Travelling Wave Terminal Simulation by Equivalent Circuit

The implementation of a new three phase travelling wave program is discussed. The unique feature of this program is the use of Thevenin equivalent circuit for representation of line terminal conditions. This allows the use of linear or non-linear differential equations at any line terminal. A new shorthand matrix notation for balanced matrices is used to solve the terminal differential equation for an inductive termination. Parametric results are presented showing the influence of the transmission line X0/X1 on surge levels and effective line-to-ground surge impedance.