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

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...

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.

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