Voltage control of DC networks: robustness for unknown ZIP-loads

Autor:	Cucuzzella, Michele, Kosaraju, Krishna Chaitanya, Scherpen, Jacquelien M. A.
Rok vydání:	2019
Předmět:	Electrical Engineering and Systems Science - Systems and Control
Druh dokumentu:	Working Paper
Popis:	In this paper we propose a new passivity-based control technique for DC power networks comprising the so-called ZIP-loads, i.e., nonlinear loads with the parallel combination of unknown constant impedance (Z), current (I) and power (P) components. More precisely, we propose a novel passifying input and a storage function based on the so-called mixed potential function introduced by Brayton and Moser, leading to a novel passivity property with output port-variable equal to the first time derivative of the voltage. Differently from the existing results in the literature, where restrictive (sufficient) conditions on Z, P and the voltage reference are assumed to be satisfied, we establish a passivity property for every positive voltage reference and every type of load. Consequently, we develop a new decentralized passivity-based control scheme that is robust with respect to the uncertainty affecting the ZIP-loads. Comment: M. Cucuzzella and K. C. Kosaraju have given equivalent contribution
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1907.09973 Zobrazit plný text záznamu View this record from Arxiv