Modeling and simulation of combinable AC source based on SiC MOSFET

A comprehensive model of combinable single-phase source based on SiC MOSFET for the Electrical Power System (EPS) of helicopter ground support is investigated in this paper. This model is composed of three parts which has the ability to output single-phase 115 V/400 Hz for the EPS architecture under study. The double loop control is adopted in the primary part of ‘the three-phase Voltage Source PWM Rectifier (VSR)’. In the second part, ‘Dual Active Bridge (DAB) DC-DC converter’ is accomplished by phase shifting control. And ‘single-phase voltage source PWM inverter (VSI)’ is accomplished by droop control in the tertiary part. This comprehensive model can be operated in parallel to expand the output power of single-phase AC source. Furthermore, three-phase AC source is obtained by star connection scheme of output port. The simulation results based on Matlab/Simulink show that the parallel single-phase AC source model can meet the output power requirement; more significantly, it can share the output active/reactive power quickly. In addition, the three-phase AC sources model has an ability to resist load imbalance.