Control Strategy of the Shaft-driven Generator Based on the PWM Converters

The traditional shaft generator with the thyristor inverter runs on a synchronous generator for compensating the var. A novel marine shaft-driven generator system with two PWM converters is introduced. In this system, one PWM converter is used to convert the varying into the DC energy, the other PWM converter converts the DC energy into AC energy with the fixed frequency and voltage. Based on space vector control, this system maintains the constant voltage and constant frequency of generator and supplies effective power and reactive power to load in ship without the synchronous compensator.