This paper 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.
|Title of host publication||Proceedings of the 58th Conference on Decision and Control|
|Publication status||Published - 12-Mar-2020|
|Event||58th Conference on Decision and Control (CDC2019) - Nice, France|
Duration: 11-Dec-2019 → 13-Dec-2019
|Conference||58th Conference on Decision and Control (CDC2019)|
|Period||11/12/2019 → 13/12/2019|
- Power systems, Stability of nonlinear systems, Decentralized control