Control of single-stage single-phase PV inverter

Author

Ciobotaru, Mihai ; Teodorescu, Remus ; Blaabjerg, Frede

Author_Institution

Inst. of Energy Technol., Aalborg Univ.

fYear

2005

fDate

11-14 Sept. 2005

Abstract

In this paper the issue of control strategies for single-stage photovoltaic (PV) inverter is addressed. Two different current controllers have been implemented and an experimental comparison between them has been made. A complete control structure for the single-phase PV system is also presented. The main elements of the PV control structure are: - a maximum power point tracker (MPPT) algorithm using the incremental conductance method; - a synchronization method using the phase-locked-loop (PLL), based on delay; the input power control using the dc voltage controller and power feed-forward; - and the grid current controller implemented in two different ways, using the classical proportional integral (PI) and the novel proportional resonant (PR) controllers. The control strategy was tested experimentally on 1.5 kW PV inverter

Keywords

PI control; delays; electric current control; feedforward; invertors; phase locked loops; photovoltaic power systems; power control; power generation control; synchronisation; voltage control; 1.5 kW; PI controllers; PLL; algorithm; classical proportional integral controllers; current controllers; dc voltage controller; delay; incremental conductance method; input power control; maximum power point tracker; phase-locked-loop; power feedforward; proportional resonant controllers; single-stage single-phase PV inverter; synchronization method; Control systems; Delay; Inverters; Phase locked loops; Photovoltaic systems; Pi control; Power control; Proportional control; Solar power generation; Voltage control; Distributed power; Harmonics; Photovoltaic; Single phase system; Solar Cell System;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2005 European Conference on

Conference_Location

Dresden

Print_ISBN

90-75815-09-3

Type

conf

DOI

10.1109/EPE.2005.219501

Filename

1665691