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公开(公告)号：US07928780B1
公开(公告)日：2011-04-19
申请号：US12569119
申请日：2009-09-29
摘要： A phase-locked loop circuit comprises a phase error detector for receiving a multi-phase reference signal and a synchronized phase signal of the phase-locked-loop circuit, and for performing a rotational transformation to convert the multi-phase reference signal into two-phase quantities at a synchronous rotation d-q reference frame. A monotonic transfer module receives the two-phase quantities, and generates a monotonic phase error signal which is monotonic when a phase difference between the multi-phase reference signal and the synchronized phase signal ranges from −180 degrees to 180 degrees. A regulator receives the monotonic phase error signal, and generates a synchronized rotation frequency. An integrator receives the synchronized rotation frequency, and generates the synchronized phase signal.
摘要翻译： 锁相环电路包括用于接收锁相环电路的多相参考信号和同步相位信号的相位误差检测器，并且用于执行旋转变换以将多相参考信号转换为二相参考信号， 同步旋转dq参考系的相位量。 单调传递模块接收两相量，并且当多相参考信号和同步相位信号之间的相位差范围从-180度到180度时，产生单调的单调相位误差信号。 调节器接收单调相位误差信号，并产生同步旋转频率。 积分器接收同步旋转频率，并产生同步相位信号。
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公开(公告)号：US20110075456A1
公开(公告)日：2011-03-31
申请号：US12569160
申请日：2009-09-29
CPC分类号： H02M7/48 , H02J3/40 , H02M2007/53876
摘要： A power distribution system comprises a power conversion module for performing power conversion between a DC voltage at a DC side and an AC power at an AC side, and a conversion control system. The AC side of the power conversion module is electrically coupled to a grid. The conversion control system includes a phase-locked-loop circuit for receiving a multi-phase reference signal of a grid voltage and for generating a synchronized signal, a regulator for receiving reference commands, a two-phase grid feedback signal, and the synchronized signal and for generating a control signal for the power conversion module, and a phase compensation circuit for receiving the synchronized signal and the multi-phase reference signal of the grid voltage, for obtaining a phase displacement signal, and for generating a phase compensation signal for compensating the reference commands or for compensating the synchronized signal when the phase displacement signal exceeds a threshold value.
摘要翻译： 配电系统包括用于在直流侧的DC电压和AC侧的AC电力之间进行电力转换的电力转换模块和转换控制系统。 电力转换模块的AC侧电耦合到电网。 转换控制系统包括用于接收电网电压的多相参考信号并用于产生同步信号的锁相环电路，用于接收参考命令的调节器，两相电网反馈信号和同步信号 并且用于产生用于电力转换模块的控制信号，以及用于接收电网电压的同步信号和多相参考信号的相位补偿电路，以获得相位位移信号，并产生用于补偿的相位补偿信号 参考命令或用于当相位位移信号超过阈值时补偿同步信号。
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公开(公告)号：US20130134710A1
公开(公告)日：2013-05-30
申请号：US13483776
申请日：2012-05-30
申请人： Xiaoming Yuan , Haiqing Weng , Zhuohui Tan , Yunfeng Liu , Wenqiang Yang , Pengcheng Zhu
发明人： Xiaoming Yuan , Haiqing Weng , Zhuohui Tan , Yunfeng Liu , Wenqiang Yang , Pengcheng Zhu
CPC分类号： H02M5/458 , F03D9/25 , F03D9/257 , H02J3/383 , H02J3/386 , H02M1/00 , H02M1/12 , H02M7/487 , H02M2001/0048 , H02P9/02 , Y02B70/1491 , Y02E10/563 , Y02E10/763
摘要： A system for power conversion includes a power converter having switching elements, a detector, and a controller is provided. The detector detects a parameter and provides electrical signals indicative of the parameter. The controller receives the electrical signals transmitted from the detector, and sends commands to instruct the power converter to perform power conversion by operating the switching elements in accordance with switching signals at a different frequency in response to a detection of the system condition. A method for operating the system is also provided.
摘要翻译： 一种用于电力转换的系统包括具有开关元件的功率转换器，检测器和控制器。 检测器检测参数并提供指示参数的电信号。 控制器接收从检测器发送的电信号，并且响应于系统状况的检测，发送命令以指示功率转换器根据不同频率的切换信号操作开关元件来执行功率转换。 还提供了一种用于操作系统的方法。
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4.发明授权Apparatus, method and computer program product for tracking information in an electric grid 有权用于跟踪电网信息的装置，方法和计算机程序产品公开(公告)号：US07940131B2
公开(公告)日：2011-05-10
申请号：US12196794
申请日：2008-08-22
申请人： Haiqing Weng , John D. D'Atre , Robert A. Seymour , Allen M. Ritter , Xiaoming Yuan , Renchang Dai , Robert W. Delmerico
发明人： Haiqing Weng , John D. D'Atre , Robert A. Seymour , Allen M. Ritter , Xiaoming Yuan , Renchang Dai , Robert W. Delmerico
IPC分类号： G05F1/70
CPC分类号： G01R19/2513 , H04B2203/5466
摘要： An apparatus for rapidly tracking fundamental frequency information in the signal of an electric grid is a cross-coupled phase-lock loop filter (CCPLL) that includes the use of a phase-lock-loop (PLL) apparatus having a plurality individual filters, wherein an input for a first filter in the plurality of individual filters comprises the signal of the electric grid and an output signal from at least a second filter in the plurality of individual filters. A method for using the CCPLL includes applying a signal to the CCPLL and monitoring the output of the CCPLL. Use of the CCPLL may be accomplished or modeled via computer instructions stored on machine readable media.
摘要翻译： 一种用于在电网信号中快速跟踪基频信息的装置是交叉耦合锁相环路滤波器（CCPLL），其包括使用具有多个单独滤波器的锁相环（PLL）装置，其中 多个单独滤波器中的第一滤波器的输入包括电网的信号和来自多个单独滤波器中的至少第二滤波器的输出信号。 使用CCPLL的方法包括将信号应用于CCPLL并监视CCPLL的输出。 CCPLL的使用可以通过存储在机器可读介质上的计算机指令来实现或建模。
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公开(公告)号：US07852643B2
公开(公告)日：2010-12-14
申请号：US11823714
申请日：2007-06-27
申请人： Richard S. Zhang , Changyong Wang , Zhuohui Tan , Haiqing Weng
发明人： Richard S. Zhang , Changyong Wang , Zhuohui Tan , Haiqing Weng
IPC分类号： H02J1/10
CPC分类号： H02M5/4585 , H02M1/32 , H02M7/17 , H02M7/493 , H02M2001/123
摘要： A system and method for controlling cross current in an interleaved power converter system having a plurality of converter threads coupled in parallel includes collecting a feedback current from each thread and obtaining a normal current and a differential mode current for each thread, based on its respective feedback current. The normal current of each thread is regulated to a commanded thread normal current value via a respective normal current control loop based on d-q rotating frame parameters. A differential mode cross current of each thread is regulated to zero via a respective differential mode cross current control loop based on d-q rotating frame parameters; while a differential mode cross current DC offset of each thread is regulated to zero via a respective differential mode cross current control loop based on stationary frame parameters.
摘要翻译： 一种用于控制具有并联耦合的多个转换器线程的交错电力转换器系统中的交叉电流的系统和方法包括：收集来自每个线程的反馈电流，并且基于其各自的反馈获得每个线程的正常电流和差模电流 当前。 基于d-q旋转帧参数，通过相应的正常电流控制回路将每个线程的正常电流调节到指令线程的正常电流值。 通过基于d-q旋转帧参数的相应的差模交叉电流控制回路将每个线程的差模交叉电流调节为零; 而每个线程的差模交叉电流DC偏移通过基于固定帧参数的相应差模交叉电流控制回路调节为零。
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公开(公告)号：US07804184B2
公开(公告)日：2010-09-28
申请号：US12358327
申请日：2009-01-23
CPC分类号： H02J3/386 , Y02E10/725 , Y02E10/763
摘要： A system for controlling a grid connected power generating system is provided. The system includes a wind turbine, a converter, a first controller and a second controller. The wind turbine supplies electrical power to a power grid and the converter couples the wind turbine to the power grid. The first controller calculates voltage commands to emulate a phasor back electromotive force behind an inductance. The controller further generates converter switching commands from the voltage commands. The voltage commands include a voltage magnitude reference and an internal frequency reference calculated from a power imbalance between an active power reference and the electrical power. The second controller is used to limit a converter current.
摘要翻译： 提供一种用于控制并网发电系统的系统。 该系统包括风力涡轮机，转换器，第一控制器和第二控制器。 风力涡轮机向电网提供电力，并且转换器将风力涡轮机耦合到电网。 第一控制器计算电压指令以仿真电感后面的相量反电动势。 控制器还从电压指令产生转换器切换命令。 电压指令包括从有功功率基准和电功率之间的功率不平衡计算出的电压幅度参考和内部频率参考。 第二个控制器用于限制转换器电流。
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公开(公告)号：US07253537B2
公开(公告)日：2007-08-07
申请号：US11297775
申请日：2005-12-08
IPC分类号： H02P9/48
CPC分类号： H02P9/007 , H02P9/006 , H02P9/10 , H02P2101/15
摘要： A protection system and a protection method are provided for protecting a double fed induction generator and a gearbox during a grid fault. The protection system includes a plurality of controlled impedance devices. Each of the controlled impedance devices is coupled between a respective phase of a stator winding of the double fed induction generator and a respective phase of a grid side converter. The protection system also includes a controller configured for coupling and decoupling impedance in one or more of the plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current.
摘要翻译： 提供了一种保护系统和保护方法，用于在电网故障期间保护双馈感应发电机和变速箱。 保护系统包括多个受控阻抗装置。 每个受控阻抗装置耦合在双馈感应发电机的定子绕组的相位和电网侧转换器的相应相位之间。 保护系统还包括控制器，其被配置为响应于公用电网电压和公用电网电流中的至少一个的变化而耦合和去耦合多个受控阻抗设备中的一个或多个中的阻抗。
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公开(公告)号：US20070132248A1
公开(公告)日：2007-06-14
申请号：US11297775
申请日：2005-12-08
申请人： Haiqing Weng , Robert Delmerico , Xiaoming Yuan , Changyong Wang
发明人： Haiqing Weng , Robert Delmerico , Xiaoming Yuan , Changyong Wang
IPC分类号： H02P9/04
CPC分类号： H02P9/007 , H02P9/006 , H02P9/10 , H02P2101/15
摘要： A protection system and a protection method are provided for protecting a double fed induction generator and a gearbox during a grid fault. The protection system includes a plurality of controlled impedance devices. Each of the controlled impedance devices is coupled between a respective phase of a stator winding of the double fed induction generator and a respective phase of a grid side converter. The protection system also includes a controller configured for coupling and decoupling impedance in one or more of the plurality of controlled impedance devices in response to changes in at least one of a utility grid voltage and a utility grid current.
摘要翻译： 提供了一种保护系统和保护方法，用于在电网故障期间保护双馈感应发电机和变速箱。 保护系统包括多个受控阻抗装置。 每个受控阻抗装置耦合在双馈感应发电机的定子绕组的相位和电网侧转换器的相应相位之间。 保护系统还包括控制器，其被配置为响应于公用电网电压和公用电网电流中的至少一个的变化而耦合和去耦合多个受控阻抗设备中的一个或多个中的阻抗。
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公开(公告)号：US20060227578A1
公开(公告)日：2006-10-12
申请号：US11095227
申请日：2005-03-30
申请人： Rajib Datta , Kunlun Chen , Haiqing Weng , Ravisekhar Raju
发明人： Rajib Datta , Kunlun Chen , Haiqing Weng , Ravisekhar Raju
IPC分类号： H02J1/10
CPC分类号： H02M7/49
摘要： A power converter system for supplying an output voltage is provided. The power converter system is adapted to operate in a normal mode and a fault mode. The system comprises a plurality of bridges and a plurality of transformers. The system further comprises a plurality of dc link capacitors, each coupled across a corresponding bridge. The system also includes a controller adapted for, during the normal mode, switching each bridge with a respective normal phase shift. During the fault mode, the controller is adapted for switching each of the remaining ones of the bridges with a respective adjusted phase shift to generate the output voltage. During the fault mode, at least one of the plurality of bridges is bypassed.
摘要翻译： 提供了用于提供输出电压的功率转换器系统。 电源转换器系统适用于正常模式和故障模式。 该系统包括多个桥和多个变压器。 该系统还包括多个直流链路电容器，每个直流链路电容器跨越相应的桥接器耦合。 该系统还包括适于在正常模式期间用相应的正相移切换每个桥的控制器。 在故障模式期间，控制器适于用相应调整的相移来切换桥接中的每一个，以产生输出电压。 在故障模式期间，绕过多个桥中的至少一个。
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公开(公告)号：US08014181B2
公开(公告)日：2011-09-06
申请号：US12569160
申请日：2009-09-29
IPC分类号： H02M7/5383 , H03L7/00
CPC分类号： H02M7/48 , H02J3/40 , H02M2007/53876
摘要： A power distribution system comprises a power conversion module for performing power conversion between a DC voltage at a DC side and an AC power at an AC side, and a conversion control system. The AC side of the power conversion module is electrically coupled to a grid. The conversion control system includes a phase-locked-loop circuit for receiving a multi-phase reference signal of a grid voltage and for generating a synchronized signal, a regulator for receiving reference commands, a two-phase grid feedback signal, and the synchronized signal and for generating a control signal for the power conversion module, and a phase compensation circuit for receiving the synchronized signal and the multi-phase reference signal of the grid voltage, for obtaining a phase displacement signal, and for generating a phase compensation signal for compensating the reference commands or for compensating the synchronized signal when the phase displacement signal exceeds a threshold value.
摘要翻译： 配电系统包括用于在直流侧的DC电压和AC侧的AC电力之间进行电力转换的电力转换模块和转换控制系统。 电力转换模块的AC侧电耦合到电网。 转换控制系统包括用于接收电网电压的多相参考信号并用于产生同步信号的锁相环电路，用于接收参考命令的调节器，两相电网反馈信号和同步信号 并且用于产生用于电力转换模块的控制信号，以及用于接收电网电压的同步信号和多相参考信号的相位补偿电路，以获得相位位移信号，并产生用于补偿的相位补偿信号 参考命令或用于当相位位移信号超过阈值时补偿同步信号。
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