Multi-physics Coupling Simulation Model of Corona Charge Distribution on Rotating Wind Turbine Blade Tip

Abstract:
In this paper, a multi-physics coupling simulation model of corona charge distribution of rotating wind turbine is estab-lished. Considering the spatial flow field caused by the rotation of the wind turbine, the background electric field gener-ated by thundercloud and the ion flow field generated by corona discharge, the temporal and spatial dynamic distribu-tion of corona charge at the tip of the blade is calculated when the wind turbine is stationary and rotating. It is found that when the wind turbine is stationary, the corona charge shows an elliptical distribution above the wind turbine. When the wind turbine rotates, the corona charge at the tip of the blade shows an arc distribution on the rotating trajectory of the wind turbine. The corona charge will move upward in an arc shape to the negative thundercloud, and the migration range of charge is smaller than that when the wind turbine is stationary.