode structure. During the development of the streamer, the head will be strongly ionized and radiate photons to the space. Stick the black light-proof tape on the light-emitting port of the photomultiplier tube module, leaving a width of about A 1mm slit for receiving photons from the streamer head. Three photomultiplier tube modules with 1mm narrow slits are respectively aimed at the three joint points of the upper and lower plates, and at the midpoint of the two. The photomultiplier tube module receives photons and converts them into weak...

Embodiment 3

[0055] This embodiment combines figure 1 , discloses a gas-solid surface discharge test streamer monitoring and surface potential measurement system, in the figure, 1 is a sealed tank, 2 is an electrode structure, 31 is a four-dimensional displacement platform, 32 is the first controller, and 33 is a two-dimensional displacement Taiwan, 34 is the second controller, 41 is the photomultiplier tube module, 42 is the amplifier unit module, 51 is the electrometer, 52 is the oscillating Calvin probe, 6 is the oscilloscope; 11 is the DC voltage, 12 is the barometer, 13 14 is the quartz observation window, and 7 is the central controller; the system includes a motion control system, a streamer development monitoring system and a surface potential measurement system. The plate electrode structure is composed of an insulating column sandwiched between upper and lower circular metal electrode plates, in which the upper plate is applied with high voltage and the lower plate is grounded. ...

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Abstract

The invention discloses a gas-solid discharge along surface test streamer monitoring and surface potential measuring system. The system includes a hermetic can body, a motion control system, a streamer development monitoring system and a surface potential measuring system. The motion control system is disposed inside the hermetic can body. The motion control system is used for measuring the potential on a lower surface of an electrode structure and monitoring the along surface streamer development. The streamer development monitoring system is used for capturing photons emitted by a streamer head portion of the electrode structure, monitoring the moment when the streamer head portion arrives at a designated position so as to generate the development process of discharge along surface. The surface potential measuring system is intended for measuring the potential of the surface of a solid insulated medium in the electrode structure and acquiring the distribution pattern of surface charges. According to the invention, the system addresses the problem of dynamic seal, can achieve the measurement of the potential of the lower surface of the electrode structure, can monitor dynamic characteristics and static characteristics of discharge along surface, and is conducive to the analysis of pattern of how surface charges influence the insulated medium as well as the mechanism of action.

Description

technical field [0001] The invention relates to the technical field of high-voltage equipment and electronic technology simulation experiments, in particular to a streamer monitoring and surface potential measurement system for gas-solid surface discharge tests. Background technique [0002] The DC circuit breaker is one of the core equipment applied to multi-terminal DC. It is used to break the DC current of the DC line when the fault is interrupted, to protect the main equipment such as the converter valve and the converter transformer, and to switch and Adjust various operating modes. According to the different forms of arc extinguishing, it can be divided into three types: mechanical type, solid state type and hybrid type. Since the solid-state type uses multiple fully-controlled power electronic devices connected in series, the on-state loss is very high, and the application prospect is poor. At present, the main researches are mechanical type and hybrid type. The ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R29/24G01R29/12
CPCG01R31/1218G01R29/12G01R29/24
Inventor 司马文霞杨鸣孙魄韬刘春香
Owner CHONGQING UNIV
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