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    Methods and systems for measuring a rate of change of frequency
    2.
    发明授权
    Methods and systems for measuring a rate of change of frequency 有权
    用于测量频率变化率的方法和系统

    公开(公告)号：US07328114B2

    公开(公告)日：2008-02-05

    申请号：US11298964

    申请日：2005-12-09

    申请人： William Premerlani ,  Rui Zhou

    发明人： William Premerlani ,  Rui Zhou

    IPC分类号： G01R23/16

    CPC分类号： G01R29/18 ,  G01R23/00

    摘要： A method for measuring a rate of change of frequency includes estimating at least one phasor value, estimating a frequency based on the estimated at least one phasor value, compensating the estimated at least one phasor value based on the estimated frequency, calculating a frequency based on the compensated at least one phasor value, and calculating a rate of change of the calculated frequency based on the calculated frequency.

    摘要翻译： 用于测量频率变化率的方法包括估计至少一个相量值，基于估计的至少一个相量估计频率，基于估计的频率补偿估计的至少一个相量值，基于估计的频率计算频率 补偿的至少一个相量值，以及基于计算出的频率计算计算出的频率的变化率。

    Methods and systems for measuring a rate of change of requency
    3.
    发明申请
    Methods and systems for measuring a rate of change of requency 有权
    测量需求变化率的方法和系统

    公开(公告)号：US20070136013A1

    公开(公告)日：2007-06-14

    申请号：US11298964

    申请日：2005-12-09

    申请人： William Premerlani ,  Rui Zhou

    发明人： William Premerlani ,  Rui Zhou

    IPC分类号： G01R23/00

    CPC分类号： G01R29/18 ,  G01R23/00

    摘要： A method for measuring a rate of change of frequency includes estimating at least one phasor value, estimating a frequency based on the estimated at least one phasor value, compensating the estimated at least one phasor value based on the estimated frequency, calculating a frequency based on the compensated at least one phasor value, and calculating a rate of change of the calculated frequency based on the calculated frequency.

    摘要翻译： 用于测量频率变化率的方法包括估计至少一个相量值，基于估计的至少一个相量估计频率，基于估计的频率补偿估计的至少一个相量值，基于估计的频率计算频率 补偿的至少一个相量值，以及基于计算出的频率计算计算出的频率的变化率。

    System and method of locating ground fault in electrical power distribution system
    4.
    发明申请
    System and method of locating ground fault in electrical power distribution system 有权
    配电系统接地故障定位系统及方法

    公开(公告)号：US20060125486A1

    公开(公告)日：2006-06-15

    申请号：US11009111

    申请日：2004-12-10

    申请人： William Premerlani ,  Rui Zhou ,  Yan Liu ,  Thomas Papallo ,  Gregory Lavoie ,  Marcelo Valdes ,  Michael Pintar

    发明人： William Premerlani ,  Rui Zhou ,  Yan Liu ,  Thomas Papallo ,  Gregory Lavoie ,  Marcelo Valdes ,  Michael Pintar

    IPC分类号： G01R31/08

    CPC分类号： G01R31/086 ,  Y04S10/522

    摘要： A method for locating a ground fault in an electrical power distribution system includes providing a plurality of current sensors at a plurality of locations in the electrical power distribution system. The method further includes detecting a ground fault in the electrical power distribution system. Current is monitored at a plurality of locations in the electrical power distribution system via the current sensors and a test signal is introduced into the electrical power distribution system via a test signal generating device. The plurality of locations are monitored to locate the ground fault between a location at which the test signal is detected and a downstream location at which the test signal is not detected.

    摘要翻译： 一种用于定位配电系统中的接地故障的方法包括在电力分配系统中的多个位置处提供多个电流传感器。 该方法还包括检测配电系统中的接地故障。 通过电流传感器在电力分配系统中的多个位置处监视电流，并且经由测试信号产生装置将测试信号引入到电力分配系统中。 监视多个位置以在检测到测试信号的位置与未检测到测试信号的下游位置之间定位接地故障。

    RELAY DEVICE AND CORRESPONDING METHOD
    6.
    发明申请
    RELAY DEVICE AND CORRESPONDING METHOD 有权
    继电器和相关方法

    公开(公告)号：US20080158750A1

    公开(公告)日：2008-07-03

    申请号：US11618175

    申请日：2006-12-29

    申请人： William Premerlani ,  Marcelo Valdes ,  Thomas Frederick Papallo ,  Radoslaw Narel ,  Gregory P. Lavoie

    发明人： William Premerlani ,  Marcelo Valdes ,  Thomas Frederick Papallo ,  Radoslaw Narel ,  Gregory P. Lavoie

    IPC分类号： H02H3/00 ,  G01R31/08

    CPC分类号： H02H7/30 ,  H02H3/081

    摘要： A method of operating a relay device, the method comprising the steps of: providing main circuit-breakers and a bus-tie-breaker connecting the main-circuit-breakers; defining a partial-differential-zone comprising a main circuit breaker and the bus-tie breaker; assigning a first value to the direction of the fault current flowing into the partial differential zone; -assigning a second value to the direction of the fault currents flowing out of the partial-differential-zone, wherein the first value is not equal to the second value; -comparing the values assigned to the fault currents; determining if the fault currents are flowing into the partial differential zone; and determining if at least two of the fault-currents is flowing in a different direction with respect to the partial-differential-zone wherein one of the fault currents is flowing into the partial-differential-zone and one of the fault currents is flowing out of the partial differential zone.

    摘要翻译： 一种操作中继装置的方法，所述方法包括以下步骤：提供主断路器和连接所述主断路器的总线断路器; 限定包括主断路器和母线断路器的部分差分区; 向流入所述偏差区的故障电流的方向分配第一值; - 将第二值分配给从所述部分差分区流出的故障电流的方向，其中所述第一值不等于所述第二值; - 比较分配给故障电流的值; 确定故障电流是否流入偏差区; 以及确定至少两个故障电流是否相对于其中一个故障电流流入部分差分区并且其中一个故障电流流出的部分差分区在不同的方向上流动 的偏差区。