However,
the dramatic increase in power demand and the expanding
scope of human activity in recent years has also created an
accelerated desire for more long-distance power transmission,
power trades between asynchronous AC grids, and integration
of renewable energy. In this context, high voltage direct current
(HVDC) transmission, which has seen steady research and
development over the past century, is currently seen as a
viable option both as a competitor and as a supplement for
AC technology.