Digital filter for phasor estimation applied to distance relays. Issue 14 (1st November 2015)

• Record Type: Journal Article
• Authors: Zamora, Alejandro; Ramirez, Juan M.; Arrieta Paternina, Mario R.; Vazquez‐Martinez, Ernesto
• Is Part Of: IET generation, transmission & distribution. Volume 9:Issue 14(2015)
• Page Start: 1954
• Page End: 1963
• Publication Date: 2015-11-01
• Subjects: relay protection -- Kalman filters -- Fourier transforms -- recursive estimation -- transient response; digital filter -- distance relays -- transient response -- Taylor‐Kalman‐Fourier filter -- TKF filter -- dynamic phasor -- transient operating conditions -- signal model -- Kth Taylor polynomial -- Kalman subspaces -- Fourier subspaces -- recursive property -- impedance estimation -- fault conditions; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2014.1220
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : The transient response of the digital filter for relaying purposes has been improved by means of the Taylor–Kalman–Fourier (TKF) filter. This filter is focused on a dynamic phasor, which is adapted to the transient operating conditions and is based on a signal model that is approximated by the K th Taylor polynomial. This model is extended to the Kalman and Fourier subspaces in order to provide instantaneous estimates through its recursive property. The TKF renders instantaneous phasor estimates at each sample and enhances the impedance estimation under fault conditions. This fact and the results demonstrate the applicability of the proposition for distance relays.