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An extended Kalman filter approach for accurate instantaneous dynamic phasor estimation

Abstract: This paper proposes the application of a non-linear Extended Kalman Filter (EKF) for accurate instantaneous dynamic phasor estimation. An EKF-based algorithm is proposed to better adapt to the dynamic measurement requirements and to provide real-time tracking of the fundamental harmonic components and power system frequencies. This method is evaluated using dynamic compliance tests defined in the IEEE C37.118.1-2011 synchrophasor measurement standard, providing promising results in phasor and frequency estimation, compliant with the accuracy required in the case of off-nominal frequency, amplitude and phase angle modulations, frequency ramps, and step changes in magnitude and phase angle. An important additional feature of the method is its capability for real-time detection of transient disturbances in voltage or current waveforms using the residual of the filter, which enables flagging of the estimation for suitable processing.

 Fuente: Energies. 2018, 11(11), 2918

 Publisher: MDPI

 Publication date: 26/10/2018

 No. of pages: 11

 Publication type: Article

 DOI: 10.3390/en11112918

 ISSN: 1996-1073