The main function of the excitation system is to supply AN-X2-AB-DHRIO power to the excitation winding of the synchronous motor, and its effect on the synchronous motor can be reflected in the following aspects:

(1) Adjusting excitation can maintain a constant voltage.

(2) It can enable the rational distribution of reactive power among various units.

(3) By adopting a complete excitation system and its automatic adjustment device, the transmission power limit can be increased

(4) When a short circuit occurs, forced excitation is beneficial for improving dynamic stability.

(5) During transient processes, the behavior of synchronous motors largely depends on the performance of the excitation system.