Dual-Mode Predictive Control of Solid Oxide Fuel Cell

Abstract

It is one of the most frequently stated problems for solid oxide fuel cell (SOFC) system with rated load that output voltage should be kept constant under the fuel utilization rate constraint. Dual-mode predictive control is one of the most popular approaches in process control due to its outstanding advantages such as handling constraints and ensuring close-loop stability. Based on the identified model at the rated load operating point, a dual-mode predictive controller was designed for the SOFC system. However, steady state error was unavoidable in the output because of the identification error. To this end, an integral term was introduced into the augmented model. Simulation results show that the proposed dual-mode predictive controller with integral action in this paper can eliminate the steady-state error under the fuel utilization rate constraint.