control output current over the rated maximum capacitive or inductive range independent
of the AC system voltage. It can provide full capacitive output current at any practical
system voltage when STATCOM is at the maximum limit. This is contrast to the SVC
which can supply only diminishing output current with decreasing system voltage as
determined by the designed maximum equivalent capacitive admittance. This type of
controller is, therefore, more effective than the SVC in providing transmission voltage
support and the expected stability improvements. In general, a reduction of more than 50
% in the physical size of installation can be expected when a STATCOM is compared to
SVC. Also, for steady state reactive support, a STATCOM is capable of supporting higher
loads than what would be possible with a SVC of comparable MVAr rating [11], [14]