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    MODULATION OF AC/AC MMC
    2.
    发明申请
    MODULATION OF AC/AC MMC 审中-公开

    公开(公告)号：US20190199230A1

    公开(公告)日：2019-06-27

    申请号：US16326038

    申请日：2016-08-18

    申请人： ABB SCHWEIZ AG

    发明人： Michail VASILADIOTIS ,  Tobias GEYER ,  Alexandre CHRISTE

    IPC分类号： H02M5/293 ,  H02M5/22 ,  H02M5/297

    CPC分类号： H02M5/225 ,  H02J3/01 ,  H02J3/34 ,  H02M1/08 ,  H02M1/12 ,  H02M5/293 ,  H02M5/297 ,  H02M2001/0006 ,  H02M2007/4835

    摘要： A method of decoupled modulation of a direct AC/AC MMC between a first AC network having a first waveform and a second AC network having a second waveform, the MMC having a double-star topology with a plurality of phase legs, each phase leg having a first branch and a second branch, each of the first and second branches comprising a plurality of series connected bipolar cells. The method includes performing a first modulation based on a reference signal of the first AC network, independently of a reference signal of the second AC network, to generate, for each phase leg, a first integer command signal corresponding to a first combination of cell states in the first and second branches of the phase leg needed for generating the first waveform. The method also comprises performing a second modulation based on the reference signal of the second AC network, independently of the reference signal of the first AC network to generate, for each phase leg, a second integer command signal corresponding to a second combination of cell states in the first and second branches of the phase leg needed for generating the second waveform. The method also includes, based on the first and second integer command signals, mapping to each branch a number of cell states to be used for concurrently generating both the first and second waveforms, generating branch-level command signals to a capacitor voltage balancing algorithm. The method also includes, based on the mapping and the balancing algorithm, sending firing signals to the plurality of cells of each branch.

    Method And Control System For Controlling A Voltage Source Converter Using Power-Synchronization Control
    3.
    发明申请
    Method And Control System For Controlling A Voltage Source Converter Using Power-Synchronization Control 审中-公开

    公开(公告)号：US20190157870A1

    公开(公告)日：2019-05-23

    申请号：US16190926

    申请日：2018-11-14

    申请人： ABB Schweiz AG

    发明人： Lennart Harnefors ,  Lidong Zhang

    IPC分类号： H02J3/34

    CPC分类号： H02J3/34 ,  H02M7/53871

    摘要： A method of controlling a grid-connected voltage source converter, VSC, using power-synchronisation control, wherein the method includes: determining a VSC current vector (i) based on a VSC phase angle (θ) which is determined based on an integration of a power control error, determining an active power producing current component (idref) of a reference current vector (iref) based on an active power reference (Pref) for the VSC, determining the reference current vector (iref) based on the active power producing current component (idref), determining a damping component based on a virtual damping resistance (Ra), the reference current vector (iref) and the VSC current vector (i), determining a voltage vector (v) based on a VSC voltage magnitude (V) and the damping component, and controlling the VSC based on the voltage vector (v).

    DUAL-SHAFT GAS TURBINE POWER GENERATION SYSTEM, AND CONTROL DEVICE AND CONTROL METHOD FOR GAS TURBINE SYSTEM
    6.
    发明申请
    DUAL-SHAFT GAS TURBINE POWER GENERATION SYSTEM, AND CONTROL DEVICE AND CONTROL METHOD FOR GAS TURBINE SYSTEM 审中-公开
    双轴气涡轮发电系统及气体涡轮机系统控制装置及控制方法

    公开(公告)号：US20170077750A1

    公开(公告)日：2017-03-16

    申请号：US15343719

    申请日：2016-11-04

    申请人： HITACHI, LTD.

    发明人： Noriaki HINO ,  Naohiro KUSUMI ,  Kazuo TAKAHASHI ,  Tomomichi ITO

    IPC分类号： H02J13/00 ,  F02C7/36 ,  F02C3/10 ,  F02C7/057 ,  H02J3/34 ,  H02K7/18

    CPC分类号： H02J13/0006 ,  F01D15/10 ,  F02C3/04 ,  F02C3/10 ,  F02C7/057 ,  F02C7/36 ,  F02C9/00 ,  F02C9/20 ,  F02C9/54 ,  F05D2220/7642 ,  F05D2270/053 ,  F05D2270/335 ,  H02J3/34 ,  H02K7/1823 ,  H02P3/02

    摘要： The dual-shaft gas turbine power generation system includes: a high-pressure gas turbine; a first rotating shaft connecting a compressor and the high-pressure gas turbine; an electric motor connected to the first rotating shaft; a governor which adjusts the amount of air taken into the compressor; a low-pressure gas turbine; a second rotating shaft connected to the low-pressure gas turbine; a synchronous power generator connected to the second rotating shaft; a frequency converter which converts the frequency of power transmitted between the synchronous power generator and the electric motor; and a control device which controls a frequency converter control device for controlling the frequency converter, and the governor, on the basis of a power output command value indicating the power to be outputted to an external grid.

    摘要翻译： 双轴燃气轮机发电系统包括：高压燃气轮机; 连接压缩机和高压燃气轮机的第一旋转轴; 连接到第一旋转轴的电动马达; 调节进入压缩机的空气量的调速器; 低压燃气轮机; 连接到低压燃气轮机的第二旋转轴; 连接到所述第二旋转轴的同步发电机; 变频器，其转换同步发电机与电动机之间传递的动力频率; 以及控制装置，其基于指示要输出到外部电网的电力的功率输出指令值，控制用于控制变频器的变频器控制装置和调速器。

    Transferring electrical power for subsea applications
    7.
    发明授权
    Transferring electrical power for subsea applications 有权
    转移用于海底应用的电力

    公开(公告)号：US09553522B2

    公开(公告)日：2017-01-24

    申请号：US14322502

    申请日：2014-07-02

    申请人： Ove Boe ,  Espen Haugan

    发明人： Ove Boe ,  Espen Haugan

    IPC分类号： H02M5/16 ,  H02M5/27 ,  H02J3/22 ,  H02J3/34 ,  H02M5/12

    CPC分类号： H02M5/16 ,  H02J3/22 ,  H02J3/34 ,  H02M5/12 ,  H02M5/27

    摘要： A method for transferring electrical power in the sea includes generating AC power, guiding, at least partially underwater, the AC power through a cable from a first end of the cable to a second end of the cable, and changing a frequency of the AC power guided through the cable based on a value of power consumption of a load connected to the second end of the cable.

    摘要翻译： 一种用于在海上转移电力的方法包括产生交流电力，至少部分地将水中的AC电力通过电缆从电缆的第一端引导到电缆的第二端，并且改变AC电源的频率 基于连接到电缆的第二端的负载的功率消耗值来引导电缆。

    Converter station power set point analysis system and method
    8.
    发明授权
    Converter station power set point analysis system and method 有权
    变电站功率设定点分析系统及方法

    公开(公告)号：US09450409B2

    公开(公告)日：2016-09-20

    申请号：US13922644

    申请日：2013-06-20

    申请人： ABB Research Ltd.

    发明人： Debrup Das ,  Reynaldo Nuqui ,  Mats Larsson

    IPC分类号： G06F1/32 ,  H02J3/14 ,  H02J3/34 ,  H02J3/38 ,  H02J3/36

    CPC分类号： H02J3/14 ,  G06F1/3203 ,  H02J3/34 ,  H02J3/36 ,  H02J3/38 ,  Y02E60/60

    摘要： Converter stations have real and reactive power set points initially determined as part of a main loadflow analysis routinely performed on the AC power system connected to the converter stations. Viable real and/or reactive power set points for the converter stations can be identified by calculating real and/or reactive power set point candidates for the converter stations before the main loadflow analysis is performed again on the AC power system. The power set point candidates are calculated based on information determined as part of a previous iteration of the main loadflow analysis on the AC power system. The power set point candidates which violate an operating constraint imposed on the AC power system are identified, and a region of valid power set points is defined for the converter stations that excludes the power set point candidates which violate an operating constraint imposed on the AC power system.

    摘要翻译： 转换器站具有最初确定为在连接到转换器站的AC电力系统上常规执行的主要负载流分析的一部分的实际和无功功率设定点。 可以通过在AC电力系统再次执行主负载流分析之前计算转换器站的实际和/或无功功率设定点候选来识别转换站的可行的实际和/或无功功率设定点。 功率设定点候选是基于作为交流电力系统主负载流分析的先前迭代的一部分确定的信息来计算的。 识别违反施加在交流电力系统上的操作约束的功率设定点候选，并且为排除违反施加于交流电源的操作约束的功率设定点候选的转换器站定义有效功率设定点的区域 系统。

    SYSTEM FOR TRANSMITTING ELECTRICAL POWER
    9.
    发明申请
    SYSTEM FOR TRANSMITTING ELECTRICAL POWER 审中-公开
    发电系统

    公开(公告)号：US20160254668A1

    公开(公告)日：2016-09-01

    申请号：US15027786

    申请日：2013-10-07

    申请人： SIEMENS AKTIENGESELLSCHAFT

    发明人： HARTMUT HUANG ,  PETER MENKE ,  KARLHEINZ SPRINGER ,  MICHAEL WEINHOLD

    IPC分类号： H02J3/36 ,  H02J3/34 ,  H02M7/06 ,  H02J3/38

    CPC分类号： H02J3/36 ,  H02J3/34 ,  H02J3/386 ,  H02M7/06 ,  H02M2007/4835 ,  Y02E10/763 ,  Y02E60/60

    摘要： A system transmits electrical power between a first and a second alternating voltage network. A self-commutated converter can be connected to the second alternating voltage network, the converter being connected to an unregulated rectifier via a direct voltage connection. The unregulated rectifier can be connected to the first alternating voltage network on an alternating voltage side. The system has a network generation device, which can be connected to the first alternating voltage network and is provided for generating an alternating voltage in the first alternating voltage network. The network generation device is configured to exchange reactive power and active power with the first alternating voltage network. Furthermore, a method is provided which stabilizes a network frequency of the first alternating voltage network, in which the network frequency in the first alternating voltage network is regulated by changing a voltage at the direct voltage terminal of the self-commutated converter.

    摘要翻译： 系统在第一和第二交流电压网络之间传输电力。 自整流转换器可以连接到第二交流电压网络，转换器通过直流电压连接连接到未调节的整流器。 不稳定的整流器可以在交流电压侧连接到第一交流电压网络。 该系统具有可连接到第一交流电压网络并被提供用于在第一交流电压网络中产生交流电压的网络产生装置。 网络生成装置被配置为与第一交流电压网络交换无功功率和有功功率。 此外，提供一种稳定第一交流电压网络的网络频率的方法，其中通过改变自换向转换器的直流电压端子处的电压来调节第一交变电压网络中的网络频率。