Research on the Factors Influencing the UV Detection of Corona Discharge Under Combined AC-DC Voltage

In order to better study the relationship between corona discharge intensity and UV detection image characteristics, this paper investigates the variation characteristics of corona discharge pulse current and its UV photon number under different electrode shapes by building a corona discharge simulation test platform with combined AC-DC voltage. The influence of air pressure and humidity on establishing the relationship between corona current-photon number based on the tip-plate electrode model is also explored. The result shows that the shape of the electrode and the uniformity of the electric field have certain effects on the corona current. Besides, the change of air pressure does not cause significant changes in the relationship between the corona current and the photon number. But the increase of humidity will intensify the UV refraction phenomenon, which will reduce the detected photon number.