Excitation of automatic adjustment refers to the generator field current adjusted according to the change of the voltage of the machine according to the predetermined requirement, in order to maintain voltage for a given value.So can automatically adjust the excitation system as a modulated by voltage negative feedback control system.Of synchronous generator excitation control method can be divided into according to voltage deviation adjustment and according to the stator current, power factor compensation adjustment of the two.Here mainly introduce according to voltage deviation adjusting method.

Excitation regulator basic block diagram

     In order to adjust the synchronous generator terminal voltage Vf,, should measure the change of the terminal voltage value.In order to facilitate measurement, set up the terminal voltage transformation organs, so measuring the output voltage of a body directly proportional klVf and Vf.The synthesis of more comprehensive point differential voltage delta V = V2 - klVf when the terminal voltage is on the high side, delta V is negative, the terminal voltage on the low side, delta V is positive.Amplification mechanism carried out in accordance with the size and direction of the delta V amplifier, through the exciting current flow to the corresponding actuator direction adjustment, to control the voltage of the generator.

     Excitation regulator organic type, electromagnetic type and semiconductor type.Today's digital excitation regulator (microcomputer excitation regulator).