DocumentCode :
1328184
Title :
Single-sensor multi-channel maximum power point tracking controller for photovoltaic solar systems
Author :
Jiang, Yizhang ; Abu Qahouq, Jaber A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alabama, Tuscaloosa, AL, USA
Volume :
5
Issue :
8
fYear :
2012
fDate :
9/1/2012 12:00:00 AM
Firstpage :
1581
Lastpage :
1592
Abstract :
This study presents a maximum power point tracking (MPPT) method and controller for a multi-channel (N-channel) photovoltaic solar system. The N-channel single-sensor MPPT (SS-MPPT) controller is able to track the maximum power point (MPP) of each solar panel using only one output current sensor in the N-channels. Compared with a conventional N-channel MPPT system which requires N voltage sensors, N current sensors, 2N analogue-to-digital converters (ADCs) (or an ADC with 2N channels) and N-MPPT controllers along with the associated conditioning circuitries, the proposed method only requires one sensor, one ADC and one MPPT controller. In the proposed N-channel SS-MPPT controller, the MPPT for each channel is achieved by tracking the maxima of the output (load) current (resulting in the maxima of the system output power) using the Perturb and Observe algorithm and the maxima of each channel power via channel output current difference optimisation. Two algorithms which can be used to realise the SS-MPPT controller are discussed and compared. The concept and operation of the SS-MPPT controller is presented, analysed and verified by results obtained from a proof-of-concept experimental prototype.
Keywords :
analogue-digital conversion; maximum power point trackers; optimisation; perturbation techniques; photovoltaic power systems; sensors; ADC; SS-MPPT controller; analogue-to-digital converter; current sensor; maximum power point tracking; multichannel photovoltaic solar system; optimisation; perturb and observe algorithm; solar panel; voltage sensor;
fLanguage :
English
Journal_Title :
Power Electronics, IET
Publisher :
iet
ISSN :
1755-4535
Type :
jour
DOI :
10.1049/iet-pel.2012.0157
Filename :
6340695
Link To Document :
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