What could be the result of the prime mover speed is too high?

What could be the result of the prime mover speed is too high?

As a prime mover power increases a load angle of 90° is eventually reached. Beyond this point further increases in mechanical input power cause the electrical power output to decrease. The surplus input power acts to further accelerate the machine and it is said to become unstable.

Why the speed of the synchronous generator should be kept constant at synchronous speed?

Speed of synchronous generator should be constant at no or any load as speed is directly related to the frequency of voltage generated by generator and changing frequency can not be to tolerated in the electric supply system.

How do you control the speed of a synchronous generator?

However, with the invention of solid-state devices, the frequency of the current fed to the synchronous motor can be varied. We can control the speed of the synchronous motor by changing the frequency of the supply to the motor.

What is the maximum possible prime mover speed of synchronous generators on 50Hz grid?

50Hz ,6 poles, 1000rpm.

What is prime mover in synchronous generator?

Prime movers are mechanical machines that convert primary energy of a fuel or fluid into mechanical energy. They are also called “turbines or engines.” The fossil fuels commonly used in prime movers are coal, gas, oil, and nuclear fuel.

When speed is changed in a synchronous generator?

If the speed of the rotor rotation increases then the rate of change of electromagnetic fluxes increases and as well as the EMF across the stator bars increases the output voltage increases . If two alternators are connected in parallel then one will be the load of other one .

What is prime mover of generator?

In engineering, a prime mover is an engine that converts fuel to useful work. In locomotives, the prime mover is thus the source of power for its propulsion. In an engine-generator set, the engine is the prime mover, as distinct from the generator.