Abstract:
For smooth working of a power system, it is necessary that all generators working in
a power system must be synchronized i.e., operate at some fixed constant frequency.
In power system generators and loads are connected through a network. If any
generator deviates from synchronous speed due to some fault, resultantly all
generators in system gets also affected. In the presence of disturbance low frequency
oscillations produce and propagate in all machines. A safe operation of an
interconnected Power System is mainly depended on sufficient damping of these
oscillations. Thus, if a proper control mechanism is not used in Power System, there
are high chances of blackout. This research develops a controlling mechanism of low
frequency oscillations by using control system theory. In this research a reduce order
H-infinity damping controller is design by using Loop Shaping technique. The
designed controller is a low-cost solution for such problems with much better results
in modern interconnected Power Systems. To test effectiveness of designed controller
a prototype model of inter-connected New England test system (NETS) and New
York power system (NYPS) is taken. The time domain simulation of disturbed system
without and with controller has been performed by using MATLAB. Results shows
that the developed controller successfully removes the low frequency oscillations,
maintains synchronism among generators and guarantees the stability of Power
System
