A. Preface
Most of transformer-terminated double circuit line
configurations have reported Ferroresonances, which are
caused by capacitive coupling between double circuit lines.
Power transformers are connected to de-energized
transmission lines of considerable length, which run parallel to
another energized line.
In Manitoba Hydro network, transformers in Silver station
are taped from A3R line of A3R-A4D double circuit line,
which is routed between Ashern and Rosser station. Grand
Rapids is connected to Ashern station by G1A-G2A double
circuit line. Several Ferroresonances are obtained by
simulation with different arrangements. These arrangements
are kinds of transformer-terminated double circuit
transmission line configuration. In obtained Ferroresonant
arrangements, both lines are remained energized. Hence,
capacitive coupling of lines is not the only reason of occurring
ferroresonance. In the following, one of these configurations is
explained.