Streamer discharge test system, method, streamer generating device and measuring system thereof

Abstract

The invention relates to a streamer discharge test system along a surface of an insulating medium, and a method thereof. The streamer discharge test system comprises a streamer discharge generating device and a measurement system. The streamer discharge generating device comprises the components of: a three-electrode structure which is composed of an upper polar plate, a lower polar plate and a needle electrode; a high-voltage DC power supply which is connected with the upper polar plate; and a trigger pulse generating device which is connected with the needle electrode. The measurement system comprises a first processor and three photomultiplier tubes which are connected with three input ends of the first processor. The other input end of the first processor is connected with the output end of the trigger pulse generating device. The three photomultiplier tubes are correspondingly aligned with the tip of the needle electrode, the middle position between the upper polar plate and the lower polar plate, and the lower surface of the upper polar plate. The method of the invention comprises the steps of: arranging an insulating material sample between the upper polar plate and the lower polar plate; applying a high-voltage square-wave pulse on the needle electrode; generating a uniform electric field between the upper polar plate and the lower polar plate; acquiring output signals of the three photomultiplier tubes; measuring a streamer current; and photographing a streamer discharge process and a travel path. The streamer discharge test system can satisfy a requirement for test and research.

Description

technical field [0001] The invention belongs to the field of basic research on discharge, and in particular relates to a streamer discharge test system, a test method, a streamer discharge generator and a measurement system along the surface of an insulating medium. Background technique [0002] The external insulation problem of power transmission and transformation equipment affects the normal and safe operation of the power system, and with the increase of the voltage level, its problems and effects will become more prominent, directly affecting the power supply quality of the power grid. External insulation problems mainly include air gaps and surface insulation of insulating medium. Gap breakdown and surface discharge flashover are the most serious problems of external insulation. Therefore, it is necessary to conduct more in-depth research on them. [0003] Gap breakdown and dielectric surface flashover include a series of processes: (1) effective initial e...

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Problems solved by technology

However, there is no relevant literature disclosure on the research of streamer discharge along the surface of the insulating medium, and there is no related product

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