Efficiency investigation of 2L-DAB and ML-DAB for high-power PV applications
Paper in proceedings, 2018

This paper presents a comparison between efficiencies of the conventional two-level Dual-Active-Bridge (2L-DAB) and the Multi-Level Dual-Active-Bridge (ML-DAB) DC-DC converters for solar applications. A semiconductor chip-area-based comparison is employed to have a fair comparison between the two topologies. The definition of average efficiency for the European solar mix is utilized to make a comparison specific for a solar application. The rated power of the converters is 1 MW, and the switching frequency is swept from 10 kHz to 80 kHz to investigate its effect on the efficiencies of the converters. It has been shown that for a same amount of investment on the semiconductors, the 2L-DAB outperforms the ML-DAB both from efficiency and an operating junction temperature point of view. It has also been demonstrated that, by less than 70% more investment on the semiconductors, the efficiency of both converters can be increased by at least 0.7% while the operating junction temperature of the MOSFETs can be reduced by 50°C.

chip area comparison

DC-DC converter

two-level dual active bridge

PV application

multi-level dual active bridge

Author

Babak Alikhanzadehalamdari

Chalmers, Electrical Engineering, Electric Power Engineering

Amin Bahmani

Chalmers, Electrical Engineering, Electric Power Engineering

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering

2018 Thirteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)

Vol. 21 May 2018 1-6

2018 Thirteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
Monaco, France,

Subject Categories

Energy Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

Areas of Advance

Energy

DOI

10.1109/EVER.2018.8362340

More information

Latest update

1/17/2019