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Adaptive Tracking Method of Distorted Voltage Using IMM Algorithm under Grid Frequency Fluctuation Conditions

Author

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  • Haoyao Nie

    (School of Economics and Management, Nanchang University, Nanchang 330031, China
    I.H. Asper School of Business, University of Manitoba, Winnipeg, MB R3T 5V4, Canada)

  • Xiaohua Nie

    (Department of Energy and Electrical Engineering, Nanchang University, Nanchang 330031, China)

Abstract

This paper newly proposes an interactive multiple model (IMM) algorithm to adaptively track distorted AC voltage with the grid frequency fluctuation. The usual tracking methods are Kalman filter (KF) algorithm with a fixed frequency and KF algorithm with frequency identifier. The KF algorithm with a fixed frequency has a larger covariance parameter to guarantee the tracking robustness. However, it has a large tracking error. The KF algorithm with frequency identifier overly depends on the accuracy and stability of frequency identifier. The advantage of the proposed method is that it is decoupled from frequency detection and does not depend on frequency detection accuracy. First, the orthogonal vector dynamic (OVD) tracking model of the sine wave is established. Then, a model set covering the grid frequency fluctuation range is formed, and a new OVD-IMM tracking algorithm is proposed in combination with IMM algorithm. In the end, the effectiveness and accuracy of the proposed OVD-IMM algorithm are verified through simulations and experiments.

Suggested Citation

  • Haoyao Nie & Xiaohua Nie, 2021. "Adaptive Tracking Method of Distorted Voltage Using IMM Algorithm under Grid Frequency Fluctuation Conditions," Energies, MDPI, vol. 14(23), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:23:p:7944-:d:689254
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    References listed on IDEAS

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    1. Benjamin Schäfer & Christian Beck & Kazuyuki Aihara & Dirk Witthaut & Marc Timme, 2018. "Non-Gaussian power grid frequency fluctuations characterized by Lévy-stable laws and superstatistics," Nature Energy, Nature, vol. 3(2), pages 119-126, February.
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