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Inter area oscillation in large grid is inherent to a large system. However, it is desirable that these oscillations are adequately damped for a secure and reliable transfer of power. Occurrence of Low Frequency oscillations in inter area range have been observed in the Indian grid after the synchronization of Southern grid with the rest of the Indian grid. These oscillations were generally triggered...
Wide-area controllers have been proposed to enhance the dynamic performance of large interconnected power systems. The time delay existing in the data communication may be a detriment to wide area control system stability. This paper analyzes the effect of time delay on the additional interarea damping control (AIADC) design of PSS. The AIADC is proposed for generators' excitation controllers and...
Power system stabilizer (PSS) is one the most economical and effective controllers to enhance the power system damping. Under multioperating conditions, the probabilistic PSS (PPSS) design problem can be formulated as a parameter optimization problem with probabilistic eigenanalysis included and the statistical nature of the eigenvalues is described by their expectations and variances. This paper...
This paper uses the eigenvalue analysis approach to observe the impact of load models on an unstable low-frequency oscillation damping, which recently occurred in the Taiwan power system. In order to enhance oscillation damping, the effect of load models on power system stabilizers is also investigated. Three kinds of the derived load models (a dynamic model, a composite model, and an exponential...
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