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Open AccessArticle

A Novel Computational Approach for Harmonic Mitigation in PV Systems with Single-Phase Five-Level CHBMI

Dipartimento Energia, Ingegneria dell’Informazione e Modelli Matematici (DEIM), University of Palermo, Palermo 90133, Italy
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Energies 2018, 11(8), 2100; https://doi.org/10.3390/en11082100
Received: 30 July 2018 / Revised: 7 August 2018 / Accepted: 9 August 2018 / Published: 13 August 2018
(This article belongs to the Special Issue Power Electronics in Renewable Energy Systems)
In this paper, a novel approach to low order harmonic mitigation in fundamental switching frequency modulation is proposed for high power photovoltaic (PV) applications, without trying to solve the cumbersome non-linear transcendental equations. The proposed method allows for mitigation of the first-five harmonics (third, fifth, seventh, ninth, and eleventh harmonics), to reduce the complexity of the required procedure and to allocate few computational resource in the Field Programmable Gate Array (FPGA) based control board. Therefore, the voltage waveform taken into account is different respect traditional voltage waveform. The same concept, known as “voltage cancelation”, used for single-phase cascaded H-bridge inverters, has been applied at a single-phase five-level cascaded H-bridge multilevel inverter (CHBMI). Through a very basic methodology, the polynomial equations that drive the control angles were detected for a single-phase five-level CHBMI. The acquired polynomial equations were implemented in a digital system to real-time operation. The paper presents the preliminary analysis in simulation environment and its experimental validation. View Full-Text
Keywords: photovoltaic systems; multilevel power converter; soft switching; selective harmonic mitigation; phase shifted; voltage cancellation photovoltaic systems; multilevel power converter; soft switching; selective harmonic mitigation; phase shifted; voltage cancellation
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Miceli, R.; Schettino, G.; Viola, F. A Novel Computational Approach for Harmonic Mitigation in PV Systems with Single-Phase Five-Level CHBMI. Energies 2018, 11, 2100.

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