Open AccessOperation of Current-fed Dual Active Bridge DC-DC Converters for Microgrid
Author(s) -
A. Geetha,
N.P. Subramaniam,
R. Gnanadass
Publication year - 2019
Publication title -
international journal of recent technology and engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-3878
DOI - 10.35940/ijrte.b2912.078219
Subject(s) - snubber , converters , microgrid , transformer , voltage , network topology , inductor , electrical engineering , electronic engineering , computer science , topology (electrical circuits) , capacitor , control theory (sociology) , engineering , operating system , control (management) , artificial intelligence
Dual Active Bridge (DAB) is an isolated bidirectional DC-DC converter, which comprises two full bridge converterslinked through a high frequency transformer. It haslow stresses and permits high frequency performance because of the soft-switching. All the switches in the converter achieves the turn ON & OFF during Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) to minimize switching loss. Generally, DAB is classified as two types, namely, voltage-fed and current-fed variants. At light load conditions, soft-switching is not realized in case of voltage-fed DAB topologies. The application of current-fed DAB converters is to reduce the losses at the time of switching under light load conditions and improves the efficiency. This paper describes the various topologies of voltage-fed and current-fed DAB used for different applications in microgrid and fuel cell energy generation system by using the simulation. The performance of voltage-fed and current-fed DAB with snubber-less converters are also demonstrated and their effectiveness are validated