Modeling and simulation of grid connected solid oxide fuel cell using PSCAD

Solid oxide fuel cell (SOFC) is being developed for a wide variety of applications because of their high efficiency, reliability, and fuel adaptability. In this paper, a grid connected SOFC system is presented by using PSCAD software. The power conditioning unit (PCU) is used for simulation studies and also the transformer is used for electrical isolation. The simulation studies of the SOFC dynamic model are investigated for three case studies. In the first simulation study, the SOFC dynamic model is connected to constant and variable DC loads without PCU. The second simulation study is performed for three phase AC load conditions. The AC performance of SOFC is tested under an AC load through the transmission line of 400 V at the length of 10 km. The last simulation study is implemented for the grid connected SOFC system. In the grid connected case study, a three bus system, which includes an infinite bus, a load bus and a fuel cell bus, is formed under AC load conditions. The results show the fast response capabilities of the grid connected SOFC system in different case studies and various load types.