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MPPT Scheme for a PV-Fed Single-Phase Single-Stage Grid-Connected Inverter Operating in CCM With Only One Current Sensor

DSpace at IIT Bombay

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Title MPPT Scheme for a PV-Fed Single-Phase Single-Stage Grid-Connected Inverter Operating in CCM With Only One Current Sensor
 
Creator PATEL, H
AGARWAL, V
 
Subject power-point tracking
system
converter
modules
continuous conduction mode (ccm)
current sensor
grid-connected
inverter
maximum power point tracking (mppt)
photovoltaic (pv)
single-stage
 
Description The cost and efficiency of a photovoltaic (PV)-based grid-connected system depends upon the number of components and stages involved in the power conversion. This has led to the development of several single-stage configurations that can perform voltage transformation, maximum power point tracking (MPPT), inversion, and current shaping-all in one stage. Such configurations would usually require at least a couple of current and voltage sensors and a relatively complex control strategy. With a view to minimize the overall cost and control complexity, this paper presents a novel MPPT scheme with reduced number of sensors. The proposed scheme is applicable to any single-stage, single-phase grid-connected inverter operating in continuous conduction mode (CCM). The operation in CCM is desirable as it drastically reduces the stress on the components. Unlike other MPPT methods, which sense both PV array's output current and voltage, only PV array's output voltage is required to be sensed to implement MPPT. Only one current sensor is used for shaping the buck-boost inductor current as well as for MPPT. The information about power output of the array is obtained indirectly from array's voltage and the inductor current amplitude. Detailed analysis and the flowchart of the algorithm for the proposed scheme are included. Simulation and experimental results are also presented to highlight the usefulness of the scheme.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2011-08-01T09:10:43Z
2011-12-26T12:53:19Z
2011-12-27T05:40:36Z
2011-08-01T09:10:43Z
2011-12-26T12:53:19Z
2011-12-27T05:40:36Z
2009
 
Type Article
 
Identifier IEEE TRANSACTIONS ON ENERGY CONVERSION, 24(1), 256-263
0885-8969
http://dx.doi.org/10.1109/TEC.2008.2005282
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8387
http://hdl.handle.net/10054/8387
 
Language en