公开(公告)号：US08111496B2

公开(公告)日：2012-02-07

申请号：US12379033

申请日：2009-02-11

申请人： Stephen A Long ,  David R Trainer ,  Lihua Hu ,  Huw L Edwards

发明人： Stephen A Long ,  David R Trainer ,  Lihua Hu ,  Huw L Edwards

IPC分类号： H02H3/22

CPC分类号： H02H9/08 ,  H02H7/268

摘要： An earthing arrangement for a DC electrical system (10), the electrical system (10) comprises a plurality of earthing points (24A, 24B, 24C) and each earthing point (24A, 24B, 24C) is directly and permanently connected to earth (26) by a high impedance connection (28A, 28B, 28C). Each earthing point (24A, 24B, 24C) is selectively connectable to earth (26) in electrical parallel with the high impedance connection (28A, 28B, 28C) by a solid connection (30A, 30B, 30C) and a switch (32A, 32B, 32C). In first mode of operation the switch (32A) between the earthing point (24A) and the earth (26) of only one of the plurality of earthing points (24A, 24B, 24C) is closed.

摘要翻译： 一种用于DC电气系统（10）的接地装置，电气系统（10）包括多个接地点（24A，24B，24C），并且每个接地点（24A，24B，24C）直接并永久地连接到地面 26）通过高阻抗连接（28A，28B，28​​C）。 每个接地点（24A，24B，24C）通过固体连接（30A，30B，30C）和开关（32A，24B，24C）可选择地连接到与高阻抗连接（28A，28B，28​​C）并联的接地（26） 32B，32C）。 在第一操作模式中，接地点（24A）和多个接地点（24A，24B，24C）中仅一个接地点（26）之间的开关（32A）闭合。

公开(公告)号：US07847431B2

公开(公告)日：2010-12-07

申请号：US12382391

申请日：2009-03-16

申请人： Lihua Hu ,  David R Trainer ,  Stephen A Long

发明人： Lihua Hu ,  David R Trainer ,  Stephen A Long

IPC分类号： H02J3/38 ,  H02J3/46

CPC分类号： H02P9/102 ,  H02P2101/30 ,  Y10T307/505 ,  Y10T307/718

摘要： Electrical power generation systems typically comprise an electrical power distribution arrangement in which a number of electrical power generators are coupled in parallel. In such circumstances in order to avoid conflict generally a first electrical power generator is controlled with a voltage controller while second electrical power generators have electrical current controllers. As loads are switched into and out of the electrical distribution system in normal operation the first electrical power generator and its voltage controller can accommodate voltage dynamics and therefore maintain a desired voltage. However, in order to accommodate heavier loads switching, the dynamic operation of the electrical current controller is achieved through utilizing operational voltage margins from a desired voltage as control signals to the electrical current controller. A threshold is provided above which the electrical voltage margin must operate and regimes are provided to determine continued increase or fall in the operational voltage to allow continued dynamic control of the electrical current in order that voltage stability can be re-established with regard to electrical power distribution arrangements.

摘要翻译： 电力发电系统通常包括电力分配装置，其中多个发电机并联耦合。 在这种情况下，为了避免冲突，第二发电机具有电流控制器，第一发电机由电压控制器控制。 当负载在正常操作中被切换进出配电系统时，第一电力发电机及其电压控制器可以适应电压动态并因此保持期望的电压。 然而，为了适应较重的负载切换，电流控制器的动态操作通过利用来自期望电压的操作电压余量作为对电流控制器的控制信号来实现。 提供了一个阈值，在该阈值之上，电压裕度必须运行并且提供方案以确定工作电压的持续增加或降低，以允许电流的持续动态控制，以便可以关于电功率重新建立电压稳定性 分销安排。

公开(公告)号：US08154260B2

公开(公告)日：2012-04-10

申请号：US12382392

申请日：2009-03-16

申请人： Lihua Hu ,  David R Trainer ,  Stephen A Long

发明人： Lihua Hu ,  David R Trainer ,  Stephen A Long

IPC分类号： F02B63/04

CPC分类号： H02P9/102 ,  H02P2101/30

摘要： Within generator systems maintenance of stability in terms of voltage is desirable. Generally, several generators will be arranged in parallel within the generator system with one generator voltage controlled to provide dynamic responsiveness to load switching. With regard to some loads which are generally of an active nature, the capacity of a first generator, which is voltage controlled, may be insufficient to adequately avoid transient voltage instability. By providing an actuator signal from a load to act as a pre-emptive or forward feed to an electrical current controlled generator, that second electrical current generator can be arranged to provide additional or reduced electrical current to avoid system voltage instability.

摘要翻译： 在发电机系统中，期望维持稳定的电压。 通常，几个发电机将在发电机系统内并联布置，一个发电机电压被控制以提供对负载切换的动态响应。 对于通常具有活性的一些负载，第一发电机的电压控制的容量可能不足以充分地避免瞬态电压的不稳定性。 通过提供来自负载的致动器信号作为对电流控制的发电机的先发或正向馈送，该第二电流发生器可被布置成提供附加或减小的电流以避免系统电压不稳定性。

公开(公告)号：US08125196B2

公开(公告)日：2012-02-28

申请号：US12458723

申请日：2009-07-21

申请人： David R Trainer ,  Thomas C J Feehally ,  Stephen A Long

发明人： David R Trainer ,  Thomas C J Feehally ,  Stephen A Long

IPC分类号： H02P9/00

CPC分类号： H02P9/04 ,  H02P2101/30

摘要： Utilisation of a number of electrical machines such as generators all driven by a common prime mover, such as a gas turbine engine, are known. However, faults in one phase of one particular electrical machine may cause torque vibration and therefore stressing to mechanical linkages between the electrical machine and the prime mover. By determining torque vibration and then utilising a second electrical machine to introduce an anti-phase torque vibration a substantially balanced and steady torque loading to the mechanical linkages can be achieved.

摘要翻译： 已知利用诸如燃气轮机之类的共同原动机驱动的发电机的电机如发电机。 然而，一个特定电机的一相中的故障可能导致扭矩振动，并因此引起电机和原动机之间的机械连接。 通过确定扭矩振动，然后利用第二电机引入反相扭矩振动，可以实现基本上平衡和稳定的扭矩负载到机械连杆。