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Measurement-Based Estimation of System State Matrix for AC Power Systems with Integrated VSCs

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Document pages: 6 pages

Abstract: In this paper, a wide-area measurement system (WAMS)-based method is proposedto estimate the system state matrix for AC system with integrated voltagesource converters (VSCs) and identify the electromechanical modes. The proposedmethod is purely model-free, requiring no knowledge of accurate networktopology and system parameters. Numerical studies in the IEEE 68-bus systemwith integrated VSCs show that the proposed measurementbased method canaccurately identify the electromechanical modes and estimate the dampingratios, the mode shapes, and the participation factors. The work may serve as abasis for developing WAMS-based damping control using VSCs in the future.

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