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：US20140362613A1

公开(公告)日：2014-12-11

申请号：US14302196

申请日：2014-06-11

Applicant: ABB Research Ltd

Inventor： Ki-Bum PARK ,  Francisco CANALES ,  Sami PETTERSSON

IPC: H02M1/34 ,  H02M3/335

CPC classification number: H02M1/34 ,  H02M3/335 ,  H02M3/33523 ,  H02M2001/346 ,  Y02B70/1491

Abstract: The present disclosure relates to an LC snubber circuit for a switching converter, wherein the switching converter includes an inductor and a switching device connected in series. The LC snubber circuit can include a first snubber diode, a snubber capacitor, a second snubber diode, and a snubber transformer having a primary winding and a secondary winding. The secondary winding of the snubber transformer is connected to an output of the switching converter.

Abstract translation: 本公开涉及一种用于开关转换器的LC缓冲电路，其中开关转换器包括串联连接的电感器和开关装置。 LC缓冲电路可以包括第一缓冲二极管，缓冲电容器，第二缓冲二极管和具有初级绕组和次级绕组的缓冲变压器。 缓冲变压器的次级绕组连接到开关转换器的输出端。

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：US20140369093A1

公开(公告)日：2014-12-18

申请号：US14306807

申请日：2014-06-17

Applicant: ABB Research Ltd

Inventor： Ki-Bum PARK ,  Francisco CANALES ,  Sami PETTERSSON

IPC: H02M1/34

CPC classification number: H02M1/34 ,  H02M3/335 ,  H02M2001/344 ,  H02M2001/348

Abstract: Exemplary embodiments provide a method and an adaptive RCD snubber circuit for a switching converter having a series-connection of a main inductor and a main switching device. A voltage stress of the main switching device is sensed, and the sensed voltage stress is controlled to a reference level by controlling a snubber capacitor voltage, wherein the snubber capacitor voltage is controlled by adjusting the snubber resistance of the RCD snubber.

Abstract translation: 示例性实施例提供了一种用于具有主电感器和主开关装置的串联连接的开关转换器的方法和自适应RCD缓冲电路。 感测主开关装置的电压应力，并且通过控制缓冲电容器电压将感测到的电压应力控制到参考电平，其中通过调节RCD缓冲器的缓冲电阻来控制缓冲电容器电压。

公开(公告)号：US20130200715A1

公开(公告)日：2013-08-08

申请号：US13753778

申请日：2013-01-30

Applicant: ABB RESEARCH LTD

Inventor： Sami PETTERSSON ,  Ngai-Man Ho ,  Gerardo Escobar

IPC: H02M7/537

CPC classification number: H02M7/537 ,  H02J3/383 ,  H02M1/12 ,  H02M7/487 ,  H02M7/53871 ,  H02M2001/007 ,  H02M2001/123 ,  Y02E10/563 ,  Y10T307/707

Abstract: A converter assembly includes a DC-DC converter, an inverter, a DC link, an input capacitor, an inductor and a neutral conductor. The DC-DC converter includes at least one DC-DC converter unit. The input capacitor includes an input capacitor unit for each of the at least one DC-DC converter unit, where each of the input capacitor units has a midpoint. The neutral conductor is connected to a neutral point on an output side of the inverter. The inductor includes an inverter side inductor between each output terminal of the inverter means and the neutral point on output side of the inverter. The neutral conductor is connected to the midpoint of each of the input capacitor units.

Abstract translation: A转换器组件包括DC-DC转换器，逆变器，DC链路，输入电容器，电感器和中性导体。 DC-DC转换器包括至少一个DC-DC转换器单元。 输入电容器包括用于至少一个DC-DC转换器单元中的每一个的输入电容器单元，其中每个输入电容器单元具有中点。 中性导体连接到变频器输出侧的中性点。 电感器包括逆变器装置的每个输出端子和逆变器的输出侧的中性点之间的反相器侧电感器。 中性导体连接到每个输入电容器单元的中点。