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    • 78. 发明授权
    • Method and system for consolidating phase current samples
    • 整合相电流样品的方法和系统
    • US06571182B2
    • 2003-05-27
    • US09776483
    • 2001-02-05
    • Mark Gerard AdamiakWilliam James Premerlani
    • Mark Gerard AdamiakWilliam James Premerlani
    • G06F1134
    • H02H7/263G01R19/25H02H3/05H02H3/28H02H3/40H02H7/045
    • A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current samples; for each phaselet, calculating a respective partial sum of squares of each phase current sample; calculating the sums of the real and imaginary phaselets over a variable size sliding sample window; calculating real and imaginary phasor components from the phaselets and a sum of the partial sums of the squares over the sample window; using the sums of the real and imaginary phaselets, the real and imaginary phasor components, and the sum of the partial sums of the squares to calculate a sum of squares of errors between the phase current samples and a fitted sine wave representative of the real and imaginary phasor components; using the sum of squares of errors to calculate a variance matrix defining an elliptical uncertainty region; determining whether a disturbance has occurred, and, if so, re-initializing the sample window; and determining whether a sum of current phasors from each terminal for a respective phase falls outside of the elliptical uncertainty region for the respective phase.
    • 一种检测输电线路系统故障的方法,包括同时测量每个发送终端各相的相电流采样; 计算包括所述相电流样本的部分和的实部和虚拟相位元; 对于每个阶段,计算每个相电流样本的相应部分平方和; 在可变尺寸的滑动样本窗口上计算实数和虚拟相位的和; 从相位图计算实部和虚部相量分量,以及样本窗口上的平方的部分和的总和; 使用实数和虚拟相位的总和,实相和虚相量分量,以及平方的部分和的和来计算相电流采样和拟合的正弦波之间的平方和之和,所述拟合正弦波表示实数和 假想相量分量; 使用误差平方和来计算定义椭圆不确定区域的方差矩阵; 确定是否发生干扰,如果是,则重新初始化样本窗口; 以及确定来自各个相位的每个终端的电流相量的和是否落在相位相位的椭圆不确定区域之外。
    • 79. 发明授权
    • Digital current differential system
    • 数字电流差动系统
    • US06456947B1
    • 2002-09-24
    • US09698549
    • 2000-10-30
    • Mark Gerard AdamiakGeorge Edmund AlexanderWilliam James PremerlaniEmilie Thorbjorg SaulnierBirsen Yazici
    • Mark Gerard AdamiakGeorge Edmund AlexanderWilliam James PremerlaniEmilie Thorbjorg SaulnierBirsen Yazici
    • G01R3100
    • H02H7/263G01R19/25H02H3/05H02H3/28H02H3/40H02H7/045
    • A method of detecting faults on a power transmission line system includes simultaneously measuring phase current samples at each phase of each transmission terminal; calculating real and imaginary phaselets comprising partial sums of the phase current samples; for each phaselet, calculating a respective partial sum of squares of each phase current sample; calculating the sums of the real and imaginary phaselets over a variable size sliding sample window; calculating real and imaginary phasor components from the phaselets and a sum of the partial sums of the squares over the sample window; using the sums of the real and imaginary phaselets, the real and imaginary phasor components, and the sum of the partial sums of the squares to calculate a sum of squares of errors between the phase current samples and a fitted sine wave representative of the real and imaginary phasor components; using the sum of squares of errors to calculate a variance matrix defining an elliptical uncertainty region; determining whether a disturbance has occurred, and, if so, re-initializing the sample window; and determining whether a sum of current phasors from each terminal for a respective phase falls outside of the elliptical uncertainty region for the respective phase.
    • 一种检测输电线路系统故障的方法,包括同时测量每个发送终端各相的相电流采样; 计算包括所述相电流样本的部分和的实部和虚拟相位元; 对于每个阶段,计算每个相电流样本的相应部分平方和; 在可变尺寸的滑动样本窗口上计算实数和虚拟相位的和; 从相位图计算实部和虚部相量分量,以及样本窗口上的平方的部分和的总和; 使用实数和虚拟相位的总和,实相和虚相量分量,以及平方的部分和的和来计算相电流样本和拟合的正弦波之间的平方和之和,所述拟合正弦波表示实数和 假想相量分量; 使用误差平方和来计算定义椭圆不确定区域的方差矩阵; 确定是否发生干扰,如果是,则重新初始化样本窗口; 以及确定来自各个相位的每个终端的电流相量的和是否落在相位相位的椭圆不确定区域之外。