公开(公告)号：US09735581B2

公开(公告)日：2017-08-15

申请号：US14253590

申请日：2014-04-15

Applicant: ABB Technology AG

Inventor： Jiuping Pan ,  Debrup Das ,  Xiaoming Feng

IPC: H02J3/38 ,  F03D9/00 ,  H02J3/34 ,  F03D9/25

CPC classification number: H02J3/38 ,  F03D9/257 ,  H02J3/34 ,  H02J3/386 ,  Y02E10/725 ,  Y02E10/727 ,  Y02E10/763 ,  Y10T307/664

Abstract: According to one aspect of the teachings herein, various feeder connection arrangements and architectures are disclosed, for collecting electricity from wind turbines in an offshore collection grid that operates at a fixed low frequency, e.g., at one third of the targeted utility grid frequency. Embodiments herein detail various feeder arrangements, such as the use of parallel feeder connections and cluster-based feeder arrangements where a centralized substation includes a common step-up transformer for outputting electricity at a stepped-up voltage, for low-frequency transmission to onshore equipment. Further aspects relate to advantageous generation arrangements, e.g., tower-based arrangements, for converting wind power into electrical power using, for example, medium-speed or high-speed gearboxes driving generators having a rated electrical frequency for full-power output in a range from about 50 Hz to about 150 Hz, with subsequent conversion to the fixed low frequency for off-shore collection.

公开(公告)号：US20150066402A1

公开(公告)日：2015-03-05

申请号：US14017597

申请日：2013-09-04

Applicant: ABB Technology AG

Inventor： Xiaoming Feng ,  Vaibhav Donde ,  Ernst Scholtz

IPC: G01R21/133

CPC classification number: G01R19/2513 ,  H02J3/36 ,  Y02E60/60 ,  Y02E60/74 ,  Y04S10/30

Abstract: A power system grid is decomposed into several parts and decomposed state estimation steps are executed separately, on each part, using coordinated feedback regarding a boundary state. The achieved solution is the same that would be achieved with a simultaneous state estimation approach. With the disclosed approach, the state estimation problem can be distributed among decomposed estimation operations for each subsystem and a coordinating operation that yields the complete state estimate. The approach is particularly suited for estimating the state of power systems that are naturally decomposed into separate subsystems, such as separate AC and HVDC systems, and/or into separate transmission and distribution systems.

Abstract translation: 电力系统网格分解为几个部分，分解状态估计步骤分别执行，每个部分使用关于边界状态的协调反馈。 所实现的解决方案与通过同时状态估计方法实现的解决方案相同。 利用所公开的方法，可以在每个子系统的分解估计操作之间分配状态估计问题，以及产生完整状态估计的协调操作。 该方法特别适用于估计自然分解成单独的子系统的电力系统的状态，例如单独的AC和HVDC系统，和/或分成单独的传输和分配系统。

公开(公告)号：US09705336B2

公开(公告)日：2017-07-11

申请号：US14080523

申请日：2013-11-14

Applicant: ABB Technology AG

Inventor： Xiaoming Feng ,  Will Briggs ,  Mani Subramanian ,  Ernst Scholtz

IPC: G06Q50/06 ,  H02J4/00 ,  G06Q10/06 ,  H02J3/00

CPC classification number: H02J4/00 ,  G06Q10/063 ,  G06Q50/06 ,  H02J2003/007

Abstract: The teachings herein disclose an advantageous method and apparatus for performing Security Constrained Economic Dispatch (SCED) for a hybrid power system that includes one or more AC grids interconnected with one or more multi-terminal High Voltage DC (HVDC) grids. The teachings include optimizing a non-linear objective function, subject to a set of constraints that include AC and DC grid constraints, for determining the SCED solution using successive linear approximation. The linear programming model used in the linear approximations is advantageously augmented with a DC grid portion in a manner that accounts for the effects of the DC grid on the AC grid, but which does not require exposing proprietary DC grid modeling details, and which conforms the resultant SCED solution to all applicable AC and DC grid constraints, including AC grid line flow constraints, AC grid power balance constraints, DC grid line flow constraints, and DC grid power balance constraints.

公开(公告)号：US20140265599A1

公开(公告)日：2014-09-18

申请号：US13826762

申请日：2013-03-14

Applicant: ABB Technology AG

Inventor： Xiaoming Feng ,  Juhua Liu ,  Ernst Scholtz

IPC: H02J4/00

CPC classification number: H02J5/00 ,  H02J3/18 ,  Y02E40/30 ,  Y10T307/675

Abstract: Power flow in a hybrid AC-DC power system is analyzed by determining DC power injection variables as a function of AC state information for common coupling buses which connect AC and DC grids. The AC state information includes voltage magnitude and phase angle information for the common coupling buses and buses in the AC grid(s). The DC power injection variables indicate AC power injection into the one or more AC grids at the common coupling buses from the DC grid(s). The AC state information is revised iteratively as a function of the DC power injection variables and the sensitivity of the DC power injection variables to the AC state information, and the DC power injection variables and the sensitivity of the DC power injection variables are revised iteratively as a function of the revised AC state information until the power mismatch is acceptable.

Abstract translation: 通过确定DC功率注入变量作为连接AC和DC网格的公共耦合总线的AC状态信息的函数来分析混合AC-DC电力系统中的功率流。 AC状态信息包括用于公共耦合总线和AC网格中的总线的电压幅度和相位角信息。 直流电源注入变量表示在DC电网的公共耦合总线处AC电力注入到一个或多个AC电网中。 AC状态信息作为DC功率注入变量的函数和DC功率注入变量对AC状态信息的灵敏度进行迭代修改，DC功率注入变量和DC功率注入变量的灵敏度迭代地修改为 修正的AC状态信息的功能，直到功率不匹配是可接受的。

公开(公告)号：US20150066401A1

公开(公告)日：2015-03-05

申请号：US14017448

申请日：2013-09-04

Applicant: ABB Technology AG

Inventor： Vaibhav D. Donde ,  Xiaoming Feng

IPC: G01R21/133

CPC classification number: G01R19/2513 ,  H02J3/36 ,  Y02E60/60 ,  Y02E60/74 ,  Y04S10/30

Abstract: A power system grid is decomposed into several parts and decomposed state estimation steps are executed separately, using Lagrangian relaxation and blockwise Gauss-Seidel solution. The achieved solution is the same that would be achieved with a simultaneous state estimation approach. With the disclosed approach, the state estimation problem can be distributed among decomposed estimation operations for each subsystem, where the decomposed estimation operations coordinate with one another to yield the complete state estimate. The approach is particularly suited for estimating the state of power systems that are naturally decomposed into separate subsystems, such as separate AC and HVDC systems, and/or separate transmission and distribution systems.

Abstract translation: 电力系统网格分解为几个部分，分解状态估计步骤分别执行，使用拉格朗日弛豫和块状高斯塞德解决方案。 所实现的解决方案与通过同时状态估计方法实现的解决方案相同。 利用所公开的方法，可以在每个子系统的分解估计操作之间分布状态估计问题，其中分解的估计操作彼此协调以产生完整的状态估计。 该方法特别适用于估计自然分解为独立子系统的电力系统的状态，例如单独的AC和HVDC系统，和/或单独的传输和分配系统。

公开(公告)号：US09658260B2

公开(公告)日：2017-05-23

申请号：US14017597

申请日：2013-09-04

Applicant: ABB Technology AG

Inventor： Xiaoming Feng ,  Vaibhav Donde ,  Ernst Scholtz

IPC: G01R21/00 ,  G01R19/25 ,  H02J3/36

CPC classification number: G01R19/2513 ,  H02J3/36 ,  Y02E60/60 ,  Y02E60/74 ,  Y04S10/30

Abstract: A power system grid is decomposed into several parts and decomposed state estimation steps are executed separately, on each part, using coordinated feedback regarding a boundary state. The achieved solution is the same that would be achieved with a simultaneous state estimation approach. With the disclosed approach, the state estimation problem can be distributed among decomposed estimation operations for each subsystem and a coordinating operation that yields the complete state estimate. The approach is particularly suited for estimating the state of power systems that are naturally decomposed into separate subsystems, such as separate AC and HVDC systems, and/or into separate transmission and distribution systems.

公开(公告)号：US20150260162A1

公开(公告)日：2015-09-17

申请号：US14253590

申请日：2014-04-15

Applicant: ABB TECHNOLOGY AG

Inventor： Jiuping Pan ,  Debrup Das ,  Xiaoming Feng

IPC: F03D9/00 ,  H02J3/38

CPC classification number: H02J3/38 ,  F03D9/257 ,  H02J3/34 ,  H02J3/386 ,  Y02E10/725 ,  Y02E10/727 ,  Y02E10/763 ,  Y10T307/664

Abstract: According to one aspect of the teachings herein, various feeder connection arrangements and architectures are disclosed, for collecting electricity from wind turbines in an offshore collection grid that operates at a fixed low frequency, e.g., at one third of the targeted utility grid frequency. Embodiments herein detail various feeder arrangements, such as the use of parallel feeder connections and cluster-based feeder arrangements where a centralized substation includes a common step-up transformer for outputting electricity at a stepped-up voltage, for low-frequency transmission to onshore equipment. Further aspects relate to advantageous generation arrangements, e.g., tower-based arrangements, for converting wind power into electrical power using, for example, medium-speed or high-speed gearboxes driving generators having a rated electrical frequency for full-power output in a range from about 50 Hz to about 150 Hz, with subsequent conversion to the fixed low frequency for off-shore collection.

Abstract translation: 根据本文的教导的一个方面，公开了各种馈线连接装置和架构，用于从海上采集电网中的风力涡轮机收集电力，其以固定的低频（例如，目标公用电网频率的三分之一）运行。 本文中的实施例详细描述了各种馈送器布置，例如使用平行馈线连接和基于群集的馈线布置，其中集中式变电站包括用于以升压电压输出电力的公共升压变压器，用于对陆上设备的低频传输 。 另外的方面涉及有利的生成布置，例如基于塔架的布置，用于使用例如具有在一个范围内的全功率输出的额定电频率的中速或高速齿轮箱驱动发电机将风力转换成电力 从约50Hz到约150Hz，随后转换到固定的低频用于离岸收集。

公开(公告)号：US20150134132A1

公开(公告)日：2015-05-14

申请号：US14080523

申请日：2013-11-14

Applicant: ABB Technology AG

Inventor： Xiaoming Feng ,  Will Briggs ,  Mani Subramanian ,  Ernst Scholtz

IPC: H02J4/00

CPC classification number: H02J4/00 ,  G06Q10/063 ,  G06Q50/06 ,  H02J2003/007

Abstract: The teachings herein disclose an advantageous method and apparatus for performing Security Constrained Economic Dispatch (SCED) for a hybrid power system that includes one or more AC grids interconnected with one or more multi-terminal High Voltage DC (HVDC) grids. The teachings include optimizing a non-linear objective function, subject to a set of constraints that include AC and DC grid constraints, for determining the SCED solution using successive linear approximation. The linear programming model used in the linear approximations is advantageously augmented with a DC grid portion in a manner that accounts for the effects of the DC grid on the AC grid, but which does not require exposing proprietary DC grid modeling details, and which conforms the resultant SCED solution to all applicable AC and DC grid constraints, including AC grid line flow constraints, AC grid power balance constraints, DC grid line flow constraints, and DC grid power balance constraints.

Abstract translation: 本文的教导公开了一种用于对包括与一个或多个多端子高压DC（HVDC）网格互连的一个或多个AC电网的混合电力系统执行安全约束经济调度（SCED）的有利方法和装置。 该教导包括优化非线性目标函数，受制于包括AC和DC网格约束的一组约束，用于使用连续线性近似来确定SCED解。 在线性近似中使用的线性规划模型有利地以直流电网部分的方式增加，其方式考虑了直流电网对交流电网的影响，但不需要暴露专有的直流电网建模细节，并且符合 所得到的SCED解决方案适用于所有适用的交流和直流电网约束，包括交流电网线路流量约束，交流电网功率平衡约束，直流电网线路流量约束和直流电网功率平衡约束。