Automatic measuring system for insulating material surface charge two-dimensional distribution

Abstract

The invention discloses an automatic measuring system for insulating material surface charge two-dimensional distribution. The automatic measuring system comprises a sealed cavity which is internally provided with a two-dimensional electronic control displacement platform. A product to be measured is fixed to the two-dimensional electronic control displacement platform through a vertical backboard electrode, and the upper end and the lower end of the product to be measured are connected with a high-voltage electrode and a grounding electrode respectively. The movement end of a one-dimensional magnetic coupling linearly-rotating driver is provided with an insulating clamp. A Kelvin probe is fixed to the insulating clamp, the probe point of the Kelvin probe is perpendicular to the product to be measured, an output signal lead of the Kelvin probe is connected with an electrostatic potentiometer outside the sealed cavity, the signal output end of the electrostatic potentiometer is connected with a data collecting system of a computer, the other side of the sealed cavity is provided with a connecting pipe, and the tail end of the connecting pipe is provided with a vacuum pump. The insulating material surface charge two-dimensional distribution automatic measuring system is used for measuring surface charge density two-dimensional distribution of an insulating material, and the flashover characteristic study content and the charge distribution measuring means of the insulating material are enriched.

Description

technical field [0001] The invention relates to the field of testing discharge characteristics of solid insulating materials, in particular to an automatic measurement system for two-dimensional distribution of charge density on the surface of insulating materials. Background technique [0002] At present, the solid-gap composite insulation system is widely used in high-voltage power equipment, high-power vacuum equipment and other fields. The solid-gap composite insulation system chooses different atmospheres according to different applications. For example, insulators for transmission lines are exposed to atmospheric conditions. Gas-insulated combined switch (GIS) is insulated by SF6 gas, and high-power equipment often uses vacuum-dielectric insulation. The creeping surface of solid-gap is prone to creeping discharge, which makes it the weak link of solid-gap composite insulation system and a key technical problem restricting the insulation of high-voltage equipment. [0...

AI Technical Summary

Problems solved by technology

[0004] Due to technical limitations, the existing surface charge measurement system of insulating materials usually uses self-made electrostatic probes to scan the surface potential distribution of materials. The probes have problems such as low precision, poor anti-interference, and low signal-to-noise ratio, and the scanning results are not accurate enough.

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