WSEAS Transactions on Systems and Control
Print ISSN: 1991-8763, E-ISSN: 2224-2856
Volume 10, 2015
Nonlinear Controller Design for Maximum Power Tracking in Grid Connected Photovoltaic Systems
Authors: ,
Abstract: This work presents a new control method to track the maximum power point of a single-phase grid-connected photovoltaic (PV) system. This converter is built on two stages: a DC/ DC stage and a DC/ AC stage. The two blocks are bound by a DC voltage intermediate bus. We seek the achievement of three control objectives: (i) maximum power point tracking (MPPT) of (PV) module. (ii) tight regulation of the DC bus voltage and (iii) unity power factor (PF) in the grid. To meet these objectives, a multi-loop controller is designed using the backstepping technique based on an averaged nonlinear model of the whole controlled system. It is formally shown, through theoretical analysis and simulation results that the developed strategy control actually meets its objectives.
Search Articles
Keywords: photovoltaic system, maximum power point (MPP), boost converter, backstepping technique, unity power factor, lyapunov
Pages: 513-519
WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 10, 2015, Art. #56