Q2. Suppose that a synchronous generator is connected to an infinite bus. Base frequency of the system is 50 Hz, the voltage of the infinite bus is 1.03 pu, the voltage of the machine is 1.01 pu, the rotor angle under equilibrium is 37.5°, the equivalent line reactance is 0.2945 pu. Find the oscillation frequency of the machine if it is subjected to small disturbances. (Take H=2.1) the voltage of the infinite bus is 1.03 pu voltage of the machine is 1.01 pu rotor angle under equilibrium is 37.5° equivalent line reactance is 0.2945 pu Take H=2.1 Base frequency of the system is 50 Hz You need to take these values into account with formulas.

Which of the following statements related to wind turbine types are true? Select one or more: a. The Savonius rotor will not start without an auxiliary motor b. In modern industrial-sized wind turbines, the most common type of turbine is a 3-bladed wind turbine. c. In a downwind turbine, the blades are on the (upper) side of the wind when viewed from the nacell

) A four-pole synchronous generator is spinning at a mechanical speed of 1500 r/min. What is the electrical frequency generated by the machine?

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.