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Signal Processing Methods for Estimating Small-Signal Dynamic Properties from Measured Responses

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Inter-area Oscillations in Power Systems

Part of the book series: Power Electronics and Power Systems ((PEPS))

Abstract

Power system small-signal electromechanical dynamic properties are often described using linear system concepts. The underlying hypothesis is that small motions of the system can be described by a set of ordinary differential equations. Modal analysis of these governing equations provides considerable insight into the stability properties of the system. Over the past two decades, many signal processing techniques have been developed to conduct modal analysis using only time-synchronized actual system measurements. Some techniques are appropriate for transient signals, others are for ambient signal conditions, and some are for conditions where a known probing signal is exciting the system. In this chapter, an overview of many of the more successful analysis techniques is presented. The theoretical basis for these methods is described as well as application properties and performance. Examples include computer simulations and actual system experiments from the western North American power system. Analysis goals center on estimating the modal properties of the system including modal frequency, damping, and shape.

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Acknowledgments

The authors wish to acknowledge the contribution of the many graduate students over the years. Also, the technical leadership of Dr. John Hauer of Pacific Northwest National Laboratory (retired) and Mr. Bill Mittelstadt of the Bonneville Power Administration (retired) are acknowledged. Much of this work was supported by the US Department of Energy; the authors wish to thank Mr. Phil Overholt for his support.

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  1. Electrical Engineering Department, Montana Tech of the University of Montana, Butte, MT, USA

    Daniel Trudnowski

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Correspondence to Daniel Trudnowski .

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    Trudnowski, D., Pierre, J. (2009). Signal Processing Methods for Estimating Small-Signal Dynamic Properties from Measured Responses. In: Messina, A. (eds) Inter-area Oscillations in Power Systems. Power Electronics and Power Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-89530-7_1

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    • DOI: https://doi.org/10.1007/978-0-387-89530-7_1

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