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- Investigation of small-signal electromechanical stability and control interaction problems; - Determination of the most suitable generators in the system for placing Power System Stabilizers (PSS), to damp local and inter-area modes; - Fast identification of system controllers (AVR, PSS, Speed-Governor, HVDC Link, FACTS Devices)whose base case tuning is detrimental to oscillation damping; - Determination of the most suitable buses and circuits in the system for placing FACTS Devices to damp system oscillations or to improve voltage stability; - Controller design (AVR, PSS, Speed-Governor, HVDC Link and FACTS Devices) through frequency response, root locus and/or pole allocation techniques, considering either a full model or a simplified model of the large-scale power system; - Choice of control loops and combination of signals best suited for power system stabilization. Determinations of gain and phase margins of the various control loops; - Linear time response to changes in controller set points or load increments applied anywhere in the system; - Analysis of the impact of load modeling on small-signal electromechanical and voltage stability; - Analysis of Subsynchronous Resonance problems. More advanced applications include: - Root locus plots for large models, when varying multiple system parameters Root Contours; - Model-order reduction based on dominant poles of multivariable transfer functions; - Macro functions (scripts), which yield high program automation; - Coordinated design of power oscillation damping controllers considering various system operational conditions; - Nonlinear search for stability boundaries in the control parameters space; - Investigation of system controllers' robustness due to
system parametric variation.
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