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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/11071

Title: New current control based MPPT technique for single stage grid connected PV systems
Authors: JAIN, S
AGARWAL, V
Keywords: power-point-tracking
energy-conversion system
photovoltaic systems
conditioning system
inverter
algorithm
phase
Issue Date: 2007
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: ENERGY CONVERSION AND MANAGEMENT, 48(2), 625-644
Abstract: This paper presents a new maximum power point tracking algorithm based on current control for a single stage grid connected photovoltaic system. The main advantage of this algorithm comes from its ability to predict the approximate amplitude of the reference current waveform or power that can be derived from the PV array with the help of an intermediate variable beta. A variable step size for the change in reference amplitude during initial tracking helps in fast tracking. It is observed that if the reference current amplitude is greater than the array capacity, the system gets unstable (i.e. moves into the positive slope region of the p-v characteristics of the array). The proposed algorithm prevents the PV system from entering the positive slope region of the p-v characteristics. It is also capable of restoring stability if the system goes unstable due to a sudden environmental change. The proposed algorithm has been tested on a new single stage grid connected PV configuration recently developed by the authors to feed sinusoidal current into the grid. The system is operated in a continuous conduction mode to realize advantages such as low device current stress, high efficiency and low EMI. A fast MPPT tracker with single stage inverter topology operating in CCM makes the overall system highly efficient. Specific cases of the system, operating in just discontinuous current mode and discontinuous current mode and their relative merits and demerits are also discussed. (c) 2006
URI: http://dx.doi.org/10.1016/j.enconman.2006.05.018
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11071
http://hdl.handle.net/10054/11071
ISSN: 0196-8904
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