연료전지·이차전지 하이브리드 시스템의 양방향 DC-DC 컨버터 제어기 설계

Fuel cell power system is one of the most promising energy source for the alternative energy because it has unique advantages such as high energy density, no power drop during operation, and feasible to make compact size. However, due to very low response time, fuel cell is difficult to correspond drastic load change and start up operation. For solving this problem, fuel cell power system must include energy storage device such as Li-Ion battery or super capacitor. Therefore, bi-directional DC-DC converter must be required for this storage device and fuel cell-PCS control. This paper presents a fuel cell modeling and a controller design of the bi-directional DC/DC converter for fuel cell and battery hybrid system. And proposed control design has been verified with computer simulation and experimentation.