DAMPING OF ELECTROMECHANICAL MODES USING POWER SYSTEM STABILIZERS (PSS) CASE: ELECTRICAL YEMENI NETWORK

Omer M. Awed-Badeeb

   The aim of this paper is to examine the effect of inclusion of a power system stabilizer (PSS) in improving the dynamic stability of different power systems. A nonlinear dynamic model of PSS is applied here to study two electrical network configurations in order to show the influence of PSS controller to damp unstable interarea electromechanical modes. Such modes appeared during a previous study conducted to investigate the dynamic stability of the Yemeni electrical network. Nonlinear simulation using Matlab/Simulink is applied on a single machine infinite bus system to show the effect of using PSS in enhancement of power system dynamics. Also, small signal stability analysis is used in this paper to prove the improvement of voltage stability of the Yemeni network when PSSs are included in system representation.

Keywords: power system dynamics, power system stabilizers, voltage stability, small signal stability

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