Decentralized Voltage Control of Boost Converters in DC Microgrids: Theory and Experimental Validation

This paper addresses the voltage regulation problem in DC microgrids supplying the so-called ZIP loads through boost converters. More precisely, we propose a decentralized differential passivity-based dynamic controller that relies solely on voltage and current feedback and guarantees the closed-loop stability against unknown loads by using a Krasovskii-type Lyapunov function. We also estimate a so-called feasible region of attraction, within which every closed trajectory satisfies the underlying physical constraints. Finally, extensive simulations and experimental validations confirm the effectiveness of the proposed controller, particularly its robustness against load variations.