A simple perturb and observe MPPT scheme for Cascaded H-Bridge based photovoltaic system

Author

Farivar, Ghias ; Agelidis, Vassilios Georgios ; Hredzak, Branislav

Author_Institution

Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales (UNSW), Sydney, NSW, Australia

fYear

2013

fDate

Sept. 29 2013-Oct. 3 2013

Firstpage

1

Lastpage

5

Abstract

In this paper a simple Maximum Power Point Tracking (MPPT) scheme for Cascaded H-Bridge (CHB) converter based Photovoltaic (PV) system is proposed. The scheme uses the modularity of the CHB converter to enhance the tracking performance compared to conventional perturb and observe scheme. Along with superior performance, the hardware structure and the required computations of the proposed scheme are simpler than the conventional scheme. A 3.3 kW peak solar PV system with a single-phase 7-level CHB converter is modeled in MATLAB/Simulink environment as a case study. The effectiveness of the proposed scheme is demonstrated by simulation results in two different scenarios. At first, the startup and speed of convergence is studied and then, operation under dynamic environmental conditions is considered.

Keywords

bridge circuits; electric current control; maximum power point trackers; observers; perturbation techniques; photovoltaic power systems; power convertors; voltage control; MPPT; cascaded H-bridge converter; maximum power point tracking; observer technique; perturbation technique; photovoltaic system; power 3.3 kW; Computational modeling; Frequency modulation; MATLAB; Mathematical model; Switches; Transient analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference (AUPEC), 2013 Australasian Universities

Conference_Location

Hobart, TAS

Type

conf

DOI

10.1109/AUPEC.2013.6725466

Filename

6725466