A Simplified Modulation Strategy for Single-Phase Isolated Bidirectional High-Power-Factor Rectifiers Based on the Current-Fed Dual-Active-Bridge Topology

This paper presents a simplified control strategy for a Current-Fed Dual-Active-Bridge topology used as a single-phase isolated bidirectional high-power-factor rectifier for Vehicle-to-Grid (V2G) applications. The interleaved Boost input stage of this topology achieves perfect current ripple cancellation, which greatly simplifies the input filter requirements. The proposed control strategy allows to achieve high power factors with no need for input voltage or current sensing. Moreover, the modulation law is easily implemented in any microcontroller with minimum computational efforts. Experimental results taken on a 3 kW prototype confirm the theoretical expectations.