公开(公告)号：US20170054291A1

公开(公告)日：2017-02-23

申请号：US15344013

申请日：2016-11-04

Applicant: ABB Schweiz AG

Inventor： LI QI ,  Jiuping Pan ,  Yao Chen ,  Guoju Zhang

IPC: H02J1/00 ,  H02H7/26 ,  H02M1/32 ,  H02M3/04 ,  H02M7/04

Abstract: Methods and apparatus for protecting a direct-current (DC) electric power distribution system that includes one or more AC/DC converters and/or one more DC/DC converters, and one or more loads, connected by DC buses. An example method, which is carried out in response to the detection of a fault somewhere in the system, begins with limiting an output current of each of one or more of the converters so that each of the limited converters outputs a limited DC current at or about a corresponding predetermined current level. After the current limiting of the one or more converters has taken place, one or more protection devices in the system are activated, where the activating at least partly depends on the limited DC currents being at or about the predetermined fault current levels.

Abstract translation: 用于保护包括一个或多个AC / DC转换器和/或一个DC / DC转换器的直流（DC）配电系统的方法和装置以及由DC总线连接的一个或多个负载。 响应于系统中某处的故障检测而执行的示例性方法开始于限制一个或多个转换器中的每一个的输出电流，使得每个受限转换器输出有限的直流电流或 关于相应的预定电流水平。 在一个或多个转换器的电流限制已经发生之后，系统中的一个或多个保护装置被激活，其中激活至少部分地取决于处于或围绕预定故障电流电平的有限的DC电流。

公开(公告)号：US09893524B2

公开(公告)日：2018-02-13

申请号：US14374559

申请日：2012-12-20

Applicant: ABB Schweiz AG

Inventor： Yao Chen ,  Guoju Zhang ,  Charles Sao

IPC: G05D3/12 ,  H02J3/18 ,  G05B15/02 ,  H02P9/14 ,  G05F1/70 ,  H02P9/30

CPC classification number: H02J3/1821 ,  G05B15/02 ,  G05F1/70 ,  H02J3/18 ,  H02J3/1814 ,  H02P9/14 ,  H02P9/30 ,  Y02E40/12 ,  Y02E40/18

Abstract: The present invention provides coordinated control methods of generator and SVC for improving power plant active power throughput and controller thereof. The method comprises: measuring the required input parameters for the generator and SVC control; judging the system topology and the control mode of SVC to determine the operation mode; and calculating the control reference based on the operation mode to control the generator and/or SVC. The proposed methods and coordinated controllers enable the SVC to share the required reactive power output of the power plant, convert the generator into “unity-power-factor-generator”, and therefore extend the active power output capability of the power plant.

公开(公告)号：US09502899B2

公开(公告)日：2016-11-22

申请号：US14413084

申请日：2013-04-28

Applicant: ABB Schweiz AG

Inventor： Yao Chen ,  Guoju Zhang ,  Charles Sao

IPC: G05F1/70 ,  H02J3/18 ,  G05B15/02 ,  H02P9/14 ,  H02P9/30

CPC classification number: H02J3/1821 ,  G05B15/02 ,  G05F1/70 ,  H02J3/18 ,  H02J3/1814 ,  H02P9/14 ,  H02P9/30 ,  Y02E40/12 ,  Y02E40/18

Abstract: Method and apparatus for controlling at least one generator and a Static Var Compensator (SVC) to improve dynamic performance of the power plant are provided. The method comprises: obtaining the required input parameters for control of said generators and SVC; determining a control mode of the generators and the SVC; calculating the control references based on the input parameters and the control mode of the generators and the SVC; and controlling the generators and/or the SVC according to the control references. The invention also relates to a corresponding apparatus which can implement the method of the invention.

Abstract translation: 提供了用于控制至少一个发电机和静态无功补偿器（SVC）以改善发电厂的动态性能的方法和装置。 该方法包括：获得用于控制所述发电机和SVC的所需输入参数; 确定发电机和SVC的控制模式; 根据输入参数和发电机和SVC的控制方式计算控制参考值; 以及根据控制参考来控制发电机和/或SVC。 本发明还涉及可实现本发明方法的相应设备。

公开(公告)号：US10693293B2

公开(公告)日：2020-06-23

申请号：US15344013

申请日：2016-11-04

Applicant: ABB Schweiz AG

Inventor： Li Qi ,  Jiuping Pan ,  Yao Chen ,  Guoju Zhang

IPC: H02J1/00 ,  H02H7/26 ,  H02M1/32 ,  H02H3/02 ,  H02H3/06 ,  H02H9/02 ,  H02M3/04 ,  H02M7/04

Abstract: Methods and apparatus for protecting a direct-current (DC) electric power distribution system that includes one or more AC/DC converters and/or one more DC/DC converters, and one or more loads, connected by DC buses. An example method, which is carried out in response to the detection of a fault somewhere in the system, begins with limiting an output current of each of one or more of the converters so that each of the limited converters outputs a limited DC current at or about a corresponding predetermined current level. After the current limiting of the one or more converters has taken place, one or more protection devices in the system are activated, where the activating at least partly depends on the limited DC currents being at or about the predetermined fault current levels.