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International Journal of Innovation and Scientific Research
ISSN: 2351-8014
 
 
Friday 24 November 2017

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Modeling And Analysis Of Series-Switch Five-Level Dual-Buck Full-Bridge Inverters For Grid-Tied Applications


Volume 30, Issue 3, May 2017, Pages 453–461

 Modeling And Analysis Of Series-Switch Five-Level Dual-Buck Full-Bridge Inverters For Grid-Tied Applications

P. SELVAKUMAR and R. GANDHI

Original language: English

Received 1 January 2017

Copyright © 2017 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract


Dual-buck inverters feature some attractive merits, such as no reverse recovery issues of the body diodes and free of shoot-through. However, since the filter inductors of dual-buck inverters operate at each half cycle of the utility grid alternately, the inductor capacity of dual-buck inverters is twice as much as H-bridge inverters. Thus, the power density of dual-buck converters needs to be improved, as well as the conversion efficiency. The detailed derivation process of two five-level full-bridge topology modeling is presented. The operation modes, modulation methods and control strategies of the series-switch five-level DBFBI topology are analyzed in detail. The THIPWM technique operates by adding a third harmonic component to the sinusoidal modulating wave. It is possible to increase the fundamental by about 15.5% and hence, allow a better utilization of the DC power supply. The power device losses of the three-level DBFBI topology and five-level DBFBI topologies, with different switching frequencies are calculated and compared. Both the relationship between the neutral point potential self-balancing and the modulation index of inverters are revealed. Simulation results have shown that the five-level series DBFBI topology exhibit higher efficiency than the five-level H-bridge inverter topology and the three-level DBFBI topology.

Author Keywords: Series-switch five-level DBFBI topology modeling, Switching State Analysis, Power losses and efficiency, THIsine PWM and THI reduction.


How to Cite this Article


P. SELVAKUMAR and R. GANDHI, “Modeling And Analysis Of Series-Switch Five-Level Dual-Buck Full-Bridge Inverters For Grid-Tied Applications,” International Journal of Innovation and Scientific Research, vol. 30, no. 3, pp. 453–461, May 2017.