The STATCOM is a power electronics device based on the
voltage source converter principle [16]. The technology typically
in use is, depending on voltage level and total rating,
a two- or three-level voltage source converter, controlled by
digital techniques and connected to the power system in shunt
through a filter and possibly a coupling transformer [17].
The SVC consists of a thyristor controlled reactor, and
thyristor or mechanically switched capacitors. For the purpose
of this investigation, the SVC can be considered as a shunt
impedance determined by the parallel connection of the capacitor
and the effective inductance of the thyristor controlled
reactor [6], [16].