Conference paper
Partial Parallel Dual Active Bridge Converter with Variable Voltage Gain for SOEC/SOFC System
Fuel cells are becoming one of the promising devices in distributed generation (DG) systems due to their modularity, low or zero pollution and dispatchability. As one of the fuel cell technologies, solid oxide electrolysis cell / solid oxide fuel cell (SOEC/SOFC) has gained more and more attention owing to their relatively high efficiency.
However, design of the interface system for SOEC/SOFC is challenging because of the current-dependent and low stack voltage, the slow cell dynamics and transient response, and the asymmetrical power characteristic of SOEC/SOFC. In this paper, a self-circulating modulation (SCM) is proposed for the partial parallel dual active bridge (P2DAB) converter.
The SCM makes the voltage gain of the P2DAB converter variable, given the inherent high voltage gain characteristics of the topology itself, the P2DAB converter with SCM can thereby address the current-dependent and low stack voltage issues of SOEC/SOFC. Moreover, by using a SOFC-Parallel-SOEC-Series interface architecture, the asymmetrical power characteristics of SOEC/SOFC do not degrade the efficiency of the P2DAB converter.
Finally, the analysis of the proposed SCM is verified on a 1MHz, 500W, 400V/50V, GaN-based P2DAB converter.
Language: | English |
---|---|
Publisher: | IEEE |
Year: | 2019 |
Pages: | 1641-1646 |
Proceedings: | 2019 IEEE Applied Power Electronics Conference and Exposition |
ISBN: | 1538683296 , 153868330X , 153868330x , 1538683318 , 9781538683293 , 9781538683309 and 9781538683316 |
ISSN: | 10482334 and 24706647 |
Types: | Conference paper |
DOI: | 10.1109/APEC.2019.8721864 |
ORCIDs: | Xiao, Yudi , Zhang, Zhe and Andersen, Michael A. E. |
Bridge circuits Computer architecture Fuel cells GaN-based P<sup>2</sup>DAB converter High-voltage techniques III-V semiconductors Microprocessors SCM SOEC-SOFC system SOFC-Parallel-SOEC-Series interface architecture Topology Windings asymmetrical power characteristic bridge circuits current-dependent stack voltage issues dispatchability distributed generation systems distributed power generation dual active bridge electrolysis frequency 1.0 MHz gallium compounds high voltage gain characteristics nitrogen compounds partial parallel dual active bridge converter power 500.0 W power converter self-circulating modulation slow cell dynamics solid oxide electrolysis cell/solid oxide fuel cell solid oxide fuel cells transient response variable voltage gain voltage 400.0 V voltage 50.0 V zero pollution