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    Method and apparatus for compensation of phasor estimations
    1.
    发明授权
    Method and apparatus for compensation of phasor estimations 失效
    用于补偿相量估计的方法和装置

    公开(公告)号：US6141196A

    公开(公告)日：2000-10-31

    申请号：US32948

    申请日：1998-03-02

    申请人： William James Premerlani ,  David Jeremiah Hoeweler ,  Albert Andreas Maria Esser ,  James Patrick Lyons ,  Gerald Burt Kliman ,  Rudolph Alfred Albert Koegl ,  Mark Gerald Adamiak

    发明人： William James Premerlani ,  David Jeremiah Hoeweler ,  Albert Andreas Maria Esser ,  James Patrick Lyons ,  Gerald Burt Kliman ,  Rudolph Alfred Albert Koegl ,  Mark Gerald Adamiak

    IPC分类号： G01R19/25 ,  H02H1/00 ,  H02H3/00

    CPC分类号： H02H1/0092 ,  G01R19/2513 ,  G01R31/343

    摘要： A method for obtaining a power system phasor includes sampling a power system signal at instants determined by a nominal power system frequency to provide a plurality of data samples; using the data samples to estimate a phasor having an elliptical trajectory; generating a deviation formula representing a frequency deviation between actual and nominal power system frequencies; and using the deviation formula to perform a coordinate transform of the estimated phasor to provide a scaled phasor having a substantially circular trajectory. If the data samples are unevenly spaced, a method in another embodiment includes minimizing squares of errors between the unevenly spaced data samples and an approximating sinusoidal function of the data samples. Power system phasors can be used to detect turn faults by providing scaled current and voltage phasors; extracting fundamental voltage and current phasors; and applying a symmetrical component transform to the fundamental voltage and current phasors to obtain symmetrical component voltage and current phasors for use in determining the existence of a turn fault. Variance calculations and/or trigonometric function fits can be used to increase sensitivity of fault detection.

    摘要翻译： 一种用于获得电力系统相量的方法包括在由标称电力系统频率确定的时刻对电力系统信号进行采样，以提供多个数据样本; 使用数据样本来估计具有椭圆轨迹的相量; 产生表示实际和标称功率系统频率之间频率偏差的偏差公式; 并且使用偏差公式来执行所估计的相量的坐标变换，以提供具有基本圆形轨迹的缩放相量。 如果数据采样不均匀，则另一实施例中的方法包括最小化不均匀间隔的数据样本之间的误差平方和数据采样的近似正弦函数。 电力系统相量可用于通过提供定标的电流和电压相量来检测转向故障; 提取基波电压和电流相量; 并将对称分量变换应用于基波电压和电流相量，以获得用于确定匝间故障的存在的对称分量电压和电流相量。 方差计算和/或三角函数拟合可用于提高故障检测的灵敏度。

    Self-tuning and compensating turn fault detector
    2.
    发明授权
    Self-tuning and compensating turn fault detector 失效
    自调谐补偿回路故障检测器

    公开(公告)号：US5786708A

    公开(公告)日：1998-07-28

    申请号：US617718

    申请日：1996-04-01

    申请人： William James Premerlani ,  Gerald Burt Kliman ,  David Jeremiah Hoeweler ,  Rudolph Alfred Albert Koegl

    发明人： William James Premerlani ,  Gerald Burt Kliman ,  David Jeremiah Hoeweler ,  Rudolph Alfred Albert Koegl

    IPC分类号： G01R31/06 ,  G01R31/34

    CPC分类号： G01R31/343 ,  G01R31/346

    摘要： A method for detecting turn faults in an induction motor includes obtaining motor current and voltage waveforms and converting the motor current and voltage waveforms to digitized current and voltage waveforms. Fundamental phasors of the digitized current and voltage waveforms are extracted and, a symmetrical component transform is applied to the fundamental phasors to obtain symmetrical component current and voltage phasors including a negative sequence voltage phasor (V.sub.-) and negative sequence current phasor (I.sub.-). A fault injected negative sequence current (Ii.sub.-) is estimated according to the following equation: Ii.sub.- =I.sub.- -V.sub.- /Z.sub.- -Ir, wherein Z.sub.- is a characteristic negative sequence impedance and Ir is a residual injected negative sequence current. The existence of a turn fault is determined by comparing the estimated fault injected negative sequence current with a threshold fault injected negative sequence current.

    摘要翻译： 用于检测感应电动机中的匝故障的方法包括获得电动机电流和电压波形，并将电动机电流和电压波形转换成数字化的电流和电压波形。 提取数字化电流和电压波形的基本相量，对基本相量施加对称分量变换，以获得包括负序电压相量（V-）和负序电流相量（I-）的对称分量电流和电压相量， 。 根据以下等式估计故障注入的负序电流（Ii-）：Ii- = I-V- / Z-Ir，其中Z-是特征负序阻抗，Ir是残留注入的负序电流 。 通过将估计故障注入的负序电流与阈值故障注入的负序电流进行比较来确定转向故障的存在。

    MICRO-ELECTROMECHANICAL SWITCH PROTECTION IN SERIES PARALLEL TOPOLOGY
    5.
    发明申请
    MICRO-ELECTROMECHANICAL SWITCH PROTECTION IN SERIES PARALLEL TOPOLOGY 有权
    微机电开关保护系列平行拓扑

    公开(公告)号：US20100061024A1

    公开(公告)日：2010-03-11

    申请号：US12209064

    申请日：2008-09-11

    申请人： William James Premerlani ,  Kathleen Ann O'Brien ,  Owen Jannis Schelenz

    发明人： William James Premerlani ,  Kathleen Ann O'Brien ,  Owen Jannis Schelenz

    IPC分类号： H01H73/18

    CPC分类号： H01H59/0009 ,  H01H71/00 ,  H01H2071/008

    摘要： An electrical switching device is presented. The electrical switching device includes multiple switch sets coupled in series. Each of the switch sets includes multiple switches coupled in parallel. A control circuit is coupled to the multiple switch sets and configured to control opening and closing of the switches. One or more intermediate diodes are coupled between the control circuit and each point between a respective pair of switch sets.

    摘要翻译： 提出一种电气开关装置。 电气开关装置包括串联耦合的多个开关组。 每个开关组包括并联耦合的多个开关。 控制电路耦合到多个开关组并且被配置为控制开关的打开和关闭。 一个或多个中间二极管耦合在控制电路和相应的一对开关组之间的每个点之间。

    GROUND FAULT PROTECTION CIRCUIT FOR MULTI-SOURCE ELECTRICAL DISTRIBUTION SYSTEM
    7.
    发明申请
    GROUND FAULT PROTECTION CIRCUIT FOR MULTI-SOURCE ELECTRICAL DISTRIBUTION SYSTEM 有权
    多源电力分配系统的接地故障保护电路

    公开(公告)号：US20100008000A1

    公开(公告)日：2010-01-14

    申请号：US12172809

    申请日：2008-07-14

    申请人： Donville Andre Riley ,  Brian Matthew Aiken ,  William James Premerlani

    发明人： Donville Andre Riley ,  Brian Matthew Aiken ,  William James Premerlani

    IPC分类号： H02H3/00

    CPC分类号： H02H7/261 ,  H02H3/347

    摘要： Disclosed herein is a ground fault protection circuit for an electrical distribution system, the electrical distribution system having a plurality of power sources each having an associated main circuit breaker and being electrically coupled to an associated load with a tie circuit breaker electrically coupled therebetween, the main and tie circuit breakers having associated therewith phase and neutral current transformers (CTs) for sensing an associated current. The ground fault protection circuit includes first, second and third auxiliary differential current transformers, each in signal communication with outputs of respective phase and neutral current transformers associated with respective first and second main circuit breakers and a tie circuit breaker. A control circuit has a defined topology that provides signal communication between each of the auxiliary differential current transformers.

    摘要翻译： 本文公开了一种用于配电系统的接地故障保护电路，该配电系统具有多个电源，每个电源具有相关联的主断路器并且电耦合到相关联的负载，其中电连接在它们之间的接线断路器，主电源 以及具有相关联的用于感测相关电流的相位和零线电流互感器（CT）的断路器。 接地故障保护电路包括第一，第二和第三辅助差动电流互感器，每个互感器与与相应的第一和第二主断路器相关的各相和零线电流互感器的输出信号通信，以及连接断路器。 控制电路具有定义的拓扑，其提供每个辅助差动电流互感器之间的信号通信。