Work

Hybrid modulation strategy for minimizing backflow power under dual phase shift modulation

Year: 2025

Type: article

Abstract: The dual active bridge (DAB) converter plays a pivotal role in DC microgrid applications due to its ability to provide galvanic isolation, enable high-power-density operation, and facilitate bidirectional power transfer. However, under voltage-mismatch conditions, single-phase-shift(SPS) modulation results in significant backflow power, which adversely impacts the converter's operational efficiency. Although KKT conditions-based optimization effectively minimizes backflow power, its direct application to dual-phase-shift (DPS) modulation creates power-vacancy region, limiting global optimization across the full power range. This paper proposes a novel DPS modulation strategy that: establishes an intuitive two-dimensional power-transfer plot under DPS modulation, andselects optimal operational paths in power-vacancy region.Experimental results demonstrate that under light-load conditions, the proposed minimum-backflow-power hybrid modulation strategy achieves remarkable reductions in backflow power compared to SPS and traditional DPS (TDPS) methods. The strategy completely eliminates power-vacancy region, enabling comprehensive backflow optimization across the entire power range.

Source: Energy Reports

DOI: 10.1016/j.egyr.2025.11.069

Authors: Xiaoqian Yue, Fei Yu, Jiaming Qi, Haoyang Xue, Xinrui Pei

Institution: Naval University of Engineering

Language: English

Topic: Advanced DC-DC Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $3,040