Analysis of Propagation Law of Electromagnetic Wave During VFT Process in GIS
Yufeng He, Xiaoming Ding, Jin Wang, Yang Sun, Zijian Wang, Fengsong Zhan, Wei Liu, Junjun Liu, Qiang Sun, Ziwei Zhang, Bin Zhou · 2024
The propagation law of the electromagnetic wave during the very fast transient (VFT) process remains unclear, and it may be a reason for the breakdown. In this paper, the propagation of the electromagnetic wave in the gas insulated switchgear (GIS) is analyzed. Both the axial breakdown and the radial breakdown are considered. The simulations are performed in the frequency domain and the time domain. The results show that the electromagnetic wave keeps TEM mode during its propagation in GIS, and thus it will hardly lead to the strengthening of the electric field in some direction. The defects and the amplitude of VFTO may be the reason for the breakdown.