Study of the Impact of X-ray on Negative Needle-Plane Corona Discharge in Atmospheric Air

X-ray induced partial discharge technology has been widely studied in China and abroad. The current research methods are mainly based on experiments, and there are few researches on simulation. In this paper, based on the negative corona discharge hydrodynamic model, the electrons produced by continuous X-ray ionizing the air are quantified and added to the source term of the control equation to analyze the influence of X-ray on the Trichel pulse current and electric field intensity. The simulation results show that X-ray slightly enhances the amplitude of the first Trichel pulse current and significantly increased the repetition rate of Trichel pulse from 340 kHz to 470 kHz. The experimental results are analyzed from the perspective of electric field and charged particle distribution.