Dynamic Modeling of a Parallel-Connected Solid Oxide Fuel Cell Stack System

摘要: This study proposes novel simulation methods to model the power delivery function of a parallel-connected solid-oxide-fuel-cell stack system. The proposed are then used investigate possible thermal runaway induced by performance mismatch between employed stacks. A challenge in this modeling is achieve same output voltage but different current for each stack. Conventional fuel-cell models cannot be used, because they employ fuel flow rates and currents as input variables. These two variables unknown systems. method solves aforementioned problems integrating supply dynamics with conventional arranging them multiple-feedback-loop configuration conducting simulations. results indicate that can transient response Moreover, distribution, there exists an unstable positive feedback loop stacks when temperatures low, stable negative high. could initiated temperature slower than distribution.