Abstract — This paper presents a software tool by which
the users can watch animated travelling waves created along
transmission lines as a result of power system disturbances. It
is implemented in such a way that the discrete time samples of
voltages and currents which are simulated by the ATP-EMTP
program are processed by this software in order to create the
animation. Examples of transients caused by events such as the
DC energization of a single phase transmission line with different
line terminations and ground faults occurring on transmission
lines are used to illustrate the capabilities of the software.