D18.3 - Online Full ZVS Optimization for Modular Multi-Active Bridge Converter in Mv Pet

Monday, March 23, 2026

12:00 PM - 1:30 PM CT

Location: Meeting Room Level, Park View Foyer

Technical Dialogue Presenter(s)

Haoyu Wang

The University of Texas at Austin

Presentation Paper

Co-Author(s)

JL

Junwei Liu

PolyU
JZ

Jialin Zheng

Purdue University
YZ

Yangbin Zeng

South China University of Technology
DM

Di Mou

Tsinghua University
Zian Qin

Delft University of Technology

Multi-active bridge (MAB) converters, the core of the state-of-the-art medium-voltage power electronic transformers, can flexibly connect multiple DC ports among distributed DC grids and loads, but suffer from hard switching under conventional single phase-shift control, especially under unbalanced voltage conversion ratios and light load conditions. Although some offline methods manage to improve the efficiency through complex optimization structures, there lacks online optimization methods that are simple but effective due to the strong coupling among ports of the converter. This paper simplifies the optimization process and proposes an online optimization method that can achieve full zero-voltage switching (ZVS) operation regardless of the load conditions. The proposed method has simple solutions with only voltage conversion ratios involved and can be implemented within a wide operation range without additional sensors or advanced controllers. The simulation and experimental results have verified the feasibility and superiority of the proposed online strategy in achieving ZVS operation, dynamic response, and efficiency improvement.