A new application of Duty Cycle Sweep based on microcontroller to obtain the I-V characteristic curve of photovoltaic modules

Author

Durán, E. ; Galán, J. ; Sidrach-de-Cardona, M. ; Ferrera, M.B. ; Andújar, J.M.

Author_Institution

Dipt. de Ing. Electron. de Sist. Infor. y Aut., Univ. of Huelva, Huelva

fYear

2008

fDate

21-24 April 2008

Firstpage

1

Lastpage

6

Abstract

This paper gives a general approach to the development of duty cycle sweep (DCS) in fixed switching frequency pulse width modulated (PWM) strategies based on microcontroller. The flexibility of the PWM signal generated is characterized by: 1) Fixed duty cycle or variable between 0% and 100%. 2) Duty cycle sweep in both directions: increase from 0% to 100% and decrease from 100% to 0%.3) duty cycle sweep between intervals (30% to 50%, etc) with a precision of until 0.5%. Experimental results show that these properties are adequate to control a DC-DC converter and reproduce the I-V curve of photovoltaic (PV) modules.

Keywords

DC-DC power convertors; PWM power convertors; microcontrollers; solar cells; switching convertors; DC-DC converter control; I-V characteristic curve; PWM signal generation; duty cycle sweep; fixed switching frequency pulse width modulation; microcontroller; photovoltaic modules; solar cell; Character generation; Distributed control; Frequency modulation; Microcontrollers; Photovoltaic systems; Pulse width modulation; Signal generators; Solar power generation; Space vector pulse width modulation; Switching frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 2008. ICIT 2008. IEEE International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-1705-6

Electronic_ISBN

978-1-4244-1706-3

Type

conf

DOI

10.1109/ICIT.2008.4608693

Filename

4608693