Robust control of multi-phase interleaved boost converters in the presence of perturbations and open phase fault

摘要

In this paper, robust control of interleaved boost converters is studied under load and supply voltage perturbations and open phase fault. First, a new decentralised proportional-integral adaptive sliding mode control strategy is developed for the interleaved boost converters. In this status, each phase of the converter operates separately and the proportional-integral controller generates needed reference current from the voltage tracking error. Second, a novel proportional-integral adaptive sliding mode control method based on master-slave strategy is proposed. In this strategy, one phase of the converter acts as the master and the other phases act as the slaves. The master phase controls the voltage and others are responsible for their currents separately. However, the reference current is provided by average value of the converter phase currents. The adaptive gains of the proposed control methods are able to estimate the related perturbations without any prior knowledge. Comparative MATLAB/SimPower simulations are carried out on a three-phase IBC to show the effectiveness of the proposed control strategies in the presence of load and supply voltage perturbations and open phase fault. Moreover, the tracking capability of both methods is verified by the simulations.