The influence of plasma cleaning power treatment on the surface charge measurement characteristics of insulating materials:
Polymer materials are widely used in power equipment due to their excellent electrical and mechanical properties. In an electrical system composed of metal conductors, polymer materials and gases, when a certain voltage is applied to the conductor, due to tiny burrs on the surface of the conductor or impurities inside the polymer material, it is easy to accumulate charge on the surface of the polymer material , Called surface charge.
The existence of surface charge will have an important impact on the insulation performance of the material. It will not only distort the electric field around itself, but also provide discharge charges and discharge channels for creeping discharge, leading to high voltage breakdown. The dynamic characteristics of the surface charge of the material, especially the attenuation characteristics, reflect to a certain extent the electrical performance of the surface of the dielectric material, and its change will affect the polarization, antistatic performance and flashover performance of the material.
Accurate measurement of surface charge is extremely important for studying the aging, breakdown and flashover characteristics of solid insulating media. In order to enhance the insulation properties of the material, the surface of the material is modified by low-temperature plasma cleaning power plasma technology to accelerate the dissipation of the surface charge.

The low-temperature plasma cleaning power supply plasma contains a large number of high-energy electrons and active particles, which can improve the surface charge performance of the material without changing the properties of the material. The use of low-temperature plasma cleaning power plasma deposition method accelerates the surface charge dissipation characteristics. Using dielectric barrier discharge plasma to modify the surface of the material, it was found that the surface roughness of the material increased after the plasma treatment, and the secondary electron emission coefficient decreased, and the charge dissipation rate of the material surface was significantly accelerated.
When using the plasma cleaning power supply to treat the surface of the material, the discharge parameters need to be adjusted. Definite optimization mainly examines the size of power energy, the area and uniformity of discharge. Plasma treatment can cause a series of physical and chemical changes on the surface of the material, which in turn affects the electrical properties of the dielectric surface.
The amplitude of the large surface potential increases with the increase of the pressure amplitude, but it reaches the saturation state after a certain increase; the pressure time has little effect on the surface potential; the increase of humidity will accelerate the attenuation of the surface potential; the addition of grid grids will Make the surface potential distribution uniform and reduce the large value of the surface potential.
The greater the applied voltage, the smaller the thickness of the medium, the greater the amplitude of the discharge current, and the discharge gap has a smaller effect on the amplitude of the discharge current. Plasma cleaning power supply plasma treatment can significantly accelerate the decay of the surface potential of epoxy resin materials, and the decay rate increases first and then decreases with the prolonging of the treatment time.