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1. 发明授权

US08816729B2 Phase-locked-loop with quadrature tracking filter for synchronizing an electric grid 有权
标题翻译：具有用于同步电网的正交跟踪滤波器的锁相环
公开(公告)号：US08816729B2
公开(公告)日：2014-08-26
申请号：US13468941
申请日：2012-05-10
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
IPC分类号： H03L7/06
CPC分类号： H03L7/00
摘要： Methods and systems for synchronizing an electric grid having unbalanced voltages are provided. A voltage vector may be filtered in a quadrature tracking filter (QTF) to generate a quadrature signal. The inputs to the QTF may be either single input, multiple outputs, or alternatively, multiple inputs, multiple outputs. Furthermore, the second state of either of the two QTF transformations may be either positive or negative. A phase-locked-loop (PLL) operation may be performed on the quadrature signal to monitor a voltage vector between the grid and a connected power converter. The QTF and PLL methods are suitable for either single-phase applications or n-phase (any number of phases) applications.
摘要翻译：提供了用于使具有不平衡电压的电网同步的方法和系统。可以在正交跟踪滤波器（QTF）中对电压矢量进行滤波，以产生正交信号。 QTF的输入可以是单输入，多输出，也可以是多输入，多输出。此外，两个QTF变换中的任一个的第二状态可以是正或负。可以在正交信号上执行锁相环（PLL）操作，以监视电网和连接的功率转换器之间的电压矢量。 QTF和PLL方法适用于单相应用或n相（任意数量级）应用。

2. 发明授权

US08704571B2 Phase-locked-loop with quadrature tracking filter for synchronizing an electric grid 有权
标题翻译：具有用于同步电网的正交跟踪滤波器的锁相环
公开(公告)号：US08704571B2
公开(公告)日：2014-04-22
申请号：US13468905
申请日：2012-05-10
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
IPC分类号： H03L7/06
CPC分类号： H03L7/00
摘要： Methods and systems for synchronizing an electric grid having unbalanced voltages are provided. A voltage vector may be filtered in a quadrature tracking filter (QTF) to generate a quadrature signal. A phase-locked-loop (PLL) operation may be performed on the quadrature signal to monitor a voltage vector between the grid and a connected power converter. The QTF and PLL methods are suitable for either single-phase applications or n-phase (any number of phases) applications. A frequency estimator estimates the grid frequency of the electric grid and outputs the estimated frequency to the QTF algorithms. The frequency estimator may include a three-phase phase-locked-loop (three-phase PLL) suitable for estimating the center frequencies of multiple phases of the electric grid. The frequency estimator may also include means for reducing the harmonics in the grid system.
摘要翻译：提供了用于使具有不平衡电压的电网同步的方法和系统。可以在正交跟踪滤波器（QTF）中对电压矢量进行滤波以产生正交信号。可以在正交信号上执行锁相环（PLL）操作，以监视电网和连接的功率转换器之间的电压矢量。 QTF和PLL方法适用于单相应用或n相（任意数量级）应用。频率估计器估计电网的电网频率，并将估计频率输出到QTF算法。频率估计器可以包括适合于估计电网的多个相位的中心频率的三相锁相环（三相PLL）。频率估计器还可以包括用于减少电网系统中的谐波的装置。

3. 发明申请

US20130120039A1 Phase-Locked-Loop with Quadrature Tracking Filter for Synchronizing an Electric Grid 有权
标题翻译：具有用于同步电网的正交跟踪滤波器的锁相环
公开(公告)号：US20130120039A1
公开(公告)日：2013-05-16
申请号：US13468941
申请日：2012-05-10
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
IPC分类号： H03L7/00
CPC分类号： H03L7/00
摘要： Methods and systems for synchronizing an electric grid having unbalanced voltages are provided. A voltage vector may be filtered in a quadrature tracking filter (QTF) to generate a quadrature signal. The inputs to the QTF may be either single input, multiple outputs, or alternatively, multiple inputs, multiple outputs. Furthermore, the second state of either of the two QTF transformations may be either positive or negative. A phase-locked-loop (PLL) operation may be performed on the quadrature signal to monitor a voltage vector between the grid and a connected power converter. The QTF and PLL methods are suitable for either single-phase applications or n-phase (any number of phases) applications.
摘要翻译：提供了用于使具有不平衡电压的电网同步的方法和系统。可以在正交跟踪滤波器（QTF）中对电压矢量进行滤波以产生正交信号。 QTF的输入可以是单输入，多输出，也可以是多输入，多输出。此外，两个QTF变换中的任一个的第二状态可以是正或负。可以在正交信号上执行锁相环（PLL）操作，以监视电网和连接的功率转换器之间的电压矢量。 QTF和PLL方法适用于单相应用或n相（任意数量级）应用。

4. 发明申请

US20130120038A1 Phase-Locked-Loop with Quadrature Tracking Filter for Synchronizing an Electric Grid 有权
标题翻译：具有用于同步电网的正交跟踪滤波器的锁相环
公开(公告)号：US20130120038A1
公开(公告)日：2013-05-16
申请号：US13468905
申请日：2012-05-10
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Carlos Rodriguez Valdez
IPC分类号： H03L7/00
CPC分类号： H03L7/00
摘要： Methods and systems for synchronizing an electric grid having unbalanced voltages are provided. A voltage vector may be filtered in a quadrature tracking filter (QTF) to generate a quadrature signal. A phase-locked-loop (PLL) operation may be performed on the quadrature signal to monitor a voltage vector between the grid and a connected power converter. The QTF and PLL methods are suitable for either single-phase applications or n-phase (any number of phases) applications. A frequency estimator estimates the grid frequency of the electric grid and outputs the estimated frequency to the QTF algorithms. The frequency estimator may include a three-phase phase-locked-loop (three-phase PLL) suitable for estimating the center frequencies of multiple phases of the electric grid. The frequency estimator may also include means for reducing the harmonics in the grid system.
摘要翻译：提供了用于使具有不平衡电压的电网同步的方法和系统。可以在正交跟踪滤波器（QTF）中对电压矢量进行滤波以产生正交信号。可以在正交信号上执行锁相环（PLL）操作，以监视电网和连接的功率转换器之间的电压矢量。 QTF和PLL方法适用于单相应用或n相（任意数量级）应用。频率估计器估计电网的电网频率，并将估计频率输出到QTF算法。频率估计器可以包括适合于估计电网的多个相位的中心频率的三相锁相环（三相PLL）。频率估计器还可以包括用于减少电网系统中的谐波的装置。

5. 发明申请

US20120212172A1 MODULAR LINE-TO-GROUND FAULT IDENTIFICATION 失效
标题翻译：模块化的线对地故障识别
公开(公告)号：US20120212172A1
公开(公告)日：2012-08-23
申请号：US13031454
申请日：2011-02-21
申请人： Carlos Rodriguez Valdez , Russel J. Kerkman , Rangarajan Tallam
发明人： Carlos Rodriguez Valdez , Russel J. Kerkman , Rangarajan Tallam
IPC分类号： H02P23/00 , H02J4/00
CPC分类号： G01R31/025 , G01R31/42
摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in electrical power conversion systems. In particular, the embodiments described herein include a common mode voltage booster module configured to calculate a common mode voltage boost factor and a common mode voltage boost function based on a plurality of voltage commands for the system. The common mode voltage boost factor and/or the common mode voltage boost function may be applied to the voltage commands to generate boosted voltage commands which, when applied to an inverter or converter, source current indicative of ground faults in the system. More specifically, the common mode voltage boost factor may be multiplied by a common mode voltage calculated by a common mode voltage calculator and summed with the voltage commands. In addition, the common mode voltage boost function may be summed with the voltage commands after the voltage commands have been summed with the common mode voltage boost factor.
摘要翻译：本发明一般涉及用于检测电力转换系统中的接地故障（即，线对地故障）的系统和方法。特别地，本文所述的实施例包括共模电压升压模块，其被配置为基于用于该系统的多个电压指令来计算共模升压因子和共模升压功能。共模升压因子和/或共模升压功能可以被施加到电压指令以产生升压电压命令，当被施加到逆变器或转换器时，指示系统中的接地故障的源电流。更具体地，共模电压升高因子可以乘以由共模电压计算器计算并与电压指令相加的共模电压。此外，共模电压升压功能可以在电压指令与共模升压因子相加之后与电压指令相加。

6. 发明授权

US08319466B2 Modular line-to-ground fault identification 失效
标题翻译：模块化的线对地故障识别
公开(公告)号：US08319466B2
公开(公告)日：2012-11-27
申请号：US13031454
申请日：2011-02-21
申请人： Carlos Rodriguez Valdez , Russel J. Kerkman , Rangarajan Tallam
发明人： Carlos Rodriguez Valdez , Russel J. Kerkman , Rangarajan Tallam
IPC分类号： H02H3/16 , H02H7/08
CPC分类号： G01R31/025 , G01R31/42
摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in electrical power conversion systems. In particular, the embodiments described herein include a common mode voltage booster module configured to calculate a common mode voltage boost factor and a common mode voltage boost function based on a plurality of voltage commands for the system. The common mode voltage boost factor and/or the common mode voltage boost function may be applied to the voltage commands to generate boosted voltage commands which, when applied to an inverter or converter, source current indicative of ground faults in the system. More specifically, the common mode voltage boost factor may be multiplied by a common mode voltage calculated by a common mode voltage calculator and summed with the voltage commands. In addition, the common mode voltage boost function may be summed with the voltage commands after the voltage commands have been summed with the common mode voltage boost factor.
摘要翻译：本发明一般涉及用于检测电力转换系统中的接地故障（即，线对地故障）的系统和方法。特别地，本文所述的实施例包括共模电压升压模块，其被配置为基于用于该系统的多个电压指令来计算共模升压因子和共模升压功能。共模升压因子和/或共模升压功能可以被施加到电压指令以产生升压电压命令，当被施加到逆变器或转换器时，指示系统中的接地故障的源电流。更具体地，共模电压升高因子可以乘以由共模电压计算器计算并与电压指令相加的共模电压。此外，共模电压升压功能可以在电压指令与共模升压因子相加之后与电压指令相加。

7. 发明申请

US20120187883A1 CHOKE WITH CURRENT SENSOR 失效
标题翻译：选择电流传感器
公开(公告)号：US20120187883A1
公开(公告)日：2012-07-26
申请号：US13014640
申请日：2011-01-26
申请人： Carlos Rodriguez Valdez , Rangarajan Tallam , Russel Kerkman
发明人： Carlos Rodriguez Valdez , Rangarajan Tallam , Russel Kerkman
IPC分类号： H02H3/16
CPC分类号： H02H7/10 , H02H3/165 , H02M1/126 , H02M2001/123
摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in motor drive systems. In particular, the embodiments described herein include a common mode choke of a motor drive system having additional (i.e., secondary) turns wound around a core of the common mode choke. These secondary turns are in addition to and separate from a plurality of sets of primary turns wound around the core of the common mode choke, each set of primary turns corresponding to a phase of AC power to which the common mode choke is directly coupled. The secondary turns terminate in series with a burden resistor. Ground faults may be detected by monitoring the voltage across the burden resistor. More specifically, the embodiments described herein include a controller including program instructions for receiving signals indicative of the voltage across the burden resistor, and for monitoring the voltage across the burden resistor to determine when ground faults occur in the motor drive system.
摘要翻译：本发明一般涉及用于检测电机驱动系统中的接地故障（即，线对地故障）的系统和方法。特别地，这里描述的实施例包括电动机驱动系统的共模扼流圈，其具有缠绕在共模扼流圈的芯上的附加（即次级）匝。这些次级绕组是与共模扼流圈的磁芯缠绕的多组初级绕组相加和分开的，每组初级线圈对应于共模扼流圈直接耦合到的交流电源的相位。次级绕组与负载电阻串联终止。可以通过监控负载电阻两端的电压来检测接地故障。更具体地，本文描述的实施例包括控制器，其包括用于接收指示负载电阻器两端的电压的信号的程序指令，以及用于监视负载电阻器两端的电压以确定何时在电动机驱动系统中发生接地故障。

8. 发明授权

US08704481B2 Choke with current sensor 失效
标题翻译：用电流传感器阻塞
公开(公告)号：US08704481B2
公开(公告)日：2014-04-22
申请号：US13014640
申请日：2011-01-26
申请人： Carlos Rodriguez Valdez , Rangarajan Tallam , Russel Kerkman
发明人： Carlos Rodriguez Valdez , Rangarajan Tallam , Russel Kerkman
IPC分类号： H02P27/04
CPC分类号： H02H7/10 , H02H3/165 , H02M1/126 , H02M2001/123
摘要： The present invention relates generally to systems and methods for detecting ground faults (i.e., line-to-ground faults) in motor drive systems. In particular, the embodiments described herein include a common mode choke of a motor drive system having additional (i.e., secondary) turns wound around a core of the common mode choke. These secondary turns are in addition to and separate from a plurality of sets of primary turns wound around the core of the common mode choke, each set of primary turns corresponding to a phase of AC power to which the common mode choke is directly coupled. The secondary turns terminate in series with a burden resistor. Ground faults may be detected by monitoring the voltage across the burden resistor. More specifically, the embodiments described herein include a controller including program instructions for receiving signals indicative of the voltage across the burden resistor, and for monitoring the voltage across the burden resistor to determine when ground faults occur in the motor drive system.
摘要翻译：本发明一般涉及用于检测电机驱动系统中的接地故障（即，线对地故障）的系统和方法。特别地，这里描述的实施例包括电动机驱动系统的共模扼流圈，其具有缠绕在共模扼流圈的芯上的附加（即次级）匝。这些次级绕组是与共模扼流圈的磁芯缠绕的多组初级绕组相加和分开的，每组初级线圈对应于共模扼流圈直接耦合到的交流电源的相位。次级绕组与负载电阻串联终止。可以通过监控负载电阻两端的电压来检测接地故障。更具体地，本文描述的实施例包括控制器，其包括用于接收指示负载电阻器两端的电压的信号的程序指令，以及用于监视负载电阻器两端的电压以确定何时在电动机驱动系统中发生接地故障。

9. 发明申请

US20090296289A1 High Resistance Ground Protection Employing AC Drive Characteristics 有权
标题翻译：采用交流变频器特性的高电阻接地保护
公开(公告)号：US20090296289A1
公开(公告)日：2009-12-03
申请号：US12131195
申请日：2008-06-02
申请人： Carlos Rodriguez Valdez , Russel Kerkman , David Dahl , Jeffrey McGuire , Nickolay Guskov
发明人： Carlos Rodriguez Valdez , Russel Kerkman , David Dahl , Jeffrey McGuire , Nickolay Guskov
IPC分类号： H02H9/08
CPC分类号： H02H3/17 , H02H3/165 , H02H7/0833
摘要： A method and apparatus for identifying a ground fault in a motor drive system that includes at least one three phase power conditioner that is linked to three phase supply lines and to positive and negative DC buses, the method comprising the steps of controlling the power conditioner at an operating frequency to convert power, while controlling the power conditioner to convert power, controlling the power conditioner to apply a common mode signal on each of the three phase supply lines where the common mode signal has a frequency that is different than the operating frequency, sensing the common mode signal on at least one of the three phase supply lines and when the common mode signal on the at least one of the three phase supply lines is greater than a threshold level, indicating that a ground fault has occurred.
摘要翻译：一种用于识别电动机驱动系统中的接地故障的方法和装置，该方法和装置包括至少一个三相电力调节器，其连接到三相电源线以及正和负DC总线，该方法包括以下步骤：控制功率调节器转换功率的工作频率，控制功率调节器以在共模信号具有不同于工作频率的频率的三相电源线中的每一个上施加共模信号，感测三相电源线中的至少一个上的共模信号，并且当三相电源线中的至少一个电源线上的共模信号大于阈值电平时，指示发生了接地故障。

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