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Robust controller design for small-signal stability enhancement of power systems

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1 Author(s)
Folly, K.A. ; Dept. of Electr. Eng., Cape Town Univ.

The paper proposes a technique for designing a robust power system stabilizer that combines Hinfin optimal control with the bilinear transformation. The bilinear transformation is used to prevent the pole-zero cancellation phenomenon inherent in the Hinfin mixed sensitivity design and to assign dominant poles at desired locations in the s-plane. The technique is applied to design a power system stabilizer for a single machine connected to an infinite bus. The proposed controller is compared with both a conventional lead-lag controller and a controller design based on an evolutionary algorithm called PBIL (population based incremental learning). Frequency and time domain simulations are presented to demonstrate the effectiveness of the proposed design approach

Published in:

AFRICON, 2004. 7th AFRICON Conference in Africa  (Volume:1 )

Date of Conference:

17-17 Sept. 2004