power-factor swing

The results of case study show that WFR has excellent performance in oscillation information analysis for both smooth and non-smooth signals, suitable for the that of power system swing curves.

算例说明，WFR不仅可以分析平稳信号的振荡信息，对于非平稳信号同样具有良好性能，更适合电力系统摇摆曲线的振荡信息分析。

Though a bipolar device has high analog precision and great drive power, it has the problem of thermal swing.

先介绍了一种双极型过温保护电路，虽然这种电路模拟精度高，驱动能力强，但电路本身存在热振荡问题。

It all depends on racquet power profile and how fast you can swing.

一切都取决于球拍的威力特征和你能以多快的速度挥拍.

So the time of Ucos φ detecting three-phase short-circuit fault in power swing process is shortened, and the performance of whole protective device is improved.

因此可以大大缩短Ucosφ作为电力系统振荡过程发生三相短路判别元件的动作时间，提高整套保护的性能。

The utility model belongs to a wind motor, in particular to a swing-arm type high-power wind motor capable of being matched with a generator and other machineries.

本实用新型属于风力发动机，特别是指一种可与发电机和其它机械配套的旋臂式大功率风力发动机。