电力英文翻译

Question

Three -phase- to -ground fault applied for five cycles
In order to demonstrate that the proposed control strategy does not adversely affect the transient stability under a heavy disturbance, a three-phase short circuit of negligible impedance was created and removed after a longer fault duration of 100 ms. The fault was applied while transmitting a power of 125 MW at a power factor of 0.90 lag.
Fig. 6a shows change in speed variation for this three-phase fault with and without the proposed control. It is seen that the originally unstable system(shown by the increasing oscillations) is damped within a few cycles of the dynamic oscillation even under this strenuous condition. The corresponding control signal is shown, in Fig. 6b. The main reason for the relatively large damping time in this instant is that the control signal has been limited to 1 pu and takes a few seconds to come-out of saturated behaviour.
Fig. 6c shows the dc current control and Fig. 6d and e show the corresponding variations of at at the rectifier and γ at the inverter. These signals taken together with the dc current show that there will not appear any commutation failure.
Since the system would be anyway unstable for a three-phase fault at full rated load even in the presence of a controller, this situation was not considered as indicative of the proper functioning of the controller under dynamic stability conditions.
要是用软件在线翻译的就不用了 谁要懂得专业英文帮看下 非常感谢
请不要用在线翻译应付....谢谢

Answer 1

三相线到和地线之间的故障申请五个工作日。
为了证明所提出的控制策略在严重骚扰情况下并不朝坏的方向影响电力系统暂态稳定性,一个可以被忽略的三相短路阻抗被加上，并在故障持续100毫秒后移除。故障出现时的电力传送功率为125兆瓦，功率因数为0.90。
图6a显示了这种三相电力系统在有无该控制策略时的故障变化速率。可以看出，起始的不稳定系统（图中显示增加了振荡）在经过一些动态振荡周期后被抑制（也就是阻尼振荡），甚至在非常苛刻的条件下是如此。图6b显示其控制信号响应。在这种响应中引起相对大的阻尼时间的主要原因是因为控制信号被限制到了1PU，需要好几秒才能出现饱和行为。
图6C 显示的是直流控制，图6D 显示的是在整流侧和逆变器Y端的响应变化。这些信号连同直流显示出不会出现通讯中断。
因为三相系统故障系统在满载下总是不稳定，尤其在目前的单控制器情况下，控制器在动态稳定条件正确指示其功能，这种情况不需要考虑。

Answer 2

3步-背景故障申请五个周期
为了表明所提出的控制策略并不影响电力系统暂态稳定在沉重的干扰,三相短路阻抗的微不足道的产生和移除后,再故障时间100女士。故障时的传输功率适用于一个功率因数的125千瓦的0.90滞后。
图中显示变化。安培为这三相断层速度变化和无所提出的控制。这就是那地,见那本来不稳定的系统(所表现出的日益振荡)是在几个周期的阻尼振动下的动态情况甚至艰辛。相应的控制信号显示,在图译林出版社。主要的原因,在这个时间相对较大的阻尼的瞬间,控制信号被限制到1蒲和需要几秒come-out饱和的行为。
图6摄氏度的直流电流控制与显示无花果。一维和e显示相应的变化,在整流器和γ的逆变器。这些信号被连同直流电流显示没有出现任何变换失败。
该系统将无论如何不稳定的三相故障时,即使在额定载荷的控制器,这种情况并不视为象征的正常运转的控制器的动态稳定性条件

Answer 3

吴先生的翻译很好

Answer 4

厄...看不懂