International Research Journal of Education and Technology

In recent years, power demand has increased substantially while the expansion of power generation and transmission has been severely limited due to limited resources and environmental restrictions. As a consequence, some transmission lines are heavily loaded and the system stability becomes a power transfer-limiting factor. Flexible AC transmission systems (FACTS) controllers have been mainly used for solving various power system steady state control problems. However, recent studies reveal that FACTS controllers could be employed to enhance power system stability in addition to their main function of power flow control. this paper presents a fundamental analysis of the application of first generation FACT device i.e., Static VAR compensators (SVCs) and power system stabilizers (PSSs) for stabilizing power systems.  SVC is basically a shunt connected static var generator whose output is adjusted to exchange capacitive or inductive current so as to maintain or control specific power variable; typically, the control variable is the SVC bus voltage.

Key Words:  Power System, Stability, FACTS Device, Matlab Simulation,