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31 条记录 (耗时 0.038 秒)

    Network Protection for Power Spot Networks
    5.
    发明申请
    Network Protection for Power Spot Networks 审中-公开
    电力网络网络保护

    公开(公告)号：US20120267896A1

    公开(公告)日：2012-10-25

    申请号：US13090789

    申请日：2011-04-20

    申请人： Kevin L. Cousineau ,  Douglas C. Blodgett ,  William L. Erdman

    发明人： Kevin L. Cousineau ,  Douglas C. Blodgett ,  William L. Erdman

    IPC分类号： F03D9/00 ,  H02H7/00

    CPC分类号： H02H7/30

    摘要： A power supply system having a spot network is disclosed. The spot network may include first and second power output lines, and first and second accessory power circuits connected in parallel to the first and the second power output lines, respectively. Each of the first and the second accessory power circuits may have a transformer and a circuit breaker connected together to protect the spot network by coordinating impedance of the transformer with trip characteristics of the circuit breaker.

    摘要翻译： 公开了具有点网络的电源系统。 点网络可以包括第一和第二电力输出线，以及分别与第一和第二电力输出线并联连接的第一和第二辅助电源电路。 第一和第二辅助电源电路中的每一个可以具有连接在一起的变压器和断路器，以通过使变压器的阻抗与断路器的跳闸特性协调来保护点网络。

    Four quadrant motor controller minimizing distortion index
    7.
    发明授权
    Four quadrant motor controller minimizing distortion index 失效
    四象限电机控制器最小化失真指数

    公开(公告)号：US5585708A

    公开(公告)日：1996-12-17

    申请号：US384628

    申请日：1995-02-06

    申请人： Robert D. Richardson ,  William L. Erdman

    发明人： Robert D. Richardson ,  William L. Erdman

    IPC分类号： H02M5/458 ,  H02P21/00 ,  H02P21/06 ,  H02P21/14 ,  H02P23/00 ,  H02P23/06 ,  H02P23/14 ,  H02P27/06 ,  H02P5/40

    CPC分类号： H02P27/06 ,  H02M5/4585 ,  H02P21/06 ,  H02P21/20 ,  H02P23/06 ,  H02P23/14 ,  H02P23/30 ,  H02P2207/01

    摘要： A motor control apparatus and method is disclosed for controlling a multiphase AC motor by controlling electrical quantities such as voltage or current applied to the stator of the motor. The apparatus includes a motor command unit for defining a reference signal indicative of a desired motor parameter such as torque, speed, or position, a DC voltage link, a controller, a line-side converter including active switches in a bridge configuration for controlling the bidirectional flow of electrical power between the DC voltage link and a source of AC power, and a motor-side converter including active switches in a bridge configuration for controlling stator electrical quantities by controlling the bidirectional flow of electrical power between the DC voltage link and the motor, where the motor-side converter includes control means responsive to the reference signal for controlling the active switches to produce stator electrical quantities that correspond to the reference signal.

    摘要翻译： 公开了一种电动机控制装置和方法，用于通过控制施加到电动机的定子的电压或电流等电量来控制多相交流电动机。 该装置包括用于定义表示期望的电动机参数（例如转矩，速度或位置）的参考信号的电动机命令单元，DC电压链路，控制器，包括桥式配置中的主动开关的线路侧转换器，用于控制 直流电压链路和交流电源之间的双向电力流动以及包括用于控制定子电量的桥式结构的有源开关的电动机侧转换器，其通过控制直流电压链路与直流电压链路之间的双向电力流动 马达，其中电动机侧转换器包括响应于参考信号的控制装置，用于控制有源开关以产生对应于参考信号的定子电量。

    Utility current feedback filter with pulse-width modulated power converter
    8.
    发明授权
    Utility current feedback filter with pulse-width modulated power converter 失效
    具有脉冲宽度调制功率转换器的电流反馈滤波器

    公开(公告)号：US5526252A

    公开(公告)日：1996-06-11

    申请号：US212511

    申请日：1994-03-11

    申请人： William L. Erdman

    发明人： William L. Erdman

    IPC分类号： H02J3/06 ,  H02M7/5395

    CPC分类号： H02J3/06 ,  H02M1/12

    摘要： A utility feedback filter for a self-commutated, pulse-width modulated power electronic converter. A feedback node is coupled to detect the utility current which is then utilized in a feedback loop through a feedback circuit. The feedback processed utility current is summed with the requested utility current, and the difference is used to generate a pulse-width modulation pattern. The damping factor can be adjusted by the feedback circuit, which preferably has a transfer function of K.sub.f +K.sub.d, where K.sub.f is a proportional feedback gain and K.sub.d is a derivative feedback gain. Utilization of the actual utility current provides precise control of the current supplied to the utility, which substantially reduces or even eliminates the high frequency harmonic components. Furthermore, by proper choice of the components in the feedback circuit, the resistive value of a damping resistor can be decreased, thereby reducing wasteful dissipation of power.

    摘要翻译： 用于自换向脉冲宽度调制电力电子转换器的效用反馈滤波器。 反馈节点被耦合以检测公用电流，然后通过反馈电路在反馈环路中使用。 反馈处理的公用事业电流与所请求的有用电流相加，差值用于产生脉宽调制模式。 阻尼因子可以通过反馈电路进行调整，反馈电路优选具有Kf + Kd的传递函数，其中Kf是比例反馈增益，Kd是微分反馈增益。 实际电力电流的利用提供对供电公用电力的电流的精确控制，这大大降低甚至消除了高频谐波分量。 此外，通过适当选择反馈电路中的组件，可以减小阻尼电阻的电阻值，从而减少浪费的功率耗散。

    Systems and methods for synchronous speed avoidance in doubly-fed induction generators
    9.
    发明授权
    Systems and methods for synchronous speed avoidance in doubly-fed induction generators 有权
    双馈感应发电机同步避速的系统和方法

    公开(公告)号：US08035240B2

    公开(公告)日：2011-10-11

    申请号：US12129543

    申请日：2008-05-29

    申请人： William L. Erdman ,  Michael R. Behnke ,  Steve Tonks ,  Miguel Núñez Polo

    发明人： William L. Erdman ,  Michael R. Behnke ,  Steve Tonks ,  Miguel Núñez Polo

    IPC分类号： F03D9/00 ,  H02P9/04

    CPC分类号： H02P9/007 ,  H02P29/68 ,  H02P2101/15

    摘要： The disclosure details implementations of apparatuses, methods, and systems for facilitating efficient operational characteristics for wind turbine generators. The system includes features that facilitate protecting the power semiconductors used in the power converters of variable speed power generation systems from excessive junction temperatures. These features may be achieved by implementing a synchronous speed avoidance (SSA) controller implemented to facilitate a determined active control range as an electrical torque/power-generator rotor speed controller. The determined active control range may be centered around a generator synchronous speed. The upper and lower bounds of the active control range are determined based on operational junction temperature characteristics of power semiconductors used within a power converter, reliability characteristics of the power semiconductors and/or current ratings of the power semiconductors.

    摘要翻译： 本公开详细描述了用于促进风力涡轮发电机的有效操作特性的装置，方法和系统的实现。 该系统包括有助于保护变速发电系统的电力转换器中使用的功率半导体免受过多结温的特征。 这些特征可以通过实现实现为便于确定的主动控制范围作为电力转矩/发电机转子速度控制器的同步速度避免（SSA）控制器来实现。 确定的主动控制范围可以围绕发电机同步速度居中。 主动控制范围的上限和下限根据功率转换器内使用的功率半导体的运行结温特性，功率半导体的可靠性特性和/或功率半导体的电流额定值来确定。

    Wind farm electrical system
    10.
    发明授权
    Wind farm electrical system 失效

    公开(公告)号：US07071579B2

    公开(公告)日：2006-07-04

    申请号：US10458588

    申请日：2003-06-09

    申请人： William L. Erdman ,  Terry M. Lettenmaier

    发明人： William L. Erdman ,  Terry M. Lettenmaier

    IPC分类号： F03D9/00 ,  H02P9/04

    CPC分类号： F03D7/0284 ,  F03D7/048 ,  F05B2260/96 ,  Y02E10/723

    摘要： An approach to wind farm design using variable speed wind turbines with low pulse number electrical output. The output of multiple wind turbines are aggregated to create a high pulse number electrical output at a point of common coupling with a utility grid network. Power quality at each individual wind turbine falls short of utility standards, but the aggregated output at the point of common coupling is within acceptable tolerances for utility power quality. The approach for aggregating low pulse number electrical output from multiple wind turbines relies upon a pad mounted transformer at each wind turbine that performs phase multiplication on the output of each wind turbine. Phase multiplication converts a modified square wave from the wind turbine into a 6 pulse output. Phase shifting of the 6 pulse output from each wind turbine allows the aggregated output of multiple wind turbines to be a 24 pulse approximation of a sine wave. Additional filtering and VAR control is embedded within the wind farm to take advantage of the wind farm's electrical impedence characteristics to further enhance power quality at the point of common coupling.