DocumentCode :
46244
Title :
An Hybrid Digital-Analog Sliding Mode Controller for Photovoltaic Applications
Author :
Mamarelis, Emilio ; Petrone, Giovanni ; Spagnuolo, Giovanni
Author_Institution :
Dept. of Electron. & Comput. Eng., Univ. di Salerno, Salerno, Italy
Volume :
9
Issue :
2
fYear :
2013
fDate :
May-13
Firstpage :
1094
Lastpage :
1103
Abstract :
Sliding mode is a control technique that is widely employed in switching converter applications. Such a nonlinear control technique, which is commonly implemented by means of analog circuitry only, forces the switches commutations by comparing a reference signal with a combination of signals acquired on the converter itself. In this way, the control action and the switching modulation are integrated in a single functional block. In this paper the implementation of the sliding mode controller in a low cost digital device is discussed. The proposed approach profits from features offered by some digital devices, e.g., the dsPic33FJ16GS502 family from Microchip Technology Inc., in order to make the implementation simple. In the paper, the aspects related to the accuracy of the comparison between the signals required by the sliding mode controller are discussed. Moreover, the elaboration time needed to calculate the signals that drive the converter´s switching devices is the subject of an in-depth analysis. The techniques proposed in the paper have been validated by means of simulations and through experimental results performed on a switching dc/dc converter for photovoltaic applications.
Keywords :
DC-DC power convertors; digital control; photovoltaic power systems; power generation control; switching convertors; variable structure systems; Microchip Technology Inc; analog circuitry; control action; dsPic33FJ16GS502; hybrid digital-analog sliding mode controller; in-depth analysis; low cost digital device; nonlinear control technique; photovoltaic applications; reference signal; single functional block; switching dc-dc converter; switching modulation; Equations; Mathematical model; Modulation; Photovoltaic systems; Switched-mode power supply; Switches; , Digital control; microcontrollers programming; photovoltaic; sliding mode;
fLanguage :
English
Journal_Title :
Industrial Informatics, IEEE Transactions on
Publisher :
ieee
ISSN :
1551-3203
Type :
jour
DOI :
10.1109/TII.2012.2220372
Filename :
6310051
Link To Document :
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