PARALLEL OPERATION SYSTEM OF FUEL CELLS

摘要

PROBLEM TO BE SOLVED: To provide a parallel operation system of fuel cells for obtaining AC power of a large capacity. SOLUTION: DC-AC inverters connected to fuel cells FCs and AC output terminals 131-431 are connected with lines 141-441 through relay switches RY2 a-RY2d. And, input terminals 132-432 of commercial power supplies are connected to joints 141a-441a of the lines 141-441 with lines 142-442 through relay switches RY1a-RY1d. While the DC-AC inverters are operated, the relay switches RY2a-RY2d are in an on state and the relay switches RY1a-RY1d are in an off state. While the DC-AC inverters are not operated, the relays RY2a-RY2d are in an off state and the relay switches RY1a-RY1d are in an off state. Fuel cell power supply devices 100-400 of such a structure are connected by a daisy chain method with dedicated cables 500-700 with joints 141b-441b used as connections.