Amplitude frequency characteristic of TEV in substation with RCD

The transient earth voltage (TEV) will be superposed on the shell when the Disconnector switch is operated if the reactive compensation device (RCD) is installed in the substation. The partial separation element method (PSEM) is used to obtain the frequency variation parameters of the equipment in this paper, and the mathematical analysis method is used to calculate the TEV installed in the RCD substation. The amplitude frequency characteristic curve of TEV and the influence of RCD installation position on the corresponding amplitude of TEV main frequency are obtained by the simulation analysis. The influence of SCSR inlet capacitance and series compensation to ground capacitance on the corresponding amplitude of TEV main frequency is completed. The results show that the TEV oscillation of GIS is more intense when the installation of RCD in substation, the peak value of TEV has no obvious change, and the amplitude corresponding to the main frequency of TEV has been greatly increased. TEV decreases when the distance between RCD and GIS increases. The change of series compensation to ground capacitance will not affect the main frequency amplitude of TEV.