Simulation of Very Fast Transient Overvoltage on UHV 1000kV GIS Test Circuit

Some partial IEC reference circuit models of gas-insulated switchgear (GIS) components have been slightly modified, and make them apply to a wide frequency range which meets VFTO calculation requirement, combine with analytical formulas and the finite element method (FEM), extract the calculation parameters of the main GIS components, establish the equivalent circuit models of the main GIS components. Take a UHV 1000kV GIS test circuit as an example, calculate the very fast transient overvoltage(VFTO) both on the load side and the power supply side of GIS, compare the results of calculations and measurements, Verify the correctness and validity of modeling methods and equivalent circuit models of GIS components.