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A Current-Forced Line-Commutated Inverter for Single-Phase Grid-Connected Photovoltaic Generation SystemsUNLU, M. , CAMUR, S. , BESER, E. , ARIFOGLU, B.
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inverter, photovoltaic systems, thyristor circuits, total harmonic distortion
power(18), grid(13), connected(12), systems(10), line(6), inverter(6), commutated(6), single(5), photovoltaic(5), phase(5)
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About this article
Date of Publication: 2015-05-31
Volume 15, Issue 2, Year 2015, On page(s): 85 - 92
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2015.02011
Web of Science Accession Number: 000356808900011
SCOPUS ID: 84979846322
A simple power electronic interface based on the line-commutated inverter (LCI) has been developed in order to inject sinusoidal current to the grid for single-phase grid-connected photovoltaic (PV) energy generation systems. The proposed inverter facilitates controlling the injecting/grid current with a controllable power factor in contrast to the conventional LCI system. It is achieved that the total harmonic distortion (THD) of the injecting currents for the different firing angles/power factors and reference currents is about 5% or less than 5%. Thus, the grid-connected standards for injecting current are satisfied without filter equipment unlike the conventional LCI system. The proposed system has been built in MATLAB/Simulink and examined experimentally on PV array of 160 W. The simulation and experimental results are better performance than the conventional line-commutated inverter methods reported in the literature. The proposed LCI has a simple and robust structure, and it can be easily synchronized with grid thanks to self-latching property of SCRs. Therefore, it is a good alternative for the power transferring from PV panels to the utility grid in grid-connected PV systems.
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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