New Active Stacked NPC Multilevel Converter: Operation and Features

Floricau, D.; Gateau, Guillaume; Leredde, A.

doi:10.1109/tie.2009.2033484

Cited by 54 publications

(14 citation statements)

References 29 publications

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“…Figure 4 shows the derivation process of 3L active stacked NPC converter. The 3L stacked NPC converter is derived by adding two clamped diodes into a 3L stacked converter, and then 3L active stacked NPC is obtained by replacing the clamped diodes with active switches as shown in Figure 4b,c [28][29][30]. .…”

Section: Hybrid Clamped Multilevel Convertersmentioning

confidence: 99%

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Hybrid Multilevel Converters: Topologies, Evolutions and Verifications

Zhang

Din

et al. 2019

Energies

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Multilevel converters have good potential in high power and high voltage applications due to their advantages of reduced voltage or current stress on power devices. In recent years, hybrid multilevel converter (HMC) have attracted increasing attention since less equipment is required. In this paper, the topologies and evolutions of HMCs are presented, where five topology derivation ways are given by using basic cells in series-parallel/parallel-series. Some general topologies or structures that are used to generate higher levels are also deducted. Then many existing HMCs can be derived, and new topologies of the HMC might be inspired. The capabilities of neutral point and FC voltage balancing control are investigated. The performance of the selected FC-based HMCs is analyzed. Finally, the verifications of operation principle and control strategies for the derived HMCs are carried out.

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Section: Hybrid Clamped Multilevel Convertersmentioning

confidence: 99%

“…Derivation process of 3L active stacked NPC converters. (a) 3L stacked converter [28], (b) 3L stacked NPC converter [29], (c) 3L active stacked NPC converter [30]. .…”

Section: Hybrid Clamped Multilevel Convertersmentioning

confidence: 99%

Hybrid Multilevel Converters: Topologies, Evolutions and Verifications

Zhang

Din

et al. 2019

Energies

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“…Furthermore, as a dead time is inserted in the commutation signals, there is a short interval in which the current is flowing through the MOSFET antiparallel diode, causing additional losses. Considering a dead time t dt of 250 ns the additional losses for a half period of the grid voltage are expressed in (14). behavior with respect to traditional Si devices; therefore the total switching losses are expected to be very low.…”

Section: Power Losses With the Proposed Modulationmentioning

confidence: 99%

“…2(a)). The concept was enhanced in [14], enabling a better loss distribution by substituting diodes with power switches (active SNPC, ASNPC) ( Fig. 2(b)).…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Three-Level ANPC Photovoltaic Grid-Connected Inverter With 650-V SiC Devices and Optimized PWM

Barater

Concari

Buticchi

et al. 2016

IEEE Trans. on Ind. Applicat.

128

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(2016) Performance evaluation of a 3-level ANPC photovoltaic grid-connected inverter with 650V SiC devices and optimized PWM. IEEE Transactions on Industry Applications, 52 (2). pp. 2475 -2485 . ISSN 1939 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/33387/1/Performance%20Evaluation%20of%20a%203-Level %20ANPC%20Photovoltaic%20Grid-Connected%20Inverter%20with%20650V%20SiC %20Devices%20and%20Optimized%20PWM.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Abstract-Photovoltaic (PV) energy conversion has been on the spotlight of scientific research on renewable energy for several years. In recent years the bulk of the research on PV has focused on transformerless grid-connected inverters, more efficient than traditional line transformer-based ones, but more critical from a power quality point of view, especially in terms of ground leakage current. Neutral point clamped (NPC) inverters have recently gained interest due to their intrinsically low ground leakage current and high efficiency, especially for MOSFET-based topologies. This paper presents an active NPC (ANPC) topology equipped with 650 V SiC MOSFETs, with a new modulation strategy that allows to reap the benefits of the wide-bandgap devices. An efficiency improvement is obtained due to the parallel operation of two devices during the freewheeling intervals. Simulations and experimental results confirm the effectiveness of the proposed converter.

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“…Therefore new topologies are being proposed and reported to reduce the overall count of active and passive devices for multilevel power conversion. The innovations in topological structures are being integrated with suitably selected modulation schemes and control strategies to minimize the requirement of solid state devices, energy storage components and DC sources [11][12][13][14][15][16][17][18][19][20][21]. At the same time, these literatures [11][12][13][14][15][16][17][18][19][20][21] present opportunity for further improvisations to increase number of levels in the output and increased redundant states to attain more flexibility in control.…”

Section: Introductionmentioning

confidence: 99%