MODULAR MULTI-LEVEL CONVERTER WITH THYRISTOR VALVES

    公开(公告)号:US20170338654A1

    公开(公告)日:2017-11-23

    申请号:US15532386

    申请日:2014-12-22

    Abstract: An interface arrangement is configured to couple an alternating current, AC, power system with a direct current, DC, power system, or vice versa. The interface arrangement includes a plurality of series-connected converter modules. Each converter module includes at least one multi-level converter cell configured to provide a voltage contribution to at least a portion of an AC waveform for example based on voltage of the DC power system. Each converter module includes at least one converter valve, electrically connected to the multi-level converter cells and including at least two anti-parallel thyristors. The converter valves are switchable between conducting states with a selected current conduction direction and a non-conducting state so as to selectively control polarity of any voltage contribution provided by the at least one multi-level converter cell. The converter valves can also serve as fault protection, e.g. to divert overcurrents.

    Multilevel converter with hybrid full-bridge cells

    公开(公告)号:US09716425B2

    公开(公告)日:2017-07-25

    申请号:US14653721

    申请日:2013-01-21

    Abstract: A multilevel converter converting between AC and DC includes a phase arm with a number of cells between a DC pole and an AC terminal, the cells include at least one hybrid full bridge cell including a first cell connection terminal for coupling to the DC pole, a second cell connection terminal for coupling to the AC terminal, an energy storage element having a positive and a negative end, a first group of series connected semiconducting units in parallel with the energy storage element, where a junction between these forms one cell connection terminal, and a second group of series connected semiconducting units in parallel with the energy storage element and including a third semiconducting unit and a fourth semiconducting unit consisting of a number of unidirectional conducting elements including at least one unidirectional conducting element, where a junction between these forms a further cell connection terminal.

    ELECTRICAL SYSTEM WITH ARC FAULT DETECTION
    67.
    发明申请

    公开(公告)号:US20170082672A1

    公开(公告)日:2017-03-23

    申请号:US14862716

    申请日:2015-09-23

    Abstract: A unique electrical system includes a first electrical component and a second electrical component. A conductor electrically couples the first electrical component with the second electrical component. A sensor is constructed to sense an AC power flow in the conductor and output an AC signal proportional to the AC power flow. A band-pass filter is in electrical communication with the sensor and constructed to receive and filter the AC signal and to generate an AC voltage proportional on the AC signal. A controller is in electrical communication with the band-pass filter, and is operative to receive and sample the AC voltage. The controller is configured to execute program instructions to sum sequential AC voltage values received from the band-pass filter over a sample time period, and to determine whether an arc fault has occurred based on the summed AC voltage values.

    ULTRACAP-BASED SOLUTIONS FOR RIDE-THROUGH OF SYNCHRONOUS MACHINE DRIVES
    68.
    发明申请
    ULTRACAP-BASED SOLUTIONS FOR RIDE-THROUGH OF SYNCHRONOUS MACHINE DRIVES 审中-公开
    用于同步机器驱动的基于超声波的解决方案

    公开(公告)号:US20170063280A1

    公开(公告)日:2017-03-02

    申请号:US14839970

    申请日:2015-08-29

    CPC classification number: H02P29/025 H02J7/0068 H02J7/345 H02P9/10

    Abstract: A synchronous machine system comprising a synchronous motor including a stator, stator winding, rotor, and field winding; an AC power supply circuit structured to transmit current to or from the stator winding of the synchronous motor at a controlled frequency and transmit current to or from a power source at a controlled frequency; a DC exciter unit structured to receive power from a power source, convert the received power to DC power at a desired voltage, and supply the converted power across a DC bus to the field winding of the synchronous motor; and an energy storage circuit coupled to the DC bus of the DC exciter unit having at least one ultracapacitor, and structured to receive power from a power source, to charge the ultracapacitor, and to provide power to the field winding of the synchronous motor following a power failure.

    Abstract translation: 一种同步电机系统,包括同步电动机,其包括定子,定子绕组,转子和励磁绕组; AC电源电路,被设计成以受控的频率向同步电机的定子绕组传输电流或从受控频率的电源传输电流; 构造成从电源接收电力的DC激励器单元,将接收的功率转换为期望电压的直流电力,并将转换的功率通过DC总线提供给同步电动机的励磁绕组; 以及耦合到具有至少一个超级电容器的DC激励器单元的DC总线的能量存储电路,并且被构造为从电源接收功率,为超级电容器充电,并且向随后的同步电动机的励磁绕组提供功率 电源(检测)失败。

    CONTROL OF ELECTRICALLY EXCITED SYNCHRONOUS MACHINES DRIVES FOR RIDE THROUGH AND CONTROLLED BRAKING OPERATIONS
    69.
    发明申请
    CONTROL OF ELECTRICALLY EXCITED SYNCHRONOUS MACHINES DRIVES FOR RIDE THROUGH AND CONTROLLED BRAKING OPERATIONS 有权
    通过控制制动操作控制电动同步电机驱动

    公开(公告)号:US20170063277A1

    公开(公告)日:2017-03-02

    申请号:US14837620

    申请日:2015-08-27

    Abstract: One exemplary embodiment is method of operating an electrically excited synchronous machine (EESM) system. The system includes a converter operatively coupled with one or more stator windings, an exciter operatively coupled with one or more field windings, a controller operatively coupled with the converter and the exciter, and a power supply operatively coupled with the converter and the exciter. The controller determines whether a power supply fault condition exists and whether EESM system is operating in a motor mode or a generator mode. If the power supply fault condition exists and the EESM system is operating in the motor mode, entering one of a motor ride through control mode and a motor controlled braking control mode If the power supply fault condition exists and the EESM system is operating in the generator mode, entering one of a generator ride through control mode and a generator controlled braking control mode.

    Abstract translation: 一个示例性实施例是操作电激励同步电机(EESM)系统的方法。 该系统包括可操作地与一个或多个定子绕组耦合的转换器,与一个或多个励磁绕组可操作耦合的激励器,与转换器和激励器可操作耦合的控制器以及与转换器和激励器可操作耦合的电源。 控制器确定电源故障条件是否存在,以及EESM系统是否在电机模式或发电机模式下运行。 如果电源故障条件存在,EESM系统在电机模式下运行,则进入电机之一,通过控制模式和电机控制制动控制模式。如果存在电源故障条件,并且EESM系统在发电机中运行 模式,通过控制模式和发电机控制的制动控制模式进入发电机之一。

    Arrangement, method and computer program product concerned with tapping of power from a DC power line to an AC power line
    70.
    发明授权
    Arrangement, method and computer program product concerned with tapping of power from a DC power line to an AC power line 有权
    有关从直流电源线到交流电源线的电源的布置,方法和计算机程序产品

    公开(公告)号:US09531292B2

    公开(公告)日:2016-12-27

    申请号:US14897758

    申请日:2013-06-14

    Abstract: An arrangement for tapping power from a DC power line to an AC power line includes power transfer modules between two DC potentials, each including a first branch with a string of converter cells in parallel with a second branch including a capacitor and being connected to an AC phase. There is at least one control unit that controls the arrangement considering one or more of a) distributing appropriate AC and DC voltages in converter output voltages of all series connected modules, b) maintaining/setting cell capacitor voltages in specific range and allowing boost mode operation, c) performing possible balancing of the introduced capacitor and d) employing an alternate approach of using passive filters to mitigate low order harmonics.

    Abstract translation: 用于从DC电力线路到AC电力线的电力抽出的装置包括两个DC电势之间的功率传递模块,每个DC电势包括具有一串转换器单元的第一分支与包括电容器的第二分支并联连接到AC 相。 至少有一个控制单元,其考虑以下一个或多个控制装置:a)在所有串联连接的模块的转换器输出电压中分配适当的AC和DC电压,b)保持/设置单元电容器电压在特定范围内并允许升压模式操作 ,c)执行引入的电容器的可能平衡,以及d)采用使用无源滤波器以减轻低阶谐波的替代方法。

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