Reduction of harmonics in AC machines
    4.
    发明授权
    Reduction of harmonics in AC machines 失效
    减少交流电机谐波

    公开(公告)号:US06577487B2

    公开(公告)日:2003-06-10

    申请号:US09194566

    申请日:1998-11-27

    申请人: Lars Gertmar

    发明人: Lars Gertmar

    IPC分类号: H02J301

    CPC分类号: H02J3/01 Y02E40/40

    摘要: Connection arrangements are employed for reducing the effect of third-hannonic voltages in case of direct connection of AC machines to a three-phase distribution or transmission network, wherein the stator winding of the AC machine is Y-connected and wherein the neutral point of the winding is available. An exemplary embodiment employs a suppression filter turned to the third-harmonic, with an overvoltage protection device arranged between the neutral point and ground of the power network.

    摘要翻译: 在将AC电机直接连接到三相分配或传输网络的情况下,采用连接装置来减少第三汉诺电压的影响,其中AC电机的定子绕组是Y形连接的,其中, 绕组可用。 示例性实施例采用转向三次谐波的抑制滤波器,其中过电压保护装置布置在电力网络的中性点和地之间。

    COORDINATED CONTROL METHOD FOR POWER DISTRIBUTION SYSTEM WITH DC BUS ELECTRIFICATION SCHEME AND APPARATUS THEREOF
    5.
    发明申请
    COORDINATED CONTROL METHOD FOR POWER DISTRIBUTION SYSTEM WITH DC BUS ELECTRIFICATION SCHEME AND APPARATUS THEREOF 审中-公开
    具有直流总线电力方案的配电系统的协调控制方法及其设备

    公开(公告)号:US20140240880A1

    公开(公告)日:2014-08-28

    申请号:US14354670

    申请日:2012-04-16

    IPC分类号: H02H7/22

    CPC分类号: H02H7/22 H02J1/00 H02J11/00

    摘要: The present invention discloses a coordinated control method for power distribution system with DC bus electrification scheme and apparatus thereof. The method comprises: detecting what kind of disturbances occurs, and at least one of following steps: restoring the voltages of the failed DC buses if power loss is detected on the DC buses due to temporary or permanent failures of upstream power supplies; controlling the voltage of the abnormal DC buses if overvoltage or under-voltage is detected on the DC buses due to internal or external disturbances; and supporting the voltages of the abnormal AC buses if overvoltage or under-voltage is detected on the AC buses due to internal or external disturbances. The methods and apparatus can further improve the fault-ride-through capability for power plant under external or internal disturbances, and facilitate smooth automatic switching process between two DC buses etc.

    摘要翻译: 本发明公开了一种具有DC总线通电方案及其装置的配电系统的协调控制方法。 该方法包括:检测发生什么样的干扰,以及至少一个以下步骤:由于上游电源的暂时或永久性故障,在DC总线上检测到功率损耗时,恢复故障的直流总线的电压; 由于内部或外部干扰,在直流母线上检测到过电压或欠电压时,控制异常直流母线的电压; 并且由于内部或外部干扰,在AC总线上检测到过电压或欠压时,支持异常AC总线的电压。 该方法和装置可以进一步提高发电厂在外部或内部干扰下的故障穿越能力,并促进两台直流母线之间的平滑自动切换过程。

    Wind mill power flow control with dump load and power converter
    6.
    发明授权
    Wind mill power flow control with dump load and power converter 有权
    风机功率流量控制,带倾卸负载和功率转换器

    公开(公告)号:US08436490B2

    公开(公告)日:2013-05-07

    申请号:US11991326

    申请日:2006-08-30

    IPC分类号: H01H79/00

    摘要: A wind mill apparatus for generating electric power to a grid point of an electric network. The apparatus includes a wind rotor, an electric generator operatively connected to the wind rotor, and an electric multiphase ac link operatively connecting the generator to the grid point. The ac link includes a first current path including a switchgear, a second current path including a dc link including a first converter operatively connected to the generator, a second converter operatively connected to the grid point, and a capacitor operatively connected between the conductors of the dc link. The ac link further includes a connectable multiphase dump load for blocking during a fault condition on the network the reactive power flow in the ac link, yet providing a reduced transfer of active power.

    摘要翻译: 一种用于向电网的网格点产生电力的风车装置。 该装置包括风力转子,可操作地连接到风力转子的发电机和可操作地将发电机连接到电网点的电动多相交流连接。 交流连接包括包括开关装置的第一电流路径,包括直流链路的第二电流路径,所述直流链路包括可操作地连接到发电机的第一转换器,可操作地连接到电网点的第二转换器,以及可操作地连接在所述发电机的导体之间的电容器 直流连接。 交流链路还包括可连接的多相转储负载,用于在网络中的故障状态期间阻塞交流链路中的无功功率流,同时提供有功功率的减少传输。

    Internal Electrification Scheme For Power Generation Plants
    7.
    发明申请
    Internal Electrification Scheme For Power Generation Plants 有权
    发电厂内部电气化方案

    公开(公告)号:US20120181862A1

    公开(公告)日:2012-07-19

    申请号:US13309201

    申请日:2011-12-01

    IPC分类号: H02J3/34

    摘要: An apparatus for use in an electrical power generation plant. The apparatus includes: at least two adjustable speed drives, each connected, on an alternating current side, to an associated auxiliary motor; at least one reactive power consuming auxiliary device connected to an alternating current bus; a controller; a converter for converting alternating current to direct current or vice versa between the alternating current bus and a direct current bus; and at least one electrical power source arranged to provide power to the direct current bus. Each of the at least two adjustable speed drive is connected, on a direct current side, to the direct current bus.

    摘要翻译: 一种用于发电厂的设备。 该装置包括:至少两个可调速驱动器,每个在交流电侧连接到相关联的辅助马达; 连接到交流母线的至少一个无功功率辅助装置; 控制器 用于在交流母线和直流总线之间将交流电转换为直流或反之亦然的转换器; 以及至少一个电源,被布置成向直流母线提供电力。 至少两个可调速驱动器中的每一个在直流侧连接到直流总线。

    Wind mill power flow control with dump load and power converter
    8.
    发明申请
    Wind mill power flow control with dump load and power converter 有权
    风机功率流量控制,带倾卸负载和功率转换器

    公开(公告)号:US20100292852A1

    公开(公告)日:2010-11-18

    申请号:US11991326

    申请日:2006-08-30

    IPC分类号: G06F1/30 H02H7/06

    摘要: A wind mill apparatus for generating electric power to a grid point of an electric network. The apparatus includes a wind rotor, an electric generator operatively connected to the wind rotor, and an electric multiphase ac link operatively connecting the generator to the grid point. The ac link includes a first current path including a switchgear, a second current path including a dc link including a first converter operatively connected to the generator, a second converter operatively connected to the grid point, and a capacitor operatively connected between the conductors of the dc link. The ac link further includes a connectable multiphase dump load for blocking during a fault condition on the network the reactive power flow in the ac link, yet providing a reduced transfer of active power.

    摘要翻译: 一种用于向电网的网格点产生电力的风车装置。 该装置包括风力转子,可操作地连接到风力转子的发电机和可操作地将发电机连接到电网点的电动多相交流连接。 交流连接包括包括开关装置的第一电流路径,包括直流链路的第二电流路径,所述直流链路包括可操作地连接到发电机的第一转换器,可操作地连接到电网点的第二转换器,以及可操作地连接在所述发电机的导体之间的电容器 直流连接。 交流链路还包括可连接的多相转储负载,用于在网络中的故障状态期间阻塞交流链路中的无功功率流,同时提供有功功率的减少传输。

    Electric power network
    10.
    发明授权
    Electric power network 失效
    电力网

    公开(公告)号:US07447568B2

    公开(公告)日:2008-11-04

    申请号:US10584211

    申请日:2004-12-22

    IPC分类号: G05D11/00

    CPC分类号: H02H3/025 H02H7/06 H02H7/093

    摘要: A device for controlling at a fault condition. An apparatus is connected by a connection line to a grid point of a transmission net in an electric power network. A voltage raising apparatus includes a first branch connected to the grid point including a switching element and a second branch including a current resisting means. The voltage raising apparatus includes a computer for signal processing of a sensed fault condition on the network and for affecting the operation of the switching element such that on a fault condition at least part of the current is diverted through the voltage raising apparatus and for evaluation of further actions.

    摘要翻译: 用于在故障状态下进行控制的装置。 设备通过连接线连接到电力网络中的传输网的网格点。 升压装置包括连接到包括开关元件的栅极点的第一支路和包括电流阻抗装置的第二支路。 升压装置包括用于对网络上感测到的故障状况进行信号处理并影响开关元件的操作的计算机,使得在故障状态下,电流的至少一部分通过升压装置转移并用于评估 进一步的行动。