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    Two digital filtering algorithms for fast estimation of symmetrical components in a power system: A static estimation approach

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    Date
    2003
    Author
    Alammari, R.A.
    Soliman, S.A.
    Mostafa, M.A.
    El-Hawary, M.E.
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    Abstract
    This paper presents the application of two digital filters working together for fast estimation of power systems symmetrical components. The three-phase unbalanced system is transformed to two phases using α–β-transformation. Using such a transformation, harmonics of order 3 and their multiples, in the input signal, are suppressed. Having identified the two-phase voltages, the positive and negative sequence phase voltage can be calculated using a constant transformation matrix. The zero sequence component is easily estimated by averaging the unbalanced three-phase voltage at every sample instant. Least error square algorithm is used to identify the magnitude and phase angle of sequence components from the available samples of the specified component.
    DOI/handle
    http://dx.doi.org/10.1016/S0378-7796(03)00014-2
    http://hdl.handle.net/10576/55326
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    • Electrical Engineering [‎2821‎ items ]

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