Covariance management based RLS algorithm for phasor estimation in severely noisy systems

  • De Almeida L
  • Lima A
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Abstract

This paper presents a new algorithm, derived from the recursive
least squares (RLS), to estimate power system voltage and current
harmonics for digital relay purposes. The algorithm is based on the RLS
covariance matrix management, by making use of the covariance resetting
in a different way. The approach provides a kind of attractor that
absorbs all nonmodeled dynamics. In order to demonstrate its
effectiveness, the proposed algorithm is applied to simulated signals
and its performance is compared with other conventional methods

Author-supplied keywords

  • Adaptive prediction
  • Covariance management
  • Digital relaying
  • RLS

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Authors

  • Luiz A.L. De Almeida

  • Antonio C.De C. Lima

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