Title :
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
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;
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
DOI :
10.1109/ICIT.2008.4608693
