Robust decentralized control of parallel DC/DC converters

A system of parallel operating DC/DC power converters is a multivariable plant. The controlled values in this case are the common output voltage and the relative amount of power delivered by each unit, also called the power sharing function. An optimal controller for this system is centralized due to the intermodular interaction. A decentralized controller is suboptimal but the realization of such a controller is simpler. Different structures of decentralized controllers were designed using the robustness and optimality criteria based on the structured singular value. The gain directionality compensation, due to a high condition number, was also considered.