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    Combination of Kalman filter and least-error square techniques in power system

    Access Status
    Fulltext not available
    Authors
    Agha Zadeh, R.
    Ghosh, Arindam
    Ledwich, G.
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Agha Zadeh, R. and Ghosh, A. and Ledwich, G. 2010. Combination of Kalman filter and least-error square techniques in power system. IEEE Transactions on Power Delivery. 25 (4): pp. 2868-2880.
    Source Title
    IEEE Transactions on Power Delivery
    DOI
    10.1109/TPWRD.2010.2049276
    ISSN
    08858977
    URI
    http://hdl.handle.net/20.500.11937/20239
    Collection
    • Curtin Research Publications
    Abstract

    An algorithm based on the concept of combining Kalman filter and least-error square (LES) techniques is proposed in this paper. The algorithm is intended to estimate signal attributes like amplitude, frequency and phase angle in the online mode. This technique can be used in protection relays, digitalAVRs, DGs, DSTATCOMs, FACTS, and other power electronics applications. The Kalman filter is modified to operate on a fictitious input signal and provides precise estimation results insensitive to noise and other disturbances. At the same time, the LES system has been arranged to operate in critical transient cases to compensate the delay and inaccuracy identified because of the response of the standard Kalman filter. Practical considerations such as the effect of noise, higher order harmonics, and computational issues of the algorithm are considered and tested in the paper. Several computer simulations and a laboratory test are presented to highlight the usefulness of the proposed method.Simulation results show that the proposed technique can simultaneously estimate the signal attributes, even if it is highly distorted due to the presence of nonlinear loads and noise.

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