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Real-time voltage stability assessment using phasor measurement units: Influence of synchrophasor estimation algorithms by Chathura Thilakarathne; Lasantha Meegahapola; Nuwantha Fernando is a Engineering article available to read on EtoBox.

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loop (PLL) Phasor measurement unit (PMU) Lyapunov exponent Quadrature demodulation Real-time voltage stability Synchrophasors A B S T R A C T Power network operators are rapidly embracing the synchrophasor technology for real-time stability assessment due to its superiority over conventional supervisory control and data acquisition (SCADA) systems. Synchrophasor devices (i.e., phasor measurement units (PMUs)) are procured from different vendors to construct the wide-area measurment systems (WAMSs), and hence the PMUs from different vendors may be based on different synchrophasor estimation algorithms (SEAs). Although all synchrophasor devices comply with the IEEE synchrophasor standard, stability assessment using the phasor estimated via different synchrophasor device types may lead to different stability assessment outcomes. This paper investigates the effect of SEAs on real-time voltage stability evaluation. Three prominent synchrophasor algorithms, namely quadrature demodulation (QD), discrete Fourier transform (DFT), and phasor locked loop (PLL) algorithms are considered in this study. Realtime voltage stability was assessed using an enhanced Lyapunov exponent based algorithm.

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Author

Chathura Thilakarathne; Lasantha Meegahapola; Nuwantha Fernando

Published

2020

Language

EN

Field

Engineering (Physical Sciences)