Control Strategy of Dual Phase Shifting Dual Active Bridge Converter Based on BM

Dual Active Bridge (DAB) converters are pivotal in renewable energy, electric vehicles, and energy storage systems due to bidirectional power transfer, galvanic isolation, and zero-voltage switching capabilities. While Silicon Carbide (SiC) devices enhance efficiency through reduced conduction losses and high-frequency operation, conventional SinglePhase-Shift (SPS) control under non-unity voltage ratios induces excessive circulating power and current stress, degrading system efficiency and reliability. The Brayton-Moser (BM) form provides a powerful nonlinear control method through energy-based port Hamiltonian system modeling. To address the aforementioned issues, this study proposes an enhanced Brayton-Moser theory-based nonlinear control strategy integrated with Dual-Phase-Shift (DPS) modulation and minimum circulating power optimization. To enhance system performance under passive conditions and optimize efficiency, a Brayton-Moser theory-guided DAB-based DC power conversion system has been architected and experimentally substantiated via simulation platforms.