Design and modeling of space charge density sensor based on ion counting under high voltage direct current transmission lines

The space charge around the high voltage direct current (HVDC) transmission line has an important influence on its electromagnetic environment. To study the distribution of charge density under HVDC transmission line and its influence mechanism on the electromagnetic environment of transmission line, it is an effective method to measure the space charge density around the transmission line. In this paper, we design and model the space charge density sensor to measure the space charge density under HVDC transmission line. The sensor is structurally optimized by qualitatively and quantitatively analyzing the mechanical structure of the space charge density sensor. The space charge density sensor has been successfully tested and applied in the HVDC test base.