Reactive Power Controller for Single Phase Dual Active Bridge DC–DC Converters

In this study, we have proposed a triple-phase shift power-level controller (TPSPC) that achieves zero reactive power generation by fundamental components in a single-phase dual active bridge (DAB) DC-DC converter. The proposed power controller efficiently controls the active and reactive powers independently. The TPSPC regulates the phase shifts between the two H-bridges and inner phase shifts within each bridge to effectively eliminate the reactive power of the fundamental components in the converter. This elimination significantly decreases the inductor current across all load conditions without requiring a multiple mode analysis for the different operational states or any overly complex control functions. Unlike dual-phase shift power-level controllers, the TPSPC uniquely manages each phase shift independently, reducing the inductor current and significantly enhancing the performance. The versatile TPSPC methodology demonstrated in this study is promising for various DAB applications, such as aerospace systems, hybrid electric vehicle charging systems, and the asynchronous interconnection of micro-grids.