Abstract:
Utilization of the existing transmission line capacity to its fullest is most important due to the
continuous growth of the demand and rising cost of new transmission infrastructures. Due to the
problems associated with voltage drop and stability limits, a transmission line can not be loaded
up to its thermal limit. The potential benefits of installing Flexible AC Transmission System
(FACTS) devices on the system for enhancing power transmission capacity and stability are well
known. Two main members of FACTS family like thyristor controlled series capacitor (TCSC)
and static var compensator (SVC) have been widely studied and reported in technical literature
and have been shown as effective as well as time saving alternative to building new transmission
lines for enhancing power transmission capacity. This thesis examines the application of seriesshunt
compensation by means of TCSC and SVC to enhance power transmission capacity of two
East-West Interconnectors (EWIs) of Bangladesh Power System (BPS). Two SVCs are
connected in parallel with two buses in the western region of the interconnectors and two TCSCs
are connected in series with the interconnectors. Modal analysis is performed to tune parameters
of damping controllers of these FACTS devices. Bifurcation, steady state, and transient analyses
clearly demonstrate positive effect of series-shunt compensation on transmission capacity and
stability in BPS network.
