Energy-Balance Modeling and Discrete Control for Single-Phase Grid-Connected PV Central Inverters

Author

Meza, Carlos ; Negroni, Juan J. ; Biel, Domingo ; Guinjoan, Francisco

Author_Institution

Inst. of Ind. & Control Eng., Univ. Politec. de Catalunya, Barcelona

Volume

55

Issue

7

fYear

2008

fDate

7/1/2008 12:00:00 AM

Firstpage

2734

Lastpage

2743

Abstract

This paper presents a two-control loop design considering the nonlinear time-varying characteristics of a single-phase grid-connected photovoltaic (PV) full-bridge central inverter. The control scheme design is based on the energy-balance modeling of the PV system and enables the design of a voltage loop linear discrete controller ensuring the stability of the system for the whole range of PV array operating conditions. A set of experimental results carried out on a laboratory prototype is provided to validate the proposed approach.

Keywords

control system synthesis; invertors; nonlinear control systems; photovoltaic power systems; power grids; time-varying systems; voltage control; control scheme design; discrete control; energy-balance modeling; nonlinear time-varying characteristics; photovoltaic system; single-phase grid-connected PV central inverters; voltage loop linear discrete controller; Centralized control; Mesh generation; Phased arrays; Photovoltaic systems; Power system stability; Proportional control; Pulse width modulation; Pulse width modulation inverters; Solar power generation; Voltage control; Photovoltaic power systems; power control; power electronics;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2008.922595

Filename

4550673