A NEW EFFICIENT PROCEDURE FOR THE TRANSIENT ANALYSIS OF DISSIPATIVE POWER NETWORKS WITH NONLINEAR LOADS

A new procedure, based on a combined frequency- and time-domain approa ch, is presented for the transient analysis of dissipative power netwo rks with nonlinear loads described by monotone characteristics. Specia l care is paid to the solution of the network transient equations in c ase the line-sections are closed on protective devices such as varisto rs. Networks excited by transient internal sources or external electro magnetic fields are analysed. A simple procedure is implemented to inc lude the simulation of coupling phenomena in the Electromagnetic Trans ient Program (EMTP). Applications are carried out to predict transient voltages and currents in medium-voltage power networks.