Hybrid AC/DC converter for HVDC applications
    21.
    发明授权
    Hybrid AC/DC converter for HVDC applications 有权
    用于HVDC应用的混合AC / DC转换器

    公开(公告)号:US09362848B2

    公开(公告)日:2016-06-07

    申请号:US14359088

    申请日:2011-11-17

    Abstract: A power electronic converter, for connecting AC and DC networks and transferring power therebetween, comprises: first and second DC terminals for connection in use to a DC network; at least one primary converter limb extending between the first and second DC terminals and having first and second primary limb portions separated by a primary AC terminal for connection in use to a respective phase of a multi-phase AC network, at least one of the first and second primary limb portions including at least one primary active switching module to selectively allow current to flow through the corresponding primary converter limb in a first direction from the corresponding primary AC terminal to the DC terminals and in a second direction from the DC terminals to the corresponding primary AC terminal; and at least one secondary converter limb extending between the first and second DC terminals and having first and second secondary limb portions separated by a secondary AC terminal for connection in use to a further respective phase of the said multi-phase AC network, each of the first and second secondary limb portions including at least one passive current check element to limit current flow through the corresponding secondary converter limb to a single direction from the corresponding secondary AC terminal to the DC terminals.

    Abstract translation: 一种用于连接AC和DC网络并在其间传递电力的电力电子转换器包括:用于连接到DC网络的第一和第二DC终端; 至少一个主转换器分支,其在所述第一和第二DC终端之间延伸并且具有由主AC终端隔开的第一和第二主分支部分,用于连接到多相AC网络的相应相位,所述第一和第二主分支部分中的至少一个 以及第二主要肢体部分,其包括至少一个主要有源切换模块,用于选择性地允许电流沿着第一方向从相应的主AC端子到DC端子以及从DC端子到第二方向的第二方向流过对应的主转换器臂 相应的主交流电源; 以及至少一个次级转换器分支,其在所述第一和第二DC终端之间延伸并且具有被辅助AC端子分隔开的第一和第二辅助分支部分,用于连接到所述多相AC网络的另外的相位, 第一和第二副肢部分包括至少一个无源电流检查元件,以将来自相应次级转换器支路的电流限制到从相应的次级AC端子到DC端子的单个方向。

    CONTROL CIRCUIT
    22.
    发明申请
    CONTROL CIRCUIT 有权
    控制电路

    公开(公告)号:US20150009594A1

    公开(公告)日:2015-01-08

    申请号:US14378319

    申请日:2012-03-01

    Abstract: The control circuit includes first and second primary terminals for connection to a DC network, a secondary terminal connected in series between the first and second primary terminals and at least one auxiliary energy conversion element and an auxiliary terminal. The first and second primary terminals have a plurality of modules and a plurality of primary energy conversion elements connected in series therebetween to define a current transmission path, each module including at least one energy storage device, each energy storage device being selectively removable from the current transmission path. The plurality of modules include a first module and a second module the first module being connected in series with at least one primary energy conversion element between the first primary terminal and the secondary terminal to define a first current transmission path portion, and the second module being connected in series with at least one other primary energy conversion element between the second primary terminal and the secondary terminal to define a second current transmission path portion. The auxiliary energy conversion element is connected in series between the secondary and auxiliary terminals, the auxiliary terminal being for connection to ground.

    Abstract translation: 控制电路包括用于连接到DC网络的第一和第二初级端子,串联连接在第一和第二主要端子与至少一个辅助能量转换元件和辅助端子之间的次级端子。 第一和第二主端子具有多个模块和多个一次能量转换元件,其间串联连接以限定当前传输路径,每个模块包括至少一个能量存储装置,每个能量存储装置可从电流选择性地移除 传输路径。 多个模块包括第一模块和第二模块,第一模块与第一主要端子和次级端子之间的至少一个主要能量转换元件串联连接以限定第一电流传输路径部分,第二模块是 与第二主要端子和次级端子之间的至少一个其它主要能量转换元件串联连接以限定第二电流传输路径部分。 辅助能量转换元件串联连接在辅助端子和辅助端子之间,辅助端子用于连接到地面。

    Modular multilevel power electronic converter having selectively definable circulation path
    23.
    发明授权
    Modular multilevel power electronic converter having selectively definable circulation path 有权
    具有选择性定义的循环路径的模块化多电平功率电子转换器

    公开(公告)号:US08848401B2

    公开(公告)日:2014-09-30

    申请号:US13881215

    申请日:2010-10-27

    CPC classification number: H02J3/36 H02J3/1814 H02J7/02 H02M7/49 H02M2007/4835

    Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation includes at least one converter limb, which includes first and second DC terminals and an AC terminal. Each converter limb defines first and second limb portions connected in series between the AC terminal and a respective one of the first and second DC terminals. Each limb portion includes a chain-link converter connected in series with at least one primary switching element. Each chain-link converter includes a plurality of modules connected in series, and each module includes at least one secondary switching element connected to at least one energy storage device. Each primary switching element in each limb portion of a respective converter limb selectively defines a circulation path which carries a DC circulation current to regulate the energy level of at least one energy storage device in a respective chain-link converter.

    Abstract translation: 用于高压直流电力传输和无功补偿的电力电子转换器包括至少一个转换器臂,其包括第一和第二直流端子和AC端子。 每个转换器肢体限定串联连接在AC端子和第一和第二DC端子中的相应一个的第一和第二臂部分。 每个肢体部分包括与至少一个主要开关元件串联连接的链节转换器。 每个链式转换器包括串联连接的多个模块,并且每个模块包括连接到至少一个能量存储装置的至少一个次级开关元件。 相应转换器肢体的每个肢体部分中的每个主要开关元件选择性地限定循环路径,其承载DC循环电流以调节相应链式转换器中的至少一个能量存储装置的能量水平。

    HVDC CONVERTER WITH NEUTRAL-POINT CONNECTED ZERO-SEQUENCE DUMP RESISTOR
    24.
    发明申请
    HVDC CONVERTER WITH NEUTRAL-POINT CONNECTED ZERO-SEQUENCE DUMP RESISTOR 有权
    具有中性点连接的零序电阻电抗器的高压直流转换器

    公开(公告)号:US20140146583A1

    公开(公告)日:2014-05-29

    申请号:US13818654

    申请日:2010-08-24

    Abstract: A power electronic converter (30)is for use in high voltage direct current power transmission and reactive power compensation, the power electronic converter (30) including three phase elements (32) defining a star connection (36) and a converter unit (34) including first and second DC terminals (50,52) for connection in use to a DC network (56) and three AC terminals (54), the converter unit (34) including a plurality of switching elements (70,74) controllable in use to facilitate power conversion between the AC and DC networks (44,56), the power electronic converter (30) further including a third DC terminal (78) connected between the first and second DC terminals (50,52), the third DC terminal (78) being connected to a common junction (40) of the star connection (36) to define an auxiliary connection (82), the auxiliary connection (82) including at least one dump resistor (84) connected between the common junction (40) and the third DC terminal (78), wherein the switching elements (70,74) of the converter unit (34) are controllable in use to modify a phase voltage at each AC terminal (54) to include a triplen harmonic voltage component so as to dissipate real power in the or each dump resistor (84) at a triplen harmonic frequency.

    Abstract translation: 电力电子转换器(30)用于高压直流电力传输和无功补偿,所述电力电子转换器(30)包括限定星形连接(36)和转换器单元(34)的三相元件(32) 包括用于连接到DC网络(56)和三个AC端子(54)的第一和第二DC终端(50,52),所述转换器单元(34)包括可在使用中控制的多个开关元件(70,74) 为了促进AC和DC网络之间的电力转换(44,56),电力电子转换器(30)还包括连接在第一和第二DC端子(50,52)之间的第三DC端子(78),第三DC端子 (78)连接到星形连接(36)的公共接头(40)以限定辅助连接(82),辅助连接(82)包括连接在公共接头(40)之间的至少一个卸载电阻器(84) )和第三DC端子(78),其中开关元件 转换器单元(34)中的70,74)在使用中是可控的,以修改每个AC端子(54)处的相电压以包括三次谐波电压分量,以便在该或每个转储电阻器(84)中消散有功功率 三倍谐波频率。

    HVDC Converter Comprising Fullbridge Cells For Handling A DC Side Short Circuit
    25.
    发明申请
    HVDC Converter Comprising Fullbridge Cells For Handling A DC Side Short Circuit 有权
    包括用于处理DC侧短路的全桥单元的HVDC转换器

    公开(公告)号:US20130128636A1

    公开(公告)日:2013-05-23

    申请号:US13813414

    申请日:2010-07-30

    Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises three converter limbs, each converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal for connection in use to a respective phase of a three-phase AC network, each converter limb defining first and second limb portions being connected in series between the respective AC terminal and a respective one of the first and second DC terminals, each limb portion including at least one switching element being controllable in use to facilitate power conversion between the AC and DC networks, the power electronic converter further including a plurality of auxiliary units, each auxiliary unit being operably associated with the respective phase of the AC network, each auxiliary unit including at least one module including a voltage source, the limb portions being controllable in use to define at least one three-phase static synchronous compensator including at least one of the plurality of auxiliary units in each branch of a star configuration, each of the first and/or second DC terminals defining the neutral point of the respective star configuration.

    Abstract translation: 用于高压直流电力传输和无功补偿的电力电子转换器包括三个转换器分支,每个转换器分支包括用于连接到DC网络的第一和第二DC终端和用于连接到相应的AC终端的AC终端 三相AC网络的相位,每个转换器限定第一和第二分支部分串联连接在相应AC端子与第一和第二DC端子中的相应一个之间,每个分支部分包括至少一个开关元件,其可控制 在用于促进​​AC和DC网络之间的电力转换的情况下,电力电子转换器还包括多个辅助单元,每个辅助单元可操作地与AC网络的相位相关联,每个辅助单元包括至少一个模块, 电压源,肢体部分在使用中是可控的,以限定至少一个三相s 同步补偿器包括星形结构的每个分支中的多个辅助单元中的至少一个,第一和/或第二直流端子中的每一个限定相应的星形结构的中性点。

    STATIC VAR COMPENSATOR WITH MULTILEVEL CONVERTER
    26.
    发明申请
    STATIC VAR COMPENSATOR WITH MULTILEVEL CONVERTER 有权
    具有多路转换器的静态补偿器

    公开(公告)号:US20130094264A1

    公开(公告)日:2013-04-18

    申请号:US13634205

    申请日:2010-03-15

    Abstract: A static synchronous compensator for use in reactive power compensation, the static synchronous compensator comprising at least one primary compensator limb including first and second DC terminals, and an AC terminal for connection in use to an AC network, the or each primary compensator limb defining first and second limb portions, each limb portion-including at least one switching element connected in series with a chain-link converter-between a respective one of the first and second DC terminate and the AC terminal, the switching elements of the first and second limb portions being operable to switch the respective chain-link converters in and out of circuit between the respective DC terminal and the AC terminal and the chain-link converters being operable to generate a voltage waveform at the AC terminal; and a secondary compensator limb including at least one DC link capacitor connected between the first and second DC terminals, the secondary compensator limb being connected in parallel with the or each primary compensator limb.

    Abstract translation: 一种用于无功补偿的静态同步补偿器,所述静态同步补偿器包括至少一个包括第一和第二DC端子的主补偿器支路和用于连接到AC网络的AC端子,所述或每个初级补偿器支路限定第一 和第二分支部分,每个分支部分 - 包括与第一和第二直流终端之间的相应一个与AC端子之间的链链路转换器串联连接的至少一个开关元件,第一和第二支路的开关元件 部分可操作以在相应的直流端子和交流端子之间切换各个链节转换器进入和离开电路,链式转换器可操作以在AC端子处产生电压波形; 以及次级补偿器支路,其包括连接在所述第一和第二DC端子之间的至少一个DC链路电容器,所述辅助补偿器支路与所述或每个主要补偿器支路并联连接。

    ELECTRICAL MACHINE
    27.
    发明申请
    ELECTRICAL MACHINE 有权
    电机

    公开(公告)号:US20090039652A1

    公开(公告)日:2009-02-12

    申请号:US12176663

    申请日:2008-07-21

    CPC classification number: H02P25/08 F01D15/10 F02C7/275 H02P6/185 H02P2203/01

    Abstract: Embedding electrical machines in gas turbine engines has particular advantages by avoiding the need to provide mechanical connections. However, electrical machines such as switched reluctance electrical machines require relatively large electrical capacitors to accommodate and filter voltage variations in the phases of the electrical machine. Generally, the electrical machine will have a motoring period or generating period with a spacer period between. By injecting electrical current as electrical power in the spacer period, there is limited effect upon net torque within the electrical machine or electrical power generation. However, such stored electrical power in an inductive winding element of the electrical machine augments power pulses provided by a power source incorporating an electrical capacitor. In such circumstances, a smaller sized electrical capacitor can be used.

    Abstract translation: 将电机嵌入燃气轮机中具有避免提供机械连接的需要的特别优点。 然而,诸如开关磁阻电机的电机需要相对较大的电容器来适应和滤除电机的相位中的电压变化。 一般来说,电机将具有驾驶期或发电期间间隔期间。 通过在隔离周期期间注入电流作为电力,对电机或发电中的电力转矩有有限的影响。 然而,电机的电感式绕组元件中的这种存储的电力增加了由并入有电容器的电源提供的功率脉冲。 在这种情况下,可以使用较小尺寸的电容器。

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