An Implemented Approach of Fuzzy Logic Based Controlled STATCOM

Abstract

Transmission networks of modern power systems are becoming increasingly stressed because of growing
demand and restrictions on building new lines. One of the consequences of such a stressed system is the threat of
losing stability following a disturbance. Flexible ac transmission system (FACTS) devices are found to be very effective in
stressing a transmission network for better utilization of its existing facilities without sacrificing the desired stability
margin. Flexible AC Transmission System (FACTS) controllers, such as Static Synchronous Compensator (STATCOM)
and Static VAR Compensator (SVC), employ the latest technology of power electronic switching devices in electric power
transmission systems to control voltage and power flow. A static synchronous compensator (STATCOM) is a shunt
device of the flexible AC transmission systems (FACTS) family . The STATCOM regulates voltage at its terminal by
controlling the amount of reactive power injected into or absorbed from power system. When system voltage is low,
STATCOM generates reactive power and when system voltage is high it absorbs reactive power. The STATCOM
system mainly comprised of three main parts : a Voltage Source converter , a set of coupling reactors or coupling
transformer and a controller