Boost-buck inverter variable structure control for grid-connected photovoltaic systems

Author

Meza, Carlos ; Biel, Domingo ; Martínez, Juan ; Guínjoan, Francesc

Author_Institution

Inst. of Ind. & Control, Univ. Politecnica de Catalunya, Barcelona, Spain

fYear

2005

fDate

23-26 May 2005

Firstpage

1318

Abstract

The present work describes the analysis, modeling and design of a power conditioning system for grid-connected photovoltaic (PV) systems. The designed power stage consists of a transformerless boost-buck converter. The power conditioning system´s control scheme includes a variable structure controller to assure output unity power factor. To maximize the steady-state input-output energy transfer ratio a linear controller is designed out of a large-signal sampled data model of the system. The achievement of the DC-AC conversion and the efficient PV´s energy extraction are validated with simulation results.

Keywords

DC-AC power convertors; invertors; photovoltaic power systems; power factor correction; variable structure systems; DC-AC conversion; PV energy extraction efficiency; energy transfer ratio maximization; grid-connected photovoltaic systems; linear controller; power conditioning system; steady-state input-output energy transfer ratio; string inverter topology; transformerless boost-buck converter; unity power factor controller; variable structure control; Control systems; Data models; Energy exchange; Inverters; Photovoltaic systems; Power conditioning; Power system modeling; Reactive power; Solar power generation; Steady-state;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1464838

Filename

1464838