Control of Interleaved DC-DC Boost Converter Based on Extended State Observer for Fuel Cell Application

Interleaved dc-dc boost converter (IBC) has been widely used in the fuel cell applications, due to the features of low current ripple, high efficiency and high reliability. In this paper, a voltage controller based on the extended state observer (ESO) is proposed for this converter, aiming to deal with the parameter uncertainties and the external disturbances (including the input voltage perturbation and load current disturbance). Within the proposed control, the uncertainties and disturbances are treated as the lump disturbance, which is estimated by the ESO and is then canceled in the control action in real time. The proposed controller shows strong robustness against the uncertainties and external disturbances, which is demonstrated by both the simulation and experiment results.