公开(公告)号：US20130110434A1

公开(公告)日：2013-05-02

申请号：US13666649

申请日：2012-11-01

Applicant: ABB Research Ltd

Inventor： Ngai-Man HO ,  Gerardo ESCOBAR ,  Sami PETTERSSON

IPC: G06F19/00 ,  G01R19/00

CPC classification number: H03L7/08 ,  G01R19/2513 ,  G01R23/15 ,  H03L2207/50

Abstract: A method and arrangement for detecting a frequency of a measured three-phase voltage. The method includes measuring a three-phase voltage, forming a discrete model for a periodic signal, the discrete model including the three-phase voltage and a difference between positive and negative voltage components of the three-phase voltage, forming a discrete detector based on the discrete model, detecting a fundamental wave component of the voltage and the difference between the positive and negative voltage components of the three-phase voltage from an error between the measured voltage and detected fundamental wave component of the voltage by using the discrete detector and a sampling time together with a detected frequency of the measured voltage. The detected frequency is detected from a detected difference between positive and negative voltage components of the measured voltage and from an error between the measured voltage and the detected fundamental wave component of the voltage.

Abstract translation: 一种用于检测测量的三相电压的频率的方法和装置。 该方法包括测量三相电压，形成周期信号的离散模型，包括三相电压的离散模型和三相电压的正负电压分量之间的差异，形成基于 离散模型，通过使用离散检测器从电压的测量电压和检测到的基波分量之间的误差检测电压的基波分量和三相电压的正电压分量和负电压分量之间的差异，以及 采样时间以及测得的电压的检测频率。 从检测到的电压的正电压分量和负电压分量之间的检测到的差异以及从测量的电压和检测到的电压的基波分量之间的误差来检测检测到的频率。

公开(公告)号：US20130329471A1

公开(公告)日：2013-12-12

申请号：US13912398

申请日：2013-06-07

Applicant: ABB Research Ltd

Inventor： Gerardo ESCOBAR ,  Sami PETTERSSON ,  Ngai-Man HO

IPC: H02M7/42

CPC classification number: H02M7/42 ,  H02J3/383 ,  H02M1/126 ,  H02M7/487 ,  H02M2001/0003 ,  H02M2001/123 ,  Y02E10/563

Abstract: An exemplary method and an apparatus implementing the method for an arrangement having a three-phase, multi-level inverter, an output LCL-filter connecting the inverter to a grid, and a virtual-ground connection between the LCL-filter and the neutral point of the DC-link. The method includes determining a zero-sequence component of an LCL-filter inverter-side current, calculating a zero-sequence damping and balancing voltage term based on the LCL-filter inverter-side current zero-sequence component and voltages over the two halves of the DC-link, and adding the zero-sequence damping and voltage balancing term to the output voltage reference.

Abstract translation: 实现具有三相多电平逆变器，将逆变器连接到电网的输出LCL滤波器和LCL滤波器与中性点之间的虚拟接地连接的装置的示例性方法和装置 的直流链路。 该方法包括：确定LCL滤波器逆变器侧电流的零序分量，基于LCL滤波器逆变器侧电流零序分量计算零序阻尼和平衡电压项， DC链路，并将零序阻尼和电压平衡项添加到输出电压基准。

公开(公告)号：US20140241016A1

公开(公告)日：2014-08-28

申请号：US14186259

申请日：2014-02-21

Applicant: ABB Research Ltd

Inventor： Ngai-Man HO ,  Gerardo ESCOBAR ,  Francisco CANALES

IPC: H02M7/537

CPC classification number: H02M7/49 ,  H02M3/335 ,  H02M7/487 ,  H02M7/493 ,  H03B1/00

Abstract: Exemplary embodiments are directed to methods and systems for producing a three-phase current to a three-phase output. Switching converters are used to generate a positive current, a negative current, and an intermediate current. The system is configured such that the produced positive current follows a path of a highest phase of a sinusoidal three-phase signal at a given time, the produced negative current follows a path of a lowest phase of the three-phase signal at the given time, and the produced intermediate current follows a path of a phase of the three-phase signal between the highest and the lowest phase at the given time. The produced currents are switched to each phase conductor of the three-phase output in sequence so that phase currents of the three-phase current are formed in the output conductors.

Abstract translation: 示例性实施例涉及用于产生三相电流到三相输出的方法和系统。 开关转换器用于产生正电流，负电流和中间电流。 该系统被配置为使得所产生的正电流在给定时间沿着正弦三相信号的最高相位的路径，所产生的负电流遵循在给定时间的三相信号的最低相位的路径 并且所产生的中间电流遵循在给定时间在最高和最低相之间的三相信号的相位的路径。 所产生的电流依次切换到三相输出的每个相导体，使得在输出导体中形成三相电流的相电流。

公开(公告)号：US20130114302A1

公开(公告)日：2013-05-09

申请号：US13668797

申请日：2012-11-05

Applicant: ABB Research Ltd

Inventor： Gerardo ESCOBAR ,  Sami PETTERSSON ,  Leonardo-Augusto SERPA ,  Ngai-Man HO ,  Antonio COCCIA ,  Alexandre OUDALOV ,  Adrian TIMBUS

IPC: G01R31/40 ,  H02M7/42

CPC classification number: H02J3/38 ,  H02J2003/388

Abstract: An exemplary method and apparatus for detecting islanding conditions of a distributed grid are disclosed, wherein transfer of power through a power electrical unit is controlled on the basis of a control reference. The apparatus includes a first stage and a second stage performing a respective portion of the method. The first stage injects a reactive component to the control reference, and, for at least one electrical quantity of the grid, determines a change in the quantity induced by the injected component, and determines, on the basis of the change in the electrical quantity, whether to move to the second stage of the method. The second stage, for at least one electrical quantity of the grid, determines a value of the electrical quantity, forms a positive feedback term using at the determined value adding a positive feedback term to the control reference, determines a change in an electrical quantity induced by the feedback term, and determines islanding condition on the basis of the change in the quantity induced by the feedback term.

Abstract translation: 公开了一种用于检测分布式电网的孤岛状况的示例性方法和装置，其中基于控制参考来控制通过电力单元的电力传输。 该装置包括执行该方法的相应部分的第一阶段和第二阶段。 第一阶段向控制基准注入无功分量，并且对于电网的至少一个电量来确定由所注入的分量引起的量的变化，并且基于电量的变化， 是否移动到第二阶段的方法。 第二阶段，对于电网的至少一个电量，确定电量的值，以确定的值形成正反馈项，将正反馈项添加到控制参考，确定引起的电量的变化 根据反馈项，根据反馈项引起的数量变化确定孤岛状态。

公开(公告)号：US20130229839A1

公开(公告)日：2013-09-05

申请号：US13773174

申请日：2013-02-21

Applicant: ABB RESEARCH LTD.

Inventor： Gerardo ESCOBAR ,  Ngai-Man Ho ,  Sami Pettersson

IPC: H02M1/12

CPC classification number: H02M1/12 ,  H02J3/385 ,  H02M1/126 ,  H02M3/1582 ,  H02M7/539 ,  H02M2001/007 ,  Y02E10/58

Abstract: A method and an apparatus for controlling a grid-connected converter which includes a boost converter, a buck converter, and a current source inverter having an output CL filter. An input of the buck converter input is connected to an output of the boost converter, and an input of the current source inverter is connected to an output of the buck converter. The method includes controlling a boost converter input voltage, controlling a boost converter output voltage through control of a buck converter output voltage, and controlling the current source inverter to produce an AC current from the buck converter output voltage. The apparatus implements the method.

Abstract translation: 一种用于控制并网转换器的方法和装置，其包括升压转换器，降压转换器和具有输出CL滤波器的电流源逆变器。 降压转换器输入的输入端连接到升压转换器的输出，电流源逆变器的输入端连接到降压转换器的输出端。 该方法包括控制升压转换器输入电压，通过降压转换器输出电压的控制来控制升压转换器输出电压，以及控制电流源逆变器从降压转换器输出电压产生交流电流。 该装置实现该方法。