Grid-connected PV System Using a Quasi-Z-source Inverter

Author

Park, Jong-Hyoung ; Kim, Heung-Geun ; Nho, Eui-Cheol ; Chun, Tae-Won ; Choi, Jaeho

Author_Institution

Kyungpook Nat. Univ., Daegu

fYear

2009

fDate

15-19 Feb. 2009

Firstpage

925

Lastpage

929

Abstract

This paper presents the MPPT (maximum power point tracking) and PCC (point of common coupling) current control strategy for photovoltaic (PV) grid-connected generating system using the quasi-Z-source inverter (QZSI). At first, in order to explain the above controllers, the characteristic of QZSI is analyzed. And then, the MPPT control technique with a modified P&O method, the PCC current control one for the regulation of DC-link capacitor voltage, and the PWM methods for the proposed system are explained. The feasibility of the propose algorithm is verified through the simulation and experiment with 3 kW system.

Keywords

PWM invertors; electric current control; photovoltaic power systems; power control; power generation control; power grids; DC-link capacitor voltage; MPPT current control strategy; PCC current control strategy; PWM methods; grid-connected PV generating system; maximum power point tracking; point of common coupling; power 3 kW; quasi-Z-source inverter; Capacitors; Control systems; Current control; Mesh generation; Photovoltaic systems; Power generation; Pulse width modulation; Pulse width modulation inverters; Solar power generation; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE

Conference_Location

Washington, DC

ISSN

1048-2334

Print_ISBN

978-1-4244-2811-3

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2009.4802773

Filename

4802773