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Slow-coherency based composite mode oscillatory stabilization by means of a hybrid PSS

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2 Author(s)
Parsa, M. ; Dept. of Electr. Eng., Tohoku Univ., Sendai, Japan ; Toyoda, J.

The authors address the problem of the stabilization of composite mode electromechanical oscillations of electric generators. A hybrid PSS (power system stabilizer) with a two-level structure composed of a local PSS and a global PSS is proposed. A weighted combination of local and global control signals is used as the supplementary signal for the improvement of the damping characteristics of both local and interarea modes. Time-scale decomposition is applied to the decoupling of the local and interarea modes. Determination of the global control law is based upon a slow-coherency aggregated model

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Power Systems, IEEE Transactions on  (Volume:4 ,  Issue: 4 )