Nishimura, ShotaroMvuma, AloysHinamoto, Takao2020-03-242020-03-242013Nishimura, S., Mvuma, A., & Hinamoto, T. (2013). Complex adaptive notch filters for frequency estimation of three-phase power systems. In 2013 European Conference on Circuit Theory and Design (ECCTD) (1-4). IEEE.10.1109/ECCTD.2013.6662321http://hdl.handle.net/20.500.12661/2332Abstract. Full Text is available at: https://ieeexplore.ieee.org/abstract/document/6662321/This paper presents a new technique for adaptive estimation of the frequency of unbalanced three-phase power systems using complex coefficient first-order notch filters. The input complex sinusoid is given by a sum of sequences with positive and negative frequencies. The analytical expression of a estimation error oscillation introduced by the sequence with negative frequency has been derived. Closed form expression for frequency tracking error has been also derived for a complex linear chirp signal. Computer simulation results are presented to validate the analysis.enIIR filtersFrequency estimationAdaptive filtersFiltering algorithmsBand-pass filtersPower systemsOscillatorsConference Proceedings