Excitation system of steam turbine generator

The utility model discloses a steam turbine generator excitation system, which comprises a generator, an excitation transformer, an excitation regulator, a rectification unit and a de-excitation unit, the output end of the generator is connected with the input end of the excitation transformer, and the output end of the excitation transformer is respectively connected with the input ends of the rectification unit and the excitation regulator. One line of the output end of the excitation regulator is connected with the rectification unit, the other line is supplied to a station service power supply, the output end of the rectification unit is connected with the field suppression unit, the field suppression unit is connected with a generator rotor, and a synchronous transformer is further arranged between the excitation transformer and the excitation regulator. Performance parameters of the excitation regulator are monitored in real time through the monitoring system, timely regulation can be carried out if fau