A New Bi-directional DC-DC Converter for Fuel Cell Generation

Abstract:- In this paper, a new bi-directional dc-dc converter for fuel cell generation system is proposed to improve load response characteristic, because Fuel Cell has slow response characteristics for load variation. This bidirectional Converter interfaces the low voltage battery to the inverter dc link of fuel cell generation system. This converter works in boost mode when power flows from battery to high voltage side otherwise it works in buck. In this converter an active clamp snubber absorb the voltage surge across the turned off switched and also achieve the ZVS of all power switches during boost mode therefore it can operate at higher frequency, smaller size transformers and higher efficiency. The simulation results verify these advantages