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1. 发明授权

US09331487B2 Method and apparatus for islanding detection for grid tie converters 有权
标题翻译：并网转换器孤岛检测方法及装置
公开(公告)号：US09331487B2
公开(公告)日：2016-05-03
申请号：US13827630
申请日：2013-03-14
申请人： Zhenhuan Yuan , Shaofeng Zhang , Haihui Lu , Lixiang Wei , Russel J. Kerkman , Richard Lukaszewski , Ahmed Mohamed Sayed Ahmed , Robert J. Breitzmann
发明人： Zhenhuan Yuan , Shaofeng Zhang , Haihui Lu , Lixiang Wei , Russel J. Kerkman , Richard Lukaszewski , Ahmed Mohamed Sayed Ahmed , Robert J. Breitzmann
IPC分类号： H02J3/38
CPC分类号： H02J3/382 , H02J3/386 , H02J2003/388 , Y02E10/763 , Y10T307/642
摘要： Methods and apparatus are presented for unintentional islanding detection for grid tie converters in which the phase angle disturbance is introduced by modification of grid side converter switching control signals and a mismatch of reactive power between generation and the grid load is formed upon the occurrence of unintentional islanding, where the applied phase disturbance is determined according to two pre-defined curves to form an equivalent positive feedback at different frequencies to prevent the converter from forming an island at a new stable frequency after the grid is disconnected.
摘要翻译：给出了并网转换器的无意孤立检测方法和装置，其中通过修改电网侧转换器开关控制信号引入相位角扰动，并且在无意孤岛发生时形成发电与电网负载之间的无功功率失配其中施加的相位干扰根据两个预定义曲线确定，以在不同频率处形成等效的正反馈，以防止转换器在网格断开之后以新的稳定频率形成岛。

2. 发明申请

US20140265596A1 METHOD AND APPARATUS FOR ISLANDING DETECTION FOR GRID TIE CONVERTERS 有权
标题翻译：用于网格转换器的岛屿检测的方法和装置
公开(公告)号：US20140265596A1
公开(公告)日：2014-09-18
申请号：US13827630
申请日：2013-03-14
申请人： Zhenhuan YUAN , Shaofeng ZHANG , Haihui LU , Lixiang WEI , Russel J. Kerkman , Richard Lukaszewski , Ahmed Mohamed Sayed Ahmed , Robert J. Breitzmann
发明人： Zhenhuan YUAN , Shaofeng ZHANG , Haihui LU , Lixiang WEI , Russel J. Kerkman , Richard Lukaszewski , Ahmed Mohamed Sayed Ahmed , Robert J. Breitzmann
IPC分类号： H02J3/38
CPC分类号： H02J3/382 , H02J3/386 , H02J2003/388 , Y02E10/763 , Y10T307/642
摘要： Methods and apparatus are presented for unintentional islanding detection for grid tie converters in which the phase angle disturbance is introduced by modification of grid side converter switching control signals and a mismatch of reactive power between generation and the grid load is formed upon the occurrence of unintentional islanding, where the applied phase disturbance is determined according to two pre-defined curves to form an equivalent positive feedback at different frequencies to prevent the converter from forming an island at a new stable frequency after the grid is disconnected.
摘要翻译：给出了并网转换器的无意孤立检测方法和装置，其中通过修改电网侧转换器开关控制信号引入相位角扰动，并且在无意孤岛发生时形成发电与电网负载之间的无功功率失配其中施加的相位干扰根据两个预定义曲线确定，以在不同频率处形成等效的正反馈，以防止转换器在网格断开之后以新的稳定频率形成岛。

3. 发明授权

US08736091B2 Converter lifetime improvement method for doubly fed induction generator 有权
标题翻译：双馈感应发电机转换器寿命改善方法
公开(公告)号：US08736091B2
公开(公告)日：2014-05-27
申请号：US12818895
申请日：2010-06-18
申请人： Lixiang Wei , Russel J. Kerkman , Richard A. Lukaszewski , Haihui Lu , Zhenhuan Yuan
发明人： Lixiang Wei , Russel J. Kerkman , Richard A. Lukaszewski , Haihui Lu , Zhenhuan Yuan
IPC分类号： H02P9/04 , G01B3/52
CPC分类号： H02M7/537 , G01B3/52 , G05F1/67 , H02M1/32 , H02P9/007
摘要： The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.
摘要翻译：本技术包括用于操作转换器以保持转换器寿命的方法和系统。在一些实施例中，可以增加转换器的工作频率，使得可以在转换器的接合线上减小应力。更具体地，实施例涉及为以最大功率点跟踪（MPPT）模式操作的转换器的某些操作条件计算老化参数，并且确定MPPT操作是否导致转换器老化到将转换器寿命降低到期望寿命以下的点。如果MPPT操作将转换器寿命降低到期望的寿命以下，则可以增加转换器的频率，使得可以将转换器控制为以MPPT的百分比进行操作。因此，在一些实施例中，可以相对于维持转换器的期望寿命来优化功率输出。

4. 发明授权

US08432052B2 Wind power converter system with grid side reactive power control 有权
标题翻译：具有电网侧无功功率控制的风力发电系统
公开(公告)号：US08432052B2
公开(公告)日：2013-04-30
申请号：US12789285
申请日：2010-05-27
申请人： Haihui Lu , Lixiang Wei , Richard A. Lukaszewski , Russel J. Kerkman , Zhenhuan Yuan
发明人： Haihui Lu , Lixiang Wei , Richard A. Lukaszewski , Russel J. Kerkman , Zhenhuan Yuan
IPC分类号： H02P9/04 , G05D3/12
CPC分类号： H02P9/105 , H02J3/386 , H02J3/50 , H02M5/4585 , H02P9/007 , H02P2101/15
摘要： The present techniques include methods and systems for operating a wind power system to maintain a lifespan of the rotor side converter. In some embodiments, the current of the rotor side converter may be minimized to reduce the stress and/or junction temperature variation in the switching transistors and bond wires of the converter. More specifically, embodiments involve using a minimal current in the rotor side converter based on the rotor side and grid side reactive powers. If the grid side reactive power is greater than a maximum grid side reactive power, the grid side reactive power may be reduced. Further, if the total reactive power does not meet the grid reactive power requirements, the minimal current in the rotor side converter may be adjusted such that the system may sufficiently power the grid.
摘要翻译：本技术包括用于操作风力发电系统以维持转子侧转换器的寿命的方法和系统。在一些实施例中，转子侧转换器的电流可以最小化，以减小转换器的开关晶体管和接合线中的应力和/或结温变化。更具体地，实施例涉及在转子侧转换器中基于转子侧和电网侧无功功率使用最小电流。如果电网侧无功功率大于最大电网侧的无功功率，则电网侧的无功功率可能会降低。此外，如果总无功功率不满足电网无功功率要求，则可以调节转子侧转换器中的最小电流，使得系统可以对电网充分供电。

5. 发明申请

US20110309875A1 CONVERTER LIFETIME IMPROVEMENT METHOD FOR DOUBLY FED INDUCTION GENERATOR 有权
标题翻译：双极电感诱导发生器的转换器寿命改进方法
公开(公告)号：US20110309875A1
公开(公告)日：2011-12-22
申请号：US12818895
申请日：2010-06-18
申请人： Lixiang Wei , Russel J. Kerkman , Richard A. Lukaszewski , Haihui Lu , Zhenhuan Yuan
发明人： Lixiang Wei , Russel J. Kerkman , Richard A. Lukaszewski , Haihui Lu , Zhenhuan Yuan
IPC分类号： H03K17/60
CPC分类号： H02M7/537 , G01B3/52 , G05F1/67 , H02M1/32 , H02P9/007
摘要： The present techniques include methods and systems for operating converter to maintain a lifespan of the converter. In some embodiments, the operating frequency of the converter may be increased such that stress may be reduced on the bond wires of the converter. More specifically, embodiments involve calculating the aging parameters for certain operating conditions of the converter operating in a maximum power point tracking (MPPT) mode and determining whether the MPPT operation results in aging the converter to a point which reduces the converter lifespan below a desired lifespan. If the MPPT operation reduces the converter lifespan below the desired lifespan, the frequency of the converter may be increased such that the converter may be controlled to operate at a percentage of MPPT. Thus, in some embodiments, power output may be optimized with respect to maintaining a desired lifespan of the converter.
摘要翻译：本技术包括用于操作转换器以保持转换器寿命的方法和系统。在一些实施例中，可以增加转换器的工作频率，使得可以在转换器的接合线上减小应力。更具体地，实施例涉及为以最大功率点跟踪（MPPT）模式操作的转换器的某些操作条件计算老化参数，并且确定MPPT操作是否导致转换器老化到将转换器寿命降低到期望寿命以下的点。如果MPPT操作将转换器寿命降低到期望的寿命以下，则可以增加转换器的频率，使得可以将转换器控制为以MPPT的百分比进行操作。因此，在一些实施例中，可以相对于维持转换器的期望寿命来优化功率输出。

6. 发明申请

US20110295437A1 WIND POWER CONVERTER SYSTEM WITH GRID SIDE REACTIVE POWER CONTROL 有权
标题翻译：风力电力转换器系统，具有三相无功功率控制
公开(公告)号：US20110295437A1
公开(公告)日：2011-12-01
申请号：US12789285
申请日：2010-05-27
申请人： Haihui Lu , Lixiang Wei , Richard A. Lukaszewski , Russel J. Kerkman , Zhenhuan Yuan
发明人： Haihui Lu , Lixiang Wei , Richard A. Lukaszewski , Russel J. Kerkman , Zhenhuan Yuan
IPC分类号： H02P9/04 , G06F1/28
CPC分类号： H02P9/105 , H02J3/386 , H02J3/50 , H02M5/4585 , H02P9/007 , H02P2101/15
摘要： The present techniques include methods and systems for operating a wind power system to maintain a lifespan of the rotor side converter. In some embodiments, the current of the rotor side converter may be minimized to reduce the stress and/or junction temperature variation in the switching transistors and bond wires of the converter. More specifically, embodiments involve using a minimal current in the rotor side converter based on the rotor side and grid side reactive powers. If the grid side reactive power is greater than a maximum grid side reactive power, the grid side reactive power may be reduced. Further, if the total reactive power does not meet the grid reactive power requirements, the minimal current in the rotor side converter may be adjusted such that the system may sufficiently power the grid.
摘要翻译：本技术包括用于操作风力发电系统以维持转子侧转换器的寿命的方法和系统。在一些实施例中，转子侧转换器的电流可以最小化，以减小转换器的开关晶体管和接合线中的应力和/或结温变化。更具体地，实施例涉及在转子侧转换器中基于转子侧和电网侧无功功率使用最小电流。如果电网侧无功功率大于最大电网侧的无功功率，则电网侧的无功功率可能会降低。此外，如果总无功功率不满足电网无功功率要求，则可以调节转子侧转换器中的最小电流，使得系统可以对电网充分供电。

7. 发明授权

US08964427B2 Adaptive online filter for DC offset elimination 有权
标题翻译：自适应在线滤波器，用于直流偏移消除
公开(公告)号：US08964427B2
公开(公告)日：2015-02-24
申请号：US13537993
申请日：2012-06-29
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel
IPC分类号： H02M1/12 , H02M1/14
CPC分类号： H03H11/04 , G01R25/00 , H02M1/4233 , H03F1/565 , H03H7/38 , Y02B70/126
摘要： A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
摘要翻译：具有PLL的相位角检测器，功率转换器和用于减少输入信号中的偏移的方法，其中自适应偏移处理器从输入信号中选择性地去除DC偏移分量，以产生包括基频分量的修正信号，去除DC偏移分量的输入信号的高阶谐波，并且PLL根据修改的信号至少部分地提供相位角信号。

8. 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。

9. 发明申请

US20150153397A1 IMPEDANCE DETECTOR APPARATUS AND METHOD 有权
标题翻译：阻抗检测器装置和方法
公开(公告)号：US20150153397A1
公开(公告)日：2015-06-04
申请号：US14095169
申请日：2013-12-03
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Shiv Gupta , Prathamesh Ramesh Vadhavkar
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Shiv Gupta , Prathamesh Ramesh Vadhavkar
IPC分类号： G01R27/02 , G01R27/08
CPC分类号： G01R27/02 , G01R31/028 , G01R31/42
摘要： Impedance detection methods and systems are presented for automatic computation of an electrical component impedance value at one or more specific frequencies of interest using quadrature voltage and current values generated by quadrature tracking filters based on sensed or measured voltage and current signals or values and a base frequency input.
摘要翻译：提出了阻抗检测方法和系统，用于使用基于感测或测量的电压和电流信号或值的正交跟踪滤波器产生的正交电压和电流值自动计算感兴趣的一个或多个特定频率处的电气部件阻抗值，输入。

10. 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。

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