Multi-MPC control of a solid oxide fuel cell system based on balanced decomposition

This paper studies the multi-MPC control of a typical solid oxide fuel cell (SOFC) system. As a potential generation technology, the SOFC system has a series of merits, such as clear and pollution-free, all solid state structure, quiet operation, high reliability, and so on. However, it is not easy to design a controller for the SOFC system, as it is nonlinear and complex. This paper analyzes its model characteristics in details and finds that the SOFC can be turned into a Hammerstein-Wiener system. Thus, the included angle can be applied to measure its nonlinearity and a balanced multi-model decomposition method is proposed for the SOFC system, and then the multi-MPC is employed to design a control for it. Simulations illustrate that the proposed decomposition method and the multi-MPC can obtain better closed-loop performance than other methods.