This work deals with the design of a robust and decentralized passivity-based control scheme for regulating the voltage of a DC microgrid through boost converters. A Krasovskii-type storage function is proposed and a (local) passivity property for DC microgrids comprising unknown 'ZIP' (constant impedance 'Z', constant current 'I' and constant power 'P') loads is established. More precisely, the input port-variable of the corresponding passive map is equal to the first-time derivative of the control input. Then, the integrated input port-variable is used to shape the closed loop storage function such that it has a minimum at the desired equilibrium point. Convergence to the desired equilibrium is theoretically analyzed and the proposed control scheme is validated through experiments on a real DC microgrid.
@article{arxiv.1902.10273,
title = {Robust Passivity-Based Control of Boost Converters in DC Microgrids},
author = {Michele Cucuzzella and Riccardo Lazzari and Yu Kawano and Krishna C. Kosaraju and Jacquelien M. A. Scherpen},
journal= {arXiv preprint arXiv:1902.10273},
year = {2019}
}