Robust control of interleaved boost converter with active disturbance compensation

Abstract

Nowadays, extensive research is conducted on interleaved DC-DC boost converters due to their ability to minimize current ripple and enhance fault tolerance. In this article, we present a control methodology that achieves effective output voltage regulation while demonstrating robustness against uncertainties in parameters, variations in the source supply voltage, and deviations in load. These objectives are achieved by developing an equivalent circuit model for the interleaved boost converter and formulating a linear representation using the exact linearization technique. Subsequently, trajectory tracking control strategies are employed, incorporating a sliding mode element to manage parameter uncertainties and compensate for disturbance errors. The controller, applied to the equivalent boost converter model, adjusts the duty cycle of each individual MOSFET command signal. This control mechanism utilizes the output voltage and the sum of the currents within the converter's branches as feedback variables. Experimental results illustrate the effectiveness and feasibility of the presented methodology.