Decoupled power flow using phase shift control and ZVS cases for a three limb high frequency transformer based three-port DAB integrating PV and energy storage

The work presented in this paper focuses on the decoupled power flow control using phase shift control technique and resulting ZVS scenarios for three-limb high frequency transformer enabled three port Dual Active Bridge(DAB) converter, integrating PV and Energy Storage(ES). The advantage of using three-limb transformer is the low inter-winding parasitic capacitances due to positioning of windings on different limbs and elimination of high insulation requirements unlike concentric windings. The focus of the paper is based on decoupled power flow control of three port DAB using phase shift control, and ZVS scenario study under the phase shift control. Detailed analysis for power flow control and turn-on/turn-off ZVS conditions have been realized. Detailed Simulation Studies have been done and comprehensive results have been obtained for 700V dc PV//ES voltage and 1200V dc output voltage.