A new frequency tracking and phasor estimation algorithm for generator protection

D. Hart

doi:10.1109/61.636849

1997-07-01

PRE

DOI：10.1109/61.636849

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摘要

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Digital generator protection is a complex and difficult problem. Analog and solid state methods have been successfully applied to generator protection in the past and implementation of these functions in a digital device is a continuing trend, This paper explores a new method to implement frequency tracking and phasor estimation in a numerical relay, A new algorithm is presented which utilizes a variable window DFT for frequency tracking, Use of the Discrete Fourier Transform (DFT) to compute the phasor estimates at a frequency other than the assumed frequency is outlined first. Next, a new technique for tracking the frequency is outlined, The paper concludes with testing of the new algorithm.