The design of wide-area supplementary reduced-order DOFC with prescribed stability degree for damping inter-area low-frequency oscillations in uncertain power system | IEEE Conference Publication | IEEE Xplore

The design of wide-area supplementary reduced-order DOFC with prescribed stability degree for damping inter-area low-frequency oscillations in uncertain power system


Abstract:

In this paper, the wide-area supplementary reduced-order dynamic output feedback controller (DOFC) with prescribed stability degree is put forward for uncertain power sys...Show More

Abstract:

In this paper, the wide-area supplementary reduced-order dynamic output feedback controller (DOFC) with prescribed stability degree is put forward for uncertain power system to damp inter-area low-frequency oscillations. Here, the concept of prescribed stability degree α is applied to maintain all the poles on the left of s=-α in the complex plane. The synthetic residue index ratio is adopted to select wide-area input signals. The sufficient conditions of asymptotic stability for uncertain closed-loop power system with prescribed stability degree are derived based on Lyapunov stability theory and transformation operation in complex plane. In addition, a novel LMI-based method is presented to obtain the parameters of reduced-order DOFC and calculate the upper bound of transmission delay for prescribed stability degree. Case studies are carried out on the two-area four-machine system, which is controlled by classical wide-area power system stabilizers (PSSs) and our suggested controller, respectively. The advantages of the proposed method are verified by the simulation results under different external disturbances.
Date of Conference: 17-20 December 2017
Date Added to IEEE Xplore: 08 February 2018
ISBN Information:
Conference Location: Gold Coast, QLD, Australia

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