Design of a nonlinear power system stabilizer using synergetic control theory |
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Authors: | Zhenhua Jiang |
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Affiliation: | Department of Electrical and Computer Engineering, University of Miami, 1251 Memorial Dr., Coral Gables, FL 33146, USA |
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Abstract: | Electromechanical oscillations of small magnitude and low frequency exist in the interconnected power system and often persist for long periods of time. Power system stabilizers (PSSs) are traditionally used to provide damping torque for the synchronous generators to suppress the oscillations by generating supplementary control signals for the generator excitation system. Numerous techniques have previously been proposed to design PSSs but many of them are synthesized based on a linearized model. This paper presents a nonlinear power system stabilizer based on synergetic control theory. Synergetic synthesis of the PSS is based fully on a simplified nonlinear model of the power system. The dynamic characteristics of the proposed PSS are studied in a typical single-machine infinite-bus power system and compared with the cases with a conventional PSS and without a PSS. Simulation results show the proposed PSS is robust for such nonlinear dynamic system and achieves better performance than the conventional PSS in damping oscillations. |
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Keywords: | Power system stabilizer Synergetic control Stability |
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