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    • 42. 发明申请
    • CONVERTERS FOR WIND TURBINE GENERATORS
    • 风力发电机转换器
    • US20160241153A1
    • 2016-08-18
    • US15030316
    • 2014-10-14
    • VESTAS WIND SYSTEMS A/S
    • Tusitha ABEYASEKERADuy Duc DOANLars HELLEAllan Holm JØRGENSENJohn Godsk NIELSENSøren ANDERSEN
    • H02M5/42F03D9/00H02M1/12H02M1/32H03H7/01
    • H02M5/42F03D9/255G01R31/40H02H3/105H02H7/122H02J3/28H02J3/386H02M1/12H02M1/32H02M5/4585H02M7/219H02M7/23H02M7/493H02M2001/0077H02M2001/123H02M2007/4822H03H7/0107Y02E10/725Y02E10/726Y02E10/763Y02E10/766Y02E70/30
    • A wind turbine generator 1 supplies three-phase a.c. current of variable voltage and variable frequency to two pairs of rectifiers 4a, 4b and 4c, 4d which generate respective d.c. outputs connected to positive, negative and neutral d.c. conductors 6, 7, 8. The outputs from each pair of rectifiers are connected together, and the outputs from the two pairs are connected in series to create a high-voltage d.c. output. Inverters 10a, 10b, 10c, 10d then convert the d.c. power to a.c. at a fixed frequency and voltage suitable for In connection to the mains grid. To reduce the effect of common-mode noise, a capacitor is connected between the 1 neutral conductor 7 and earth, and a respective filter circuit 30 is connected between each of the a.c. outputs of the inverters 10a, 10b, 10c, 10d and earth. To reduce the effect of voltage surges during lightning, a surge protection device is also connected between the neutral d.c. conductor 7 and earth. Any imbalance in the current in the positive and negative conductors 6, 8 is compensated by detecting the presence of current flowing in the neutral conductor 7. Power supplied to auxiliary circuits from the output of one of the inverters, e.g. 10a, of the wind turbine is measured, and any resulting imbalance between the current in the positive and negative conductors is compensated. In the event of an earth-leakage fault in the conductors connecting the a.c. outputs of the inverters to the grid, when isolated, isolation detection relays 25 are provided.
    • 风力发电机1提供三相交流电。 可变电压和可变频率的电流为两对整流器4a,4b和4c,4d,它们产生相应的直流。 输出连接到正,负和中性直流。 导体6,7,8。每对整流器的输出连接在一起,两对的输出串联连接,以产生高压直流。 输出。 逆变器10a,10b,10c,10d然后转换直流。 权力到a.c. 在固定的频率和电压适用于连接到电网。 为了降低共模噪声的影响,电容器连接在1个中性导体7和地之间,并且相应的滤波器电路30连接在每个直流电平之间。 逆变器10a,10b,10c,10d和地的输出。 为了减少雷击期间电压浪涌的影响,浪涌保护装置也连接在中性点间。 导体7和地球。 通过检测在中性导体7中流动的电流的存在来补偿正和负导体6,8中的电流的任何不平衡。从一个逆变器的输出,例如, 测量风力涡轮机的10a,并补偿正,负导体中的电流之间的任何不平衡。 在连接交流电的导体中发生漏电故障的情况。 当隔离的隔离检测继电器25被提供时,逆变器的输出到电网。
    • 43. 发明授权
    • Technique for reducing power consumed by electric equipment
    • 降低电力消耗功率的技术
    • US09411287B2
    • 2016-08-09
    • US14146455
    • 2014-01-02
    • CANON KABUSHIKI KAISHA
    • Tetsuya Nozaki
    • H02M3/24H02M5/42H02M7/04H02M7/68G03G15/00H02M1/00
    • G03G15/5004G03G15/80H02M2001/0006
    • When an image forming apparatus shifts to a power saving mode, a controller unit further reduces power consumption by switching AC current on/off every predetermined amount of time. When AC current input from a commercial AC power supply is turned off, a DC voltage generating circuit normally can no longer supply a DC voltage, rendering the controller unit unable to operate. Accordingly, the controller unit operates using a charge accumulated in a smoothing capacitor while the AC current is not being supplied. An AC cutting circuit is switched on before a both-end voltage at the smoothing capacitor drops below a lower limit of operation voltage of the DC voltage generating circuit, and the smoothing capacitor is recharged.
    • 当图像形成装置转换到省电模式时,控制器单元进一步通过每隔预定时间量切换交流电流来开启/关闭功率消耗。 当从商用交流电源输入的交流电流关闭时,直流电压发生电路通常不能再提供直流电压,使得控制器单元无法运行。 因此,控制器单元在没有提供AC电流的同时使用积累在平滑电容器中的电荷进行操作。 在平滑电容器的两端电压下降到低于直流电压产生电路的工作电压的下限之前,交流切换电路被接通,平滑电容器被再充电。
    • 46. 发明授权
    • Current balance control for non-interleaved parallel bridge circuits in power converter
    • 电力转换器中非交错并联桥电路的电流平衡控制
    • US09343991B2
    • 2016-05-17
    • US13744975
    • 2013-01-18
    • General Electric Company
    • Robert Gregory WagonerAnthony Michael Klodowski
    • H02M5/458H02M5/42H02M5/293H02M7/493H02P9/00H02P101/15
    • H02M5/42H02M5/293H02M5/4585H02M7/493H02P9/007H02P2101/15H02P2207/073
    • Systems and methods for reducing current imbalance between parallel bridge circuits used in a power converter of a power generation system, such as a wind driven doubly fed induction generator (DFIG) system, are provided. The power converter can include a plurality of bridge circuits coupled in parallel to increase the output power capability of the system. Each of the bridge circuits can include a pair of switching elements, such as insulated gate bipolar transistors (IGBTs), coupled in series with one another. The switching elements of the parallel bridge circuits can be controlled, for instance, using control commands (e.g. pulse width modulation commands) according to a substantially non-interleaved switching pattern. The timing of the control commands according to the substantially non-interleaved switching pattern can be adjusted to reduce current imbalance between the parallel bridge circuits.
    • 提供了用于减少在诸如风力驱动双馈感应发电机(DFIG)系统的发电系统的功率转换器中使用的并联桥电路之间的电流不平衡的系统和方法。 功率转换器可以包括并联耦合的多个桥式电路,以增加系统的输出功率能力。 每个桥接电路可以包括彼此串联耦合的一对开关元件,例如绝缘栅双极晶体管(IGBT)。 并联电路电路的开关元件可以例如根据基本上非交错的开关模式使用控制命令(例如,脉冲宽度调制命令)进行控制。 可以调整根据基本上非交织的开关模式的控制命令的定时,以减少并联桥电路之间的电流不平衡。
    • 49. 发明授权
    • Method for controlling a power converter in a wind turbine generator
    • 用于控制风力涡轮发电机中的功率转换器的方法
    • US09252601B2
    • 2016-02-02
    • US13498109
    • 2010-09-20
    • Yin BoHeng DengKim B. LarsenLars HelleMogens Lau
    • Yin BoHeng DengKim B. LarsenLars HelleMogens Lau
    • H02M5/42H02J3/38
    • H02J3/386Y02E10/763
    • A method for controlling a power converter in a wind turbine generator, the power converter being connected to a power grid, the method comprising obtaining an alternating current (AC) line voltage at a connection point between the power converter and the power grid, obtaining a frequency of the power grid based on the AC line voltage, dynamically adapting the AC line voltage to the frequency of the power grid, generating a reference signal based on at least the frequency-adapted AC line voltage, and determining a converter control signal to be provided to the power converter based on the reference signal and the grid frequency in order to generate a power at the frequency of the power grid. Further, a wind turbine generator implementing the method is provided.
    • 一种用于控制风力涡轮发电机中的功率转换器的方法,所述功率转换器连接到电网,所述方法包括在所述功率转换器和所述电网之间的连接点处获得交流(AC)线路电压,获得 根据交流线路电压对电力网的频率进行动态调整,将交流线路电压动态地调整到电力网的频率,至少基于频率适配的交流线路电压产生参考信号,并且确定转换器控制信号为 基于参考信号和电网频率提供给功率转换器,以便产生电力频率的功率。 此外,提供了实现该方法的风力涡轮发电机。