By Paul M. Anderson, A. A. Fouad
Analyzes the dynamic functionality of interconnected strength systems.* Examines the features of a number of the elements of an influence process in the course of basic working stipulations and through disturbances.* Explores the special mathematical versions of approach parts and analyzes the procedure habit utilizing the required computational instruments.
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Additional resources for Power System Control and Stability (Ieee Press Power Engineering Series)
This subject will be dealt with in greater detail in Part III. 4 Electrical Torque In general, the electrical torque is produced by the interaction between the three stator circuits, the field circuit, and other circu its such as the damper windings. Since the three stator circuits are connected to the rest of the system, the terminal voltage is determined in part by the external network, the other machines, and the loads. The flux linking each circuit in the machine depends upon the exciter output voltage, the loading of the magnetic circuit (saturation), and the current in the different windings.
The procedure is outlined in detail in Chapter 10 of [8J. 5. 13. The time solution is carried out for two successive peaks of the angle o. 82 s, and the oscillation of the rotor angle () continues. For the system under study and for the given impact, synchronism is not lost (since the angle 0 does not increase indefinitely) and the synchronous machine is stable. 43) where P, is the accelerating power. 43) 20 d dt? )(2 dO) dt dt? 49) gives the relative speed of the machine with respect to a reference frame moving at constant speed (by the definition of the angle 0).
6 Representation or a synchronous machine by a constant voltage behind trans ient reactance. The constant voltage source Ell. • pretransient conditions . During the transient the magnitude E is held constant, while the angle 0 is considered as the angle between the rotor position and the terminal voltage V. 8 PF. Solution Using Vas reference. 2 pu. 6 E = Ell. 1314. This will be held constant during the transient, although 8 may vary. The initial value of 8. 13° . 24 Chapter 2 During the transient period, assuming that V is held constant, the machine power as a function of the angle 0 is also given by a power-angle curve.