Derive the formula for the 3 phase power produced by the generator in terms of the power angle δm, |V |, |E|, and Xs. (δm is the angle between E and V ). (b) The power angle δm = 30 degrees . Calculate the 3 phase real power delivered to the
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
A 3 phase synchronous generator has a synchronous reactance Xs of 9 Ω per
phase, a no-load line to neutral AC voltage E of 12 kV and a line to line terminal
voltage of V of 17.3 kV.
(a) Derive the formula for the 3 phase power produced by the generator in terms of
the power angle δm, |V |, |E|, and Xs. (δm is the angle between E and V ).
(b) The power angle δm = 30 degrees
. Calculate the 3 phase real power delivered to the
grid at the terminals of the generator.
(c) The real power increases when the power angle δm increases, but there is a
maximum possible theoretical power that the generator can produce. Calculate the
maximum 3 phase real power.
Solve A-C
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