Influence of the Mission Profile on the Selection of the Leakage Inductance for Dual Active Bridge Converter

Abstract

The Solid-State Transformer (SST) is a key technology to support the massive deplyment of Renewable Energy Sources (RES) and the electrification of several sectors. The Dual Active Bridge (DAB) is a promising topology to be used in Medium Voltage DC (MVDC) networks. However, depending on the modulation and the voltage ratio range, the DAB can present high reactive power and low efficiency at light loads. The leakage inductance is a key design parameter to optimize the overall converter performance. This paper presents a methodology to choose the leakage inductance for four mission profiles (PV, EV, residential and commercial) based on proposed weighted duration coefficients. The methodology considers a DC voltage variation and the change in reactive power and ZVS zones. The results show that the leakage inductance and the MFT design are different for profiles that operate mostly at low powers, such as EV.

Adriana Campos, Piotr Dworakowski, Besar Asllani, Konstantin Vershinin

Presented at EPE 2025