delay compensator is finally shown for a wide range of signal
transmission delays. The designed SVC controller shows a superior performance in damping the
inter-area oscillations despite the signal transmission delays.
KEYWORDS: power system damping, Static Var Compensator (SVC), Flexible AC
Transmission Systems (FACTS), Phasor Measurement Unit (PMU), wideareameasurement
Electromechanical oscillation (0.1 to 2.0 Hz) is a phenomenon inherent to power
systems . There are mainly two types of electromechanical oscillations
involved in power
-domain behaviour of the oscillations for the frequency
and electrical power with the East (Poland)–West (Spain) mode excited
(RWE, Dr. Grebe).
Figure 2 Rotor mode shape with the East (Poland)-West (Spain) mode
(Spain) mode excited. The behaviors show that the group
of generators on the East side (Poland) is swinging against
the group of generators on the West side (Spain). Thus,
the best signal to be used as an input to the controller, for
damping the dominant inter-area mode, would be from
the location where the oscillations are well observable.
provided by the prediction agents. A multi-agent-based coordinated control scheme is proposed in [ 15 , 16 ] where multi-agent framework is developed through wideareameasurements (WAMs). In [ 17 , 18 ] an output tracking agent is used to track the output where the output of the generator is considered as the rotor angle of the generator and the control agent is used to initiate the turbine valving control. In practice, the rotor angle of generators may not be conveniently measured [ 19 , 20 ]. The multi-agent frameworks so far presented in this paper are mainly