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Stabilizing Controller Design for Nonlinear Power System Using Particle Swarm Optimization

Rekha Chaudhary(1*), Arun Kumar Singh(2), Saligram Agrawal(3)

(1) NIT Jamshedpur, India
(2) Electrical Engineering Department, NIT Jamshedpur, India
(3) NIT Jamshedpur, India
(*) Corresponding author



Major problem of power system is to maintain transient stability and voltage regulation on inception of a severe fault or large change of load. It is required to maintain both the synchronism and post fault voltage regulation for satisfactory operation. In general the transient stability is improved by increasing the excitation rapidly, by this method either the voltage regulation will be achieved or the transient stability could be improved. To improve both the transient stability and voltage regulation of power system simultaneously a composite controller (excitation and governor control) based on direct feedback linearization (DFL) technique is considered in this paper. It is proposed to compute the controller parameters by particle swarm optimization (PSO) technique, a heuristic optimization method. The complete procedure has been explained by an example of a single machine infinite bus system. By simulation it has been shown that both the transient stability and good voltage regulation is achieved by implementing this controller. For simulation MATLAB 7 software is used.
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Nonlinear Systems; State Feedback; Direct Feedback Linearization (DFL); Particle Swarm Optimization (PSO)

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