If you were to be able to decrease the amount of regulation in an alternator, the voltage outputs would become unstable and probably ruin the battery or any devices that run directly from the alternator source. I am not saying that it will happen but it certainly would effect the systems in some way.
yes
change in voltage from no load to full load
To regulate the voltage flow going to the battery.
because the voltage should be constant as the full transmission grid need ame voltage for synchronization of alternatos of grid
Voltage flows from the alternator not to it. If it is outputting no voltage it is defective.
Regulation of an alternator is varying or adjusting the d.c. current flow (excitation current) in the revolving field coil to control the output voltage. When an alternator is subject to varying load conditions, and therefore changing load resistance at the output, the output voltage will vary in response. When output voltage is reduced in response to increased load (reduced output resistance), the "voltage regulator" will respond by increasing the excitation current to increase the voltage output. If load is reduced, the generator will momentarily become over-excited and the ouput voltage will increase. The voltage regulator responds by decreasing excitation current, returning the generator output voltage to its nominal level.
yes.. voltage regulation can be negative
Percent Regulation is the regulation expressed as a percentage is a figure of merit used to specify the performance of a voltage regulator.
The change in output voltage from no load to full load defines the voltage regulation of that transformer.
A transformer will operate with a voltage regulation of zero when it is not supplying a load.
formals to calculate exciation voltage of alternator
Output of the alternator is controlled by the voltage regulator.