Standalone DC microgrids as complementarity dynamical systems: Modeling and applications. (February 2015)

• Record Type: Journal Article
• Authors: Dizqah, Arash M.; Maheri, Alireza; Busawon, Krishna; Fritzson, Peter
• Is Part Of: Control engineering practice. Volume 35(2015)
• Page Start: 102
• Page End: 112
• Publication Date: 2015-02
• Subjects: Nonlinear model predictive control (NMPC) -- Wind energy -- Photovoltaic (PV) -- Lead-acid battery -- Modelica -- Maximum power point tracking (MPPT); Automatic control -- Periodicals; 629.89
• DOI: 10.1016/j.conengprac.2014.10.006
• Languages: English
• ISSNs: 0967-0661

Abstract

Abstract: It is well known that, due to bimodal operation as well as existent discontinuous differential states of batteries, standalone microgrids belong to the class of hybrid dynamical systems of non-Filippov type. In this work, however, standalone microgrids are presented as complementarity systems (CSs) of the Filippov type which is then used to develop a multivariable nonlinear model predictive control (NMPC)-based load tracking strategy as well as Modelica models for long-term simulation purposes. The developed load tracker strategy is a multi-source maximum power point tracker (MPPT) that also regulates the DC bus voltage at its nominal value with the maximum of ±2.0% error despite substantial demand and supply variations.