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Magnitude-cum-phase angle error-based WL adaptation for frequency estimation of three-phase power system

Magnitude-cum-phase angle error-based WL adaptation for frequency estimation of three-phase power system

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Motivated by the need for robust frequency estimation for both balanced and unbalanced power system conditions and the fact that most of the existing techniques perform poorly in the presence of external interferences, a more noise-resilient widely linear least mean kurtosis (WL-LMK) algorithm is proposed that uses both the magnitude and phase angle errors for online estimation of three-phase power system frequency. The proposed method makes use of the full second-order information within the complex-valued system voltage through Clarke's transformation and the concept of augmented complex statistics and WL modelling. The effectiveness of the proposed scheme is verified through simulation studies of synthetic signals and experimental data.

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.6911
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