The automatic voltage regulator is used to
Working Principle of Voltage Regulator
It works on the principle of detection of errors. The output voltage of an AC generator obtained through a potential transformer and then it is rectified, filtered and compared with a reference. The difference between the actual voltage and the reference voltage is known as the error voltage. This error voltage is amplified by an amplifier and then supplied to the main exciter or pilot exciter.
Application of the Automatic Voltage Regulator
The main functions of an AVR are as follows: