A three phase, 50 Hz, 4800V, 6 pole Y-connected synchronous generator connected to an infinite bus (constant voltage at 4800V) and has synchronous reactance of 202 per phase and negligible armature resistance. The generator is delivering 1 MW at a power angle of 30° . Calculate the following 1. Output torque of the generator 2. Excitation voltage E. 3. Armature current

A 13.8-kV 10-MVA 0.8-PF-lagging 60-Hz two-pole Y-connected steam-turbine generator has a synchronous reactance of 12 2 per phase and an armature resistance of 1.5 2 per phase. This generator is operating in parallel with a large power system (infinite bus). (a) What is the magnitude of E, at rated conditions? (b) What is the torque angle of the generator at rated conditions?

A six-pole, 30-slot dc commutator generator has a lap wound Armature winding. The armature constant, Ka is 9.55.The generator is operated with a separately excited field such that the field flux per pole is 0.04 weber/pole. The generator is driven at a speed of 3000 rpm. The no load armature voltage is 418.9 V. The above generator is now operated as a motor. The flux is 0.04 weber/pole. It is desired to supply a load requiring a Torque of 50 n–m at 4000 rpm. Armature circuit resistance is 0.075 ohm. Calculate (a) the back emf, (b) the required armature current and voltage to supply this load.