Instantaneous power output of a single phase 60 Hz generator will not be constant only under following condition: O A. The load draws only real power. O B. The load draws only reactive power. O C. None of the other choices are correct O D. The load is unbalanced. O E. The load draws bothreal and reactive power.

A synchronous generator having ratings of 100 MVA operates on a full load at a frequency of 50 Hz. The load suddenly reduced to 60 MVA. The steam valve begins to close after 0.7 second due to time lag in the governor system. What would be the change in frequency that occurs in this time. Use generator capacity of H = 4 kW-s/kVA. Answer Choices: a. 1.72 Hz b. 1.02 Hz c. 1 Hz d. 0.72 Hz

If the load is connected to the generator thgrough an inductive line and the voltage at the load side is the same as the voltage at the terminals of the generator, which of the following must be true? O A. The reactive power is flowing from the generator to the load and from load to the generator at the same time. O B. The load is disconnected, and no power is delivered to the load. O C. The load has a poor power factor and it's absorbing too much reactive power. O D. None of the other choices are correct O E. The generator is unable to produce reactive power; therefore, the reactive power is flowing from the load to the generator.

A synchronous generator is rated 645 MVA, 24 kV, 0.9 pf lagging. It has a synchronous reactance 1.2 . The generator is feeding full load at 0.9 pf lagging at rated voltage. Calculate: (a) Excitation emf (E,) and power angle 8 (b) Reactive power drawn by the load Carry out calculations in pu form and convert the result to actual values.

Draw a complete equivalent circuit of one phase only of a synchronous generator. Then draw the phasor diagram for a unity power factor. Assume the phase resistance is ignored

There are only two generators in a power system, and these generators supply a total load of 10 MW. The no-load frequencies and droop constants for the generators are 51 Hz, 0.5Hz/MW, and 52 Hz, 1Hz/MW, respectively. What is the frequency of the combined system? What are the powers produced by individual generators? At this loading condi- tion, if the generator 1 is delivered to producc equal amount of power as the generator 2, what should be the no-load frequency of the generator 1?

If the load draws a current of 2727 A, in phase, from a generator, which of the following statement is true? O A. The reactive power is flowing from generator to the load and the real power is flowing from the load to the generator. O B. Since the current is in phase with the generator voltage, both the real and reactive power is flowing from the generator to the load. O .Since the current is leading the generator, both the real and reactive power is flowing from the load to the generator. O D. The real power is flowing from generator to the load and the reactive power is flowing from the load to the generator. O E. None of the other choices are correct