Analysis of SVC and STATCOM for voltage regulation and transfer capability

Abstract

With the effect of restrictions on building new linesandgrowing demand, Transmission
networks of modern power systems are becoming more stressed. One of the solutions of such a stressed
system is the Flexible actransmission system (FACTS) devices.For the proper utilization of the existing
network without sacrificing the desired stability margin; FACTS devices are the most efficient in a
transmissionnetwork. For the controlling of voltage and power flow, the Flexible AC Transmission
System (FACTS) such as Static VAR Compensator (SVC) and Static SynchronousCompensator
(STATCOM) are the most efficient power electronic switching devices in power transmission networks.
From the family of flexible AC transmission systems (FACTS), the static synchronous compensator
(STATCOM) is a shunt device of this family.By the controlling an amount of reactivepower absorbed
from or injected into power system, the STATCOM regulates its terminal voltage.STATCOM absorbs
reactive power,when the voltage of system is high and it generates reactive power,when the voltage of
system is low.In this paper,comparison between performance of SVC and STATCOM is done. The
simulation result proves the effectiveness of these devices in improving power transfer capability.