Generic Exciter System Operation

The excitation system regulates the terminal voltage of the synchronous machine. It allows users to regulate the voltage at the terminals of the machine, or on the high-voltage side of the step-up transformer. This regulation is done by varying the field voltage Efd based on the difference between the desired user reference voltage Vref and the actual voltage ex_Vtreg. The signal Vstab from the stabilizer can be added to this regulation loop. The excitation system is composed of two systems, a voltage regulator and the exciter. The field voltage Efd is limited between ex_Vrmin and ex_Vrmax, based on the voltage to be regulated.

Generic Exciter Block Diagram