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Maximum power point tracking scheme for PV systems operating under partially shaded conditions

DSpace at IIT Bombay

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Field Value
 
Title Maximum power point tracking scheme for PV systems operating under partially shaded conditions
 
Creator PATEL, H
AGARWAL, V
 
Subject photovoltaic system
converter
module
global peak (gp)
maximum power point tracking (mppt)
partial shading
power-voltage (p-v) characteristics
 
Description Current-voltage and power-voltage characteristics of large photovoltaic (PV) arrays under partially shaded conditions are characterized by multiple steps and peaks. This makes the tracking of the actual maximum power point (NIPP) [global peak (GP)] a difficult task. In addition, most of the existing schemes are unable to extract maximum power from the PV array under these conditions. This paper proposes a novel algorithm to track the global power peak under partially shaded conditions. The formulation of the algorithm is based on several critical observations made out of an extensive study of the PV characteristics and the behavior of the global and local peaks under partially shaded conditions. The proposed algorithm works in conjunction with a dc-dc converter to track the GP. In order to accelerate the tracking speed, a feedforward control scheme for operating the dc-dc converter is also proposed, which uses the reference voltage information from the tracking algorithm to shift the operation toward the MPP. The tracking time with this controller is about one-tenth as compared to a conventional controller. All the observations and conclusions, including simulation and experimental results, are presented.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2011-08-01T07:04:22Z
2011-12-26T12:53:18Z
2011-12-27T05:40:35Z
2011-08-01T07:04:22Z
2011-12-26T12:53:18Z
2011-12-27T05:40:35Z
2008
 
Type Article
 
Identifier IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 55(4), 1689-1698
0278-0046
http://dx.doi.org/10.1109/TIE.2008.917118
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8375
http://hdl.handle.net/10054/8375
 
Language en