Advanced Control Design of Interleaved Boost Converter for Fuel Cell Applications

The power converters can play an important role in fuel cell systems, and robust control design of the converters can improve both the system efficiency and stability. In this paper, an advanced control strategy of a two-phase interleaved boost converter for fuel cell applications is proposed and implemented, which consists of the outer voltage regulation loop and the inner current tracking loop. The current inner loop is designed based on the Super-Twisting sliding mode control to track its reference current tightly. The active disturbance rejection control (ADRC) is applied to the voltage outer loop to regulate the output voltage and generate the reference current for the inner loop. The stability of the control loops is proved through the Lyapunov stability theory and Routh-Hurwitz criteria. Finally, the effectiveness of the proposed control strategy is demonstrated by numerical simulation results, which indicates that strong robustness can be achieved when compared with traditional dual-loop PI controller.