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A new algorithm for rapid tracking of approximate maximum power point in photovoltaic systems

DSpace at IIT Bombay

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Title A new algorithm for rapid tracking of approximate maximum power point in photovoltaic systems
 
Creator AGARWAL, VIVEK
JAIN, SACHIN
 
Subject mathematical models
numerical analysis
current voltage
approximation theory
 
Description This paper presents a new algorithm for tracking maximum power point in photovoltaic systems. This is a fast tracking algorithm, where an initial approximation of maximum power point is (MPP) quickly achieved using a variable step-size. Subsequently, the exact maximum power point can be targeted using any conventional method like the hill-climbing or incremental conductance method. Thus, the drawback of a fixed small step-size over the entire tracking range is removed, resulting in reduced number of iterations and much faster tracking compared to conventional methods. The strength of the algorithm comes from the fact that instead of tracking power, which does not have a one-to-one relationship with duty cycle, it tracks an intermediate variable β, which has a monotonically increasing, one-to-one relationship. The algorithm has been verified on a photovoltaic system modeled in Matlab-Simulink software. The algorithm significantly improves the efficiency during the tracking phase as compared to a conventional algorithm. It is especially suitable for fast changing environmental conditions. The proposed algorithm can be implemented on any fast controller such as the digital signal processor. All the details of this study are presented.
 
Publisher IEEE
 
Date 2008-11-27T04:09:47Z
2011-11-25T12:28:45Z
2011-12-26T13:04:40Z
2011-12-27T05:50:40Z
2008-11-27T04:09:47Z
2011-11-25T12:28:45Z
2011-12-26T13:04:40Z
2011-12-27T05:50:40Z
2004
 
Type Article
 
Identifier IEEE Power Electronics Letters 2(1), 16-19
1540-7985
http://dx.doi.org/10.1109/LPEL.2004.828444
http://hdl.handle.net/10054/191
http://dspace.library.iitb.ac.in/xmlui/handle/10054/191
 
Language en_US