UNITIZED REGENERATIVE FUEL CELL SYSTEM FOR TUNNEL AND METHOD FOR CONTROLLING THE SAME

Disclosed is a unitized regenerative fuel cell system, comprised of a unitized regenerative fuel cell able to operate in a fuel cell mode for electric power generation and in a water electrolysis mode for hydrogen and oxygen production, and a plurality of fire-detecting sensors for detecting fire in each zone of a tunnel, and configured to supply oxygen to zones wherein fire has not occurred if occurrence of fire has been detected in a tunnel, and a method for controlling the same.