Abstract
In this paper, a three-port converter with three active full bridges, two series-resonant tanks, and a three-winding transformer is proposed. It uses a single power conversion stage with high-frequency link to control power flow between batteries, load, and a renewable source such as fuel cell. The converter has capabilities of bidirectional power flow in the battery and the load port. Use of series-resonance aids in high switching frequency operation with realizable component values when compared to existing three-port converter with only inductors. The converter has high efficiency due to soft-switching operation in all three bridges. Steady-state analysis of the converter is presented to determine the power flow equations, tank currents, and soft-switching region. Dynamic analysis is performed to design a closed-loop controller that will regulate the load-side port voltage and source-side port current. Design procedure for the three-port converter is explained and experimental results of a laboratory prototype are presented.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2289-2297 |
| Number of pages | 9 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 24 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2009 |
Bibliographical note
Funding Information:Manuscript received December 11, 2008; revised March 21, 2009. Current version published September 2, 2009. This work was supported by Institute of Renewable Energy and Environment (IREE), University of Minnesota under Grant LG-C9-2005. Recommended for publication by Associate Editor S. Choi.
Keywords
- Bidirectional power
- Phase-shift control at constant switching frequency
- Series-resonant converter
- Soft-switching operation
- Three-port converter
- Three-winding transformer
