Sliding Mode Control of Parallel-Connected DC-DC Buck Power Converters in DC Microgrid Systems

This paper presents a robust nonlinear sliding mode control (SMC) strategy for a set of parallel connected dc-dc buck power converters used in DC microgrid systems. This control strategy ensures both output voltage regulation and equal current sharing. The SMC strategy guarantees large signal stability of the system as well as provides a robust response performance against both line and load variations. MATLAB simulation and OPAL-RT real time simulator results are provided to verify the proposed control strategy.