Synthesis of Multilevel Converters Based on Single-and/or Three-phase Converter Building Blocks

Wen, Jianxiang; Smedley, K.M.

doi:10.1109/iecon.2007.4459918

Cited by 21 publications

(23 citation statements)

References 22 publications

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“…This structure is capable of reaching medium output voltage levels using only standard low voltage mature technology components, as well as minimizing total harmonic distortion THD, which can provide significant reduction of output passive filters. This kind of converters also features a high modularity degree because each converter can be seen as a module with similar circuit topology, control structure and modulation [16,34,44]. Thus, in case of a fault in one of these modules, it is possible to replace it quickly and easily.…”

Section: Cmc In Recent Research and Applicationsmentioning

confidence: 99%

Cascaded multilevel converters in recent research and applications

Malinowski

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Multilevel converters have been intensively investigated and developed since 1960s and have found successful industrial applications. The aim of this paper is to present state of the art as well as recent research and applications of cascaded multilevel converters, which are a very interesting solution for power distribution systems and renewable energy sources. Cascaded multilevel converters can easily operate at medium and high voltage based on the series connection of power modules (cells), which use standard low-voltage component configurations. Series connections of modules (cells) allow for high quality output voltages and input currents, reduction of passive components and availability of component redundancy. Due to these features the cascaded multilevel converters have been recognized as attractive solutions for high-voltage direct-current (HVDC) transmission, solid state transformers (SST) and photovoltaic (PV) systems.Key words: multilevel converters, cascaded converters, modular multilevel converters, modulation, solid state transformer, photovoltaic systems. Cascaded multilevel converters in recent research and applications M. MALINOWSKIInstitute of Control and Industrial Electronics, Warsaw University of Technology, 75 Koszykowa St., 00-662 Warsaw, Poland for multilevel structures. Among the main benefits one may count a superior harmonic spectrum for a given switching frequency, a lower dv/dt stress at the converter terminals, cables and end windings of transformers/generators, a lower common mode voltage, and substantially lower semiconductor switching losses, particularly at medium to higher switching frequencies. A three-level topology is also a highly competitive alternative to the two-level structure in terms of cost, efficiency, and weight/size [2].The final choice of converter topology for RES depends on type of application, expected power, reliability demand and price. Three-phase multilevel converters, e.g. three-level neutral point clamped (3L-NPC) [3][4][5][6], three-level transistor clamped (3L-TCC) [4] or five-level active neutral point clamped (5L-ANPC) [7][8][9] are most popular in high power applications. However, 3L-NPC converters may be considered even in power range of few hundreds kVA, which was discussed in [2].

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Section: Cmc In Recent Research and Applicationsmentioning

confidence: 99%

Cascaded multilevel converters in recent research and applications

Malinowski

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The other advantage for the cascaded multilevel inverter is its modular structure. This topology is constructed from smaller units with the same structure and control circuit [10]. When an error occurs in one of the units, this feature makes it possible for the defective unit to be easily and quickly replaced with a fault-free unit.…”

Section: Introductionmentioning

confidence: 99%

A new cascaded multilevel inverter with series and parallel connection ability of DC voltage sources

Babaei¹,

Gowgani²,

Sabahi³

2015

Turk J Elec Eng & Comp Sci

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“…Generally, a single-phase inverter requires an extra full-bridge circuit known as a folded cascaded or polarity generation circuit [15], [16]. The final output voltage is synthesized by the combination of the input DC voltages of all series-connected units [11], [17]. This topology exhibits modular characteristics because all its units are similar and share the same control strategy.…”

Section: Introductionmentioning

confidence: 99%

A New Single-Phase Asymmetrical Cascaded Multilevel DC-Link Inverter

Ahmed¹,

Hendawi²

2016

Journal of Power Electronics

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This paper presents a new single-phase asymmetrical cascaded multilevel DC-link inverter. The proposed inverter comprises two stages. The main stage of the inverter consists of multiple similar cells, each of which is a half-bridge inverter consisting of two switches and a single DC source. All cells are connected in a cascaded manner with a fixed neutral point. The DC source values are not made equal to increase the performance of the inverter. The second circuit is a folded cascaded H-bridge circuit operating at a line frequency. One of the main advantages of this proposed topology is that it is a modular type and can thus be extended to high stages without changing the configuration of the main stage circuit. Two control schemes, namely, low switching with selective harmonic elimination and sinusoidal pulse width modulation, are employed to validate the proposed topology. The detailed approach of each control scheme and switching pulses are discussed in detail. A 150W prototype of the proposed system is implemented in the laboratory to verify the validity of the proposed topology.

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Synthesis of Multilevel Converters Based on Single-and/or Three-phase Converter Building Blocks

Cited by 21 publications

References 22 publications

Cascaded multilevel converters in recent research and applications

Cascaded multilevel converters in recent research and applications

A new cascaded multilevel inverter with series and parallel connection ability of DC voltage sources

A New Single-Phase Asymmetrical Cascaded Multilevel DC-Link Inverter

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