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    • 70. 发明授权
    • Method and arrangement for estimating angular frequency
    • 估计角频率的方法和装置
    • US08751177B2
    • 2014-06-10
    • US13075827
    • 2011-03-30
    • Gerardo EscobarAntonio CocciaLeonardo-Augusto SerpaSami PetterssonYales De-Novaes
    • Gerardo EscobarAntonio CocciaLeonardo-Augusto SerpaSami PetterssonYales De-Novaes
    • G06F19/00G01R23/02
    • G01R23/02G01R19/2513
    • An exemplary method and arrangement for estimating the frequency and the positive sequence of a fundamental component of a measured three-phase voltage are disclosed (ναβ). The method includes measuring the three-phase voltage (ναβ), calculating estimates of a fundamental frequency voltage component ({circumflex over (ν)}αβ,1) and a difference ({circumflex over (φ)}αβ,1) between positive and negative sequence components of the fundamental frequency voltage from an error ({tilde over (ν)}αβ) between the measured three-phase voltage (ναβ) and at least one of the calculated estimates of the fundamental frequency voltage component ({circumflex over (ν)}αβ,1) and from an estimate of the angular frequency ({circumflex over (ω)}0) of the fundamental frequency voltage component, wherein the estimate of the angular frequency ({circumflex over (ω)}0) of the fundamental frequency voltage component is calculated from at lest one of the estimated differences ({circumflex over (φ)}αβ,1) and from the error ({tilde over (ν)}αβ) between the measured three-phase voltage and at least one of the calculated estimates of the fundamental frequency voltage component.
    • 公开了一种用于估计测量的三相电压的基波分量的频率和正序列的示例性方法和装置(&ngr;α&bgr;)。 该方法包括测量三相电压(&ngr;α&bgr;),计算基频电压分量({gyflex over(&ngr;)}α&bgr;,1)和差({circumflex over(&phgr α&bgr; 1)在测量的三相电压(&ngr;α&bgr)之间的误差({ti =(&ngr;)}α&bgr))的基频电压的正和负序分量之间, 基频电压分量的估计值({circumflex over(&ngr;)}α&bgr;,1)以及基频电压分量的角频率({回旋过(ω)} 0)的估计,其中估计 基本频率电压分量的角频率({circumflex over(ω)} 0)从估计的差异({circumflex over(&phgr?)}α&bgr;,1)和误差({ 测量的三相电压与计算的至少一个之间的波形(&ngr;)}α&bgr 估计基频电压分量。