Three-phase synchronous generator blades

What is a 3 phase synchronous generator?

With the generator running at rated speed, gradually raise IX to IXn. 3-phase synchronous generator produces an open-circuit line voltage of 6928V when the DC exciting current is 50A. The AC terminals are then short-circuited, and the three line currents are found to be 800A winding resistance R= 0.02 pu. Calculate

What is a three phase generator?

In large generators, the field rotates, and the armature windings are on the stator. Three-phase is standard for utilities because it can be transmitted at a lower cost, and a three-phase generator is significantly smaller than a single-phase generator of the same rating.

How synchronous generator works?

In conventional synchronous generator, the rotor winding is injected by DC from a separate rectifying circuit known as exciter which converts AC from the grid into DC for the rotor. This kind of synchronous generator is called electrically excited synchronous generator, or wound field or wound rotor synchronous generator (WRSG) .

What is a 3-phase winding in a Sy chronous machine?

transferred to the external circuit as 3-phase voltages. Depending on their power and type, 3-phase windings of sy chronous machines can be located on the stator or rotor. In large power machines, three-phase windings are wound on a fixed stator to facilitate the process of transferring the generated power to the external circuit an

Can a synchronous generator be controlled?

Using an AVR for the excitation of the field voltage, the output voltage of the synchronous generator can be controlled. However, induction generators require controlled capacitors for voltage control. In addition, their operating speed should be over synchronous speed in order to operate in generating mode .

What is wound rotor synchronous generator (WRSG)?

Wound rotor synchronous generator (WRSG) is the workhorse of the electrical power industry and therefore very well documented in the literature [11–13]. Its stator windings are connected directly to the grid and hence the rotational speed is strictly fixed by the frequency of the supply grid.