Load-Current-Corrected Capacitor Voltage Control in Eight-Level DC-AC Converter Using Extended Commutation Cells

The extended commutation cell is a four-port four-switch cell that allows for bidirectional energy transport in two orthogonal directions throughout the cell. By cascading multiple cells, a multilevel converter can be constructed with a high number of levels. The voltage across each cell capacitor c...

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Veröffentlicht in:	IEEE transactions on power electronics 2016-10, Vol.31 (10), p.7286-7296
Hauptverfasser:	Lemmen, Erik, van Duivenbode, Jeroen, Duarte, Jorge L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Buck-boost Capacitors Commutation Converters current control DC-AC power converters Design engineering ECC Electric potential Flexibility Inductors Integrated circuits multicell Multilevel Ripples Surge protectors switched capacitor Switches Switching Topology Voltage Voltage control
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creator	Lemmen, Erik van Duivenbode, Jeroen Duarte, Jorge L.
description	The extended commutation cell is a four-port four-switch cell that allows for bidirectional energy transport in two orthogonal directions throughout the cell. By cascading multiple cells, a multilevel converter can be constructed with a high number of levels. The voltage across each cell capacitor can be adjusted independently of the load, resulting in high flexibility in output levels. This paper presents an improved method for capacitor voltage control, based on a system model and the measured output current. The proposed method is analyzed and verified on a 4.4\text{-}\mathrm{k}\mathrm{W} eight-level dc-ac converter. The obtained reduction in capacitor voltage ripple is more than 75\%.
doi_str_mv	10.1109/TPEL.2015.2507261
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subjects	Buck-boost Capacitors Commutation Converters current control DC-AC power converters Design engineering ECC Electric potential Flexibility Inductors Integrated circuits multicell Multilevel Ripples Surge protectors switched capacitor Switches Switching Topology Voltage Voltage control
title	Load-Current-Corrected Capacitor Voltage Control in Eight-Level DC-AC Converter Using Extended Commutation Cells
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