Relevant bibliographies by topics / Neutral-Point-Clamped (NPC)

Academic literature on the topic 'Neutral-Point-Clamped (NPC)'

Author: Grafiati
Published: 8 June 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Neutral-Point-Clamped (NPC).'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Journal articles on the topic "Neutral-Point-Clamped (NPC)":

1

Pakdel, M., and S. Jalilzadeh. "A Novel Neutral Point Clamped Full-Bridge Topology for Transformerless Photovoltaic Grid-Connected Inverters." Engineering, Technology & Applied Science Research 7, no. 2 (April 24, 2017): 1460–63. http://dx.doi.org/10.48084/etasr.1010.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This paper presents a novel neutral point clamped full-bridge topology for transformerless photovoltaic grid-tied inverters. Transformerless grid-connected inverters have been used widely in recent years since they offer higher efficiency and lower costs. Ground leakage current suppression is the main issue which should be considered carefully in transformerless photovoltaic grid-connected inverters. Among different methods used to decline ground leakage current, neutral point clamped (NPC) topologies are considered more useful and effective. In NPC topologies, the short-circuited output voltage at the freewheeling period is clamped to the middle of the DC bus voltage. Therefore, the common-mode voltage (CM) will be constant at the whole switching period. Various NPC topologies such as H6 [1], HB-ZVR [2], oH5 [3], and PN-NPC [4] have been proposed. In this paper, a novel NPC topology is proposed which has lower power losses and higher efficiency over previous topologies. Furthermore, the proposed NPC topology exhibits a similar ground leakage current with the PN-NPC topology. The proposed NPC topology is analyzed theoretically using simulation studies and an experimental prototype is provided to verify theoretical analysis and simulation studies.
2

Shen, Yanxia, Beibei Miao, Dinghui Wu, and Kader Ali Ibrahim. "Fault-Tolerant Control Strategy for Neutral-Point-Clamped Three-Level Inverter." Journal of Control Science and Engineering 2018 (February 1, 2018): 1–9. http://dx.doi.org/10.1155/2018/5126404.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
A fault-tolerant control technique is discussed for the Neutral-Point-Clamped (NPC) three-level inverter, which ensures that the NPC inverter operates normally even under device failures. A two-level leg is added to the NPC inverter; when the device open circuit fault occurs, the load of this faulty phase is connected to the neutral point of this two-level leg through the bidirectional thyristors. An improved Space Vector Pulse Width Modulation (SVPWM) strategy called “addition and subtraction substitution SVPWM” is proposed to effectively suppress fluctuation in capacitor neutral-point voltages by readjusting the sequence and action time of voltage vectors. The fault-tolerant topology in this paper has the advantages of fewer switching devices and lower circuit costs. Experimental results show that the proposed fault-tolerant system can operate in balance of capacitor neutral-point voltages at full output power and the reliability of the inverter is greatly enhanced.
3

Guo, Yujing, and Junhuai Zhang. "Modulation Technique Design of An Improved Zero Common Mode Voltage (CMV)." Journal of Physics: Conference Series 2563, no. 1 (August 1, 2023): 012020. http://dx.doi.org/10.1088/1742-6596/2563/1/012020.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Abstract Voltage imbalance of neutral-point and CMV are hot issues in the research of three-level inverters. This paper first introduces the three-level topology of the neutral-point clamped (NPC) inverter. Aiming to eliminate CMV of three-level NPC and balance the voltage of the neutral point simultaneously, a virtual space vector pulse modulation (VSVPWM) strategy is proposed. Virtual voltage vectors of this strategy are composed of 3 medium vectors. The voltage of the neutral point is balanced since the average current of the neutral point is 0. Therefore, the balance index is introduced to redefine virtual voltage vectors, so the voltage of the neutral point can recover quickly when the capacitors’ voltage of the dc-link is imbalanced.
4

Guo, Xiaoqiang, Xuehui Wang, Ran He, and Mehdi Narimani. "Modeling and Modulation of NNPC Four-Level Inverter for Solar Photovoltaic Power Plant." International Journal of Photoenergy 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/2383872.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Photovoltaic (PV) power plant is an attractive way of utilizing the solar energy. For high-power PV power plant, the multilevel inverter is of potential interest. In contrast to the neutral-point clamped (NPC) or flying capacitor (FC) multilevel inverter, the nested neutral point clamped (NNPC) four-level inverter has better features for solar photovoltaic power plant. In practical applications, the common mode voltage reduction of the NNPC four-level is one of the important issues. In order to solve the problem, a new modulation strategy is proposed to minimize the common mode voltage. Compared with the conventional solution, our proposal can reduce the common mode voltage to 1/18 of the DC bus voltage. Moreover, it has the capability to balance the capacitor voltages. Finally, we carried out time-domain simulations to test the performance of the NNPC four-level inverter.
5

Xiaoming Yuan and I. Barbi. "Zero-voltage switching for the neutral-point-clamped (NPC) inverter." IEEE Transactions on Industrial Electronics 49, no. 4 (August 2002): 800–808. http://dx.doi.org/10.1109/tie.2002.801064.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ek-Iam, Kanyarat, and Yuttana Kumsuwan. "Discontinuous Space Vector Modulation Strategy for Three-Level Neutral Point Clamped Inverter." Applied Mechanics and Materials 781 (August 2015): 435–38. http://dx.doi.org/10.4028/www.scientific.net/amm.781.435.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This paper presents a discontinuous space vector modulation (SVM) strategy for a three-level neutral point clamped (3L-NPC) inverter. The proposed scheme, calculation switching time of the 3L-NPC inverter is fully described. A mathematical analysis of the duty cycle is determined by utilizing the calculated switching time method. The main advantages of the proposed method are minimization of the number of commutations of switches and reduction of the switching losses. Simulated and calculation results are presented to verify the validity and effectiveness of the proposed modulation scheme.
7

Gong, Bo, Shanmei Cheng, and Yi Qin. "Simple three-level neutral point voltage balance control strategy based on SVPWM." Archives of Electrical Engineering 62, no. 1 (March 1, 2013): 15–23. http://dx.doi.org/10.2478/aee-2013-0002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Abstract The unbalance of the neutral point voltage is an inherent problem of three-level neutral-point-clamped (NPC) inverter, the effect of neutral point voltage balancing which is caused by voltage vector is analyzed, and the relationship of the voltage offset and neutral point voltage is studied in this paper. This paper proposes a novel neutral point balance strategy for three-level NPC inverter based on space vector pulse width modulation (SVPWM). A voltage offset is added to the modulation wave, and a closed-loop neutral point voltage balance control system is designed. In the control system, the dwelling time of synthesis voltage vectors for SVPWM is varied to solve the problem of the unbalance of the neutral point voltage, the sequence of the voltage vectors maintains unchanging. Simulation and experimental results show the neutral point voltage balancing control strategy based on SVPWM is effective.
8

Reusser, Carlos A., and Hector Young. "Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications." Electronics 10, no. 3 (January 20, 2021): 233. http://dx.doi.org/10.3390/electronics10030233.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this paper, a novel four-level single-phase multilevel converter is introduced, consisting of six active switches arranged in a quasi-nested configuration. The proposed topology synthesizes its output voltage levels with respect to a floating neutral point, using four cascaded capacitors with identical voltage levels. The proposed converter contains a reduced number of components compared to the neutral point clamped (NPC) or active-NPC topologies (ANPC) for the same number of output voltage levels, since it does not require diode or active switch clamping to a neutral point. Moreover, no floating capacitors with asymmetric voltage levels are employed, thereby simplifying the capacitor voltage balancing. The switching operation principles, modulation technique and control scheme for supplying a single-phase resistive-inductive load are addressed in detail. The proposed four-level inverter allows generating an additional output voltage level with the same semiconductor count as conventional three-level inverters such as NPC and ANPC which allows a superior waveform quality, with a THDv reduction of 32.69% in comparison the clamped inverters. Experimental tests carried out in a laboratory-scale setup verify the feasibility of the proposed topology.
9

Puthiyapurayil, Muhammed Ramees Mullali Kunnontakath, Mohamed Nadir Nasirudeen, Yashkumar A. Saywan, Md Waseem Ahmad, and Hasmat Malik. "A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter." Electronics 11, no. 19 (October 2, 2022): 3169. http://dx.doi.org/10.3390/electronics11193169.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Due to numerous advantages, a neutral point clamped (NPC) inverter is a preferred choice for high-power applications and renewable technology. The reliability of the NPC inverter is a major concerning factor during the assessment of system performance as power semiconductor switches are vulnerable to abnormal conditions. Open-circuit (OC) switch faults are not as dangerous as short circuit (SC) faults but eventually have enough potential to cause cascaded failure to other components in the system and thus need to be supervised carefully. The OC faults result in a distortion of voltage and current signals in the NPC converter. Based on these signals, over the past few years, many efforts have been made to identify and localize the OC switch fault to the switch level in the NPC topology. In this paper, a review of different OC switch fault diagnostic methods is provided. Starting from the NPC inverter operation under healthy and faulty conditions, the various possible and unavailable switching states along with the deviation in pole voltage under different switch fault conditions is discussed. Then, based on the approach used for system-based fault detection, the OC fault detection methods are classified. The various OC methods are further discussed on the basis of signal, i.e., current, voltage or a combination of both signals used as a signature for fault detection. Emphasis is given to the principle involved, diagnostic variables utilized, the implementation approach and the diagnostic time required. Finally, the approaches are tabulated so as to provide a quick reference for NPC fault diagnostics.
10

Barros, J. Dionísio, Luis Rocha, and J. Fernando Silva. "Backstepping Predictive Control of Hybrid Microgrids Interconnected by Neutral Point Clamped Converters." Electronics 10, no. 10 (May 19, 2021): 1210. http://dx.doi.org/10.3390/electronics10101210.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this work, DC and AC parts of hybrid microgrids are interconnected by a neutral point clamped—NPC converter controlled using a new backstepping predictive (BP) method. The NPC converter is controlled to operate in the DC microgrid voltage control mode or in the AC microgrid power control mode. The novel backstepping predictive controller is designed using the dq state space dynamic model of the NPC converter connected to the hybrid microgrid. The designed BP controller regulates the DC voltage or AC injected power, balances the capacitor voltages, controls the AC currents, and enforces the near unity power factor. Simulation (MATLAB/Simulink) and experimental (laboratory prototype) results show that the converter can regulate the DC voltage in the DC microgrid interconnection point, by adjusting the AC power conversion to compensate variations on the loads or on the distributed renewable energy sources in the DC microgrid. AC currents are sinusoidal with low harmonic distortion. The obtained BP controller is faster at balancing capacitor voltages than PWM (pulse width modulation) control with carrier offset. The fast AC power response allows the converter to be used as a primary frequency regulator of the AC microgrid. This research is appropriate for power and voltage control in hybrid microgrids with renewable energy.
More sources
You might also be interested in the extended bibliographies on the topic 'Neutral-Point-Clamped (NPC)' for particular source types:
Journal articles Dissertations / Theses

Dissertations / Theses on the topic "Neutral-Point-Clamped (NPC)":

1

Sprenger, Michael. "Untersuchung des Dreipunkt – Neutral Point Clamped – Stromrichters mit Spannungszwischenkreis (3L-NPC-VSC) für Niederspannungswindkraftanwendungen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-172806.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Das Ziel der Arbeit war die Untersuchung eines neuartigen Phasenbausteins mit der Topologie des Dreipunkt – Neutral Point Clamped – Stromrichters mit Spannungszwischenkreis (3L-NPC-VSC) für Windkraftanwendungen. Wichtige Anforderungen an den Phasenbaustein und daraus resultierende Herausforderungen, sowie Lösungen für ausgewählte Teilprobleme werden präsentiert. Um die Vorteile des 3L-NPC-VSC für Hersteller von Windkraftanlagen zugänglich zu machen, ist es sinnvoll, einen neuartigen Phasenbaustein zu entwickeln. Der Phasenbaustein soll einfach in Systeme zu integrieren sein, in denen gegenwärtig Zweipunktstromrichter (2L-VSC) zum Einsatz kommen. Da sich Modulation, Zwischenkreisbalancierung und Kurzschlussschutz vom 2L-VSC unterscheiden, soll der Phasenbaustein diese Herausforderungen eigenständig bewältigen. Die Arbeit beschreibt die Konzeption eines solchen Phasenbausteins und behandelt insbesondere die Modulation, die Zwischenkreisbalancierung und den Kurzschlussschutz des 3L-NPC-VSC. Ein Vergleich verschiedener Modulationsverfahren wurde durchgeführt und die am besten geeigneten Verfahren für die Implementation in den Phasenbaustein ausgewählt. Eine Anforderung war, dass dieser Signale einer übergeordneten Regelung verarbeiten kann, welche für einen 2L-VSC berechnet wurden. Ein Überblick der Zwischenkreisbalancierungsverfahren zeigte, dass nahezu alle den Nachteil einer zusätzlich benötigten Strommessung haben. Die Untersuchung einer neuen an der Professur Leistungselektronik der TU Dresden entwickelten Methode ohne den Bedarf der Strommessung zeigte, dass diese anwendbar ist. Der Algorithmus wurde simuliert, implementiert und experimentell getestet und zeigte gute Resultate. Die Aufgabe eines komplett unabhängigen Kurzschlussschutzes war die schwierigste. Alle möglichen Fehler innerhalb eines Moduls wurden analysiert und kategorisiert. Einige Fehlertypen können innerhalb einer Phase behandelt werden. Entsprechende Algorithmen wurden entwickelt und getestet. Allerdings gibt es Fehlertypen, die nicht durch die Steuerung einer einzelnen Phase behandelt werden können. Eine schnelle Kommunikation zwischen den drei Phasen des Konverters wäre notwendig. Alternativ könnte eine übergeordnete Steuerung diese Fehler behandeln. Zum Schluss wurde ein Demonstrator des Phasenbausteins aufgebaut und experimentell untersucht. Einige Messergebnisse werden gezeigt, um die Funktion zu verifizieren.
2

Ustuntepe, Bulent. "A Novel Two-parameter Modulation And Neutral Point Potential Control Method For The Three-level Neutral Point Clamped Inverter." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606928/index.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this thesis, the neutral point potential drift/fluctuation of the three-level neutral point clamped inverter is analyzed and a novel control algorithm, the two-parameter PWM method is proposed to confine the neutral point potential variation to a very small range. The two-parameter PWM method provides superior neutral point potential control performance even with small DC bus capacitors. The method is based on PWM pulse pattern modification and requires no additional hardware. Detailed analytical models of the neutral point current and potential as a function of the modulation parameters are established and the neutral point potential behavior is thoroughly investigated. Based on the study, the deficiency of the known methods is illustrated and the two-parameter PWM method is developed and its superior performance demonstrated. The performance of the two-parameter PWM method is verified by means of computer simulations utilizing both the per-PWM-cycle average model and the detailed model of the inverter. The results are supported by laboratory experiments involving both an R-L load and an induction motor drive.
3

Sprenger, Michael [Verfasser]. "Untersuchung des Dreipunkt - Neutral Point Clamped - Stromrichters mit Spannungszwischenkreis (3L-NPC-VSC) für Niederspannungswindkraftanwendungen / Michael Sprenger." München : Verlag Dr. Hut, 2015. http://d-nb.info/1075409365/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Jiao, Yang. "High Power High Frequency 3-level NPC Power Conversion System." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/56653.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
The high penetration of renewable energy and the emerging concept of micro-grid system raises challenges to the high power conversion techniques. Multilevel converter plays the key role in such applications and is studied in detail in the dissertation. The topologies and modulation techniques for multilevel converter are categorized at first by a thorough literature survey. The pros and cons for various multilevel topologies and modulation techniques are discussed. The 3-level neutral point clamped (NPC) topology is selected to build a 200kVA, 20 kHz power conversion system. The modularized phase leg building block of the converter is carefully designed to achieve low loss and stress for high frequency and high power operation. The switching characteristics for all the commutation loops of 3-level phase leg are evaluated by double pulse tests. The switching performance is optimized for loss and stress tradeoff. A detailed loss model is built for system loss distribution and loss breakdown calculation. Loss and stress for the phase leg and 3-phase system are quantified at all power factors. The space vector modulation (SVM) for 3-level NPC converter is investigated to achieve loss reduction, neutral voltage balance and noise reduction. The loss model and simulation model provides a quantitative analysis for loss and neutral voltage ripple tradeoff. An improved SVM method is proposed to reduce NP imbalance and switching loss simultaneously. This method also ensures an evenly distributed device loss in each phase leg and gives a constant system efficiency under different power factors. Based on the improved modulation strategy, a new modulation scheme is then proposed with largely reduced conduction loss and switching stress. Moreover, the device loss and stress distribution on a phase leg is more even. This scheme also features on the simplified implementation. The improved switching characteristics for the proposed method are verified by double pulse tests. Also the system loss breakdown and the phase leg loss distribution analysis shows the loss reduction and redistribution result. The harmonic filter for the grid interface converter is designed with LCL topology. A detailed inductor current ripple analysis derives the maximum inductor current ripple and the ripple distribution in a line cycle. The inverter side inductor is designed with the optimum loss and size trade-off. The grid side inductor is designed based on grid code attenuation requirement. Different damping circuits for LCL filter are evaluated in detail. The filter design is verified by both simulation and hardware experiment. The average model for the 3-level NPC converter and its equivalent circuit is derived with the consideration of damping circuit in both ABC and d-q frame. The modeling and control loop design is verified by transfer function measurement on real hardware. The control loops design is also tested and verified on real hardware. The interleaved DC/DC chopper is introduced at last. The different interleaving methods and their current ripple are analyzed in detail with the coupled and non-coupled inductor. An integrated coupled inductor based on 3-dimentional core structure is proposed to achieve high power density and provide both CM and DM impedance for the inductor current and output current.
Ph. D.
5

Mese, Huseyin. "Field Oriented Control Of Permanent Magnet Synchronous Motors Using Three-level Neutral-point-clamped Inverter." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614407/index.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this thesis, field oriented control of permanent magnet synchronous motors using three-level neutral-point-clamped inverter is studied. Permanent magnet synchronous motors are used in high performance drive applications. In this study, the permanent magnet synchronous motor is fed by three-level neutral-point-clamped inverter. For three-level neutral-point-clamped inverter different space vector modulation algorithms, which are reported in literature, are analyzed and compared via computer simulations. The voltage balance on dc-link capacitors is also analyzed and a software control method is implemented in conjunction with the space vector PWM modulation, utilized. Nonlinear effects such as dead-time, semiconductor voltage drop and delays in gate drive circuitries also present in neutral-point-clamped inverter. The effects of these nonlinearities are studied and a compensation method for these nonlinear effects is proposed. The theoretical results are supported with computer simulations and verified with experimental results.
6

Sprenger, Michael [Verfasser], Steffen [Akademischer Betreuer] Bernet, and Michael [Akademischer Betreuer] Braun. "Untersuchung des Dreipunkt – Neutral Point Clamped – Stromrichters mit Spannungszwischenkreis (3L-NPC-VSC) für Niederspannungswindkraftanwendungen / Michael Sprenger. Gutachter: Steffen Bernet ; Michael Braun." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://d-nb.info/107435012X/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Silva, Tiago Lemes da. "Estudo do inversor monofásico NPC T-Type de cinco níveis para processamento de energia solar fotovoltaica." Universidade do Estado de Santa Catarina, 2014. http://tede.udesc.br/handle/handle/2080.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Made available in DSpace on 2016-12-12T20:27:38Z (GMT). No. of bitstreams: 1 Tiago Lemes.pdf: 2229669 bytes, checksum: 9b9cd44356c6d0002fccf67fe418f52b (MD5) Previous issue date: 2014-09-26
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The main subject of this work is the study of a 5 levels T-Type NPC inverter topology, which is applied in photovoltaic energy processing for power generation. The grid power injection is done controlling converter current, which is injected into grid. This work presents equations, component-designs and their validation, which are necessary for the Inverter s power structure implementation. Also inverter modeling and design of implemented controllers are described. Through this study, it was possible to build a 3 kW prototype, which besides the current control, has a system to balance the differential voltage of bus capacitors. Through the prototype, experimental results were acquired.
O objeto de estudo deste trabalho é a topologia inversora NPC T-Type 5 níveis, aplicada no processamento da energia fotovoltaica, sendo o principal objetivo a geração de energia elétrica por meio do controle da corrente aplicada à rede. Este trabalho apresenta o equacionamento, projeto dos componentes e sua validação, que fazem parte da estrutura de potência do inversor, bem como a sua modelagem e projeto dos controladores implementados. Por intermédio deste estudo foi possível construir um protótipo com potência nominal de 3 kW, que além do controle da corrente, apresenta uma malha de equilíbrio da tensão diferencial do barramento. Mediante construção desse protótipo, foram extraídos os resultados experimentais.
8

Ahmadi, Sajjad. "Contribution à l'étude de la tolérance de pannes de convertisseurs multiniveaux en pont en H." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0026.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
La sûreté de fonctionnement de la conversion d’énergie est indispensable pour un grand nombre d’applications, en particulier lors de la mise en œuvre de convertisseurs multiniveaux. Par conséquent, il est important d’assurer la continuité de service de ces convertisseurs, lors de la défaillance d’un des semi-conducteurs. Dans cet objectif, ce mémoire propose un onduleur monophasé multiniveaux à tolérance de pannes, de structure Neutral Point Clamped (NPC) en pont en H, à cinq niveaux. L’algorithme de diagnostic de défaut est basé sur une étude préliminaire des modes de défaillance et repose donc sur analyse des conséquences d’un défaut, basée sur de la logique. Il ne nécessite ni modélisation des composants de l’onduleur, ni calculs complexes. Bien que moins sujettes à défaillance que les interrupteurs actifs, les diodes de clamp peuvent également être en défaut. Dans ce mémoire, l’identification d’une diode de clamp défaillante est également étudiée. De plus, un quantificateur de tension est mis en œuvre lors du diagnostic, afin d’éviter toute fausse détection en raison des erreurs de mesure et des chutes de tension dans le circuit. Suite au diagnostic d’un défaut, des mesures correctives sont appliquées afin de pouvoir assurer la tension et le courant de sortie à leurs valeurs nominales, lors de la défaillance en circuit ouvert d’un interrupteur actif, d’une diode de clamp ou d’une diode de roue libre. Le contenu harmonique des grandeurs électriques de sortie de l’onduleur n’est donc pas affecté par le défaut. La structure proposée pour l’onduleur à tolérance de pannes ne comporte ni contacteur, ni interrupteurs bidirectionnels ; les mesures correctives peuvent donc être appliquées très rapidement. Une sélection de résultats de simulation et de résultats expérimentaux illustre et démontre l’efficacité et la validité de l’approche proposée. Un défaut est détecté en 20 µs et localisé entre 20 et 60 µs après son apparition, selon le semi-conducteur défaillant (interrupteur actif ou diode de clamp)
Ensuring service continuity in safety-critical applications is indispensable. In some of these applications, the multilevel inverters play a vital role. Hence, employing a multilevel converter with fault tolerant feature is of great importance. In this regard, a fault tolerant five-level Neutral Point Clamped (NPC) inverter is proposed in this research work. The proposed fault diagnosis algorithm is based on failure mode analysis, which is a logic based approach. The realization of this strategy does not require any component modeling and complicated calculations. Although switches are more fragile than clamping diodes, clamping diodes are also subjected to breakdown. Hence, identification of a defective clamping diode is also studied in this research work. Moreover, for fault detection procedure, a voltage quantifier is proposed to avoid any misdiagnosis arising from measurement errors and voltage drop in the circuit. Following to the fault diagnosis, the proposed fault tolerant strategy aims to restore the rated voltage and current at the inverter terminal in the presence of an open-circuit fault in a switch or in a clamping or anti-parallel diode. Compared with healthy operation, harmonic content of the terminal voltage and current is not increased. The proposed fault tolerant structure does not include any contactor or bidirectional switch, which allows fast triggering of fault tolerant operation. The simulation and experimental results are presented to validate the effectiveness of the proposed approaches. A fault is detected in 20 µs and localized between 20 and 60 µs after occurrence, depending on the faulty semiconductor (switch or clamping diode)
9

Krug, Dietmar. "Vergleichende Untersuchungen von Mehrpunkt-Schaltungstopologien mit zentralem Gleichspannungszwischenkreis für Mittelspannungsanwendungen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-216245.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Die vorliegende Arbeit befasst sich mit einem detaillierten Vergleich von Mehrpunkt-Schaltungstopologien mit zentralem Gleichspannungszwischenkreis für den Einsatz in Mittelspannungsanwendungen. Im Rahmen dieser Untersuchungen wird die 3-Level Neutral Point Clamped Spannungswechselrichter Schaltungstopologie (3L-NPC VSC) sowohl mit Multilevel Flying Capacitor (FLC) als auch mit Multilevel Stacked Multicell (SMC) Schaltungstopologien verglichen, wobei unter Verwendung von aktuell verfügbaren IGBT-Modulen Stromrichterausgangsspannungen von 2.3 kV, 4.16 kV und 6.6 kV betrachtet werden. Neben der grundlegenden Funktionsweise wird die Auslegung der aktiven Leistungshalbleiter und der passiven Energiespeicher (Zwischenkreiskondensatoren, Flying Capacitors) für die untersuchten Stromrichtertopologien dargestellt. Unter Berücksichtigung verschiedener Modulationsverfahren und Schaltfrequenzen werden Kennwerte für den Oberschwingungsgehalt in der Ausgangsspannung und dem Ausgangsstrom vergleichend evaluiert. Die installierte Schalterleistungen, die Halbleiterausnutzungsfaktoren, die Stromrichterverlustleistungen sowie die Verlustleistungsverteilungen werden für die betrachteten Stromrichtertopologien detailliert gegenübergestellt und bewertet
The thesis deals with a detailed comparison of voltage source converter topologies with a central dc-link energy storage device for medium voltage applications. The Three-Level Neutral Point Clamped Voltage Source Converter (3L-NPC VSC) is compared with multilevel Flying Capacitor (FLC) and Stacked Multicell (SMC) Voltage Source Converters (VSC) for output voltages of 2.3 kV, 4.16 kV and 6.6 kV by using state-of-the-art 6.5 kV, 3.3 kV, 4.5 kV and 1.7kV IGBTs. The fundamental functionality of the investigated converter topologies as well as the design of the power semiconductors and of the energy storage devices (Flying Capacitors and Dc-Link capacitors) is described. The installed switch power, converter losses, the semiconductor loss distribution, modulation strategies and the harmonic spectra are compared in detail
10

Ngo, Van Quang Binh. "Algorithmes de conception de lois de commande prédictives pour les systèmes de production d’énergie." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC031/document.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Cette thèse vise à élaborer de nouvelles stratégies de commande basées sur la commande prédictive pour le système de génération d’énergie éolienne. La topologie des systèmes de production éolienne basées sur le Générateur Asynchrone à Double Alimentation (GADA) qui convient à des plateformes de génération dans la gamme de puissance de 1.5 à 6 MW est abordée. Du point de vue technologique, le convertisseur à trois niveaux et clampé par le neutre (3L-NPC) est considéré comme une bonne solution pour une puissance élevée en raison de ses avantages: capacité à réduire la distorsion harmonique de la tension de sortie et du courant, et augmentation de la capacité du convertisseur grâce à une tension réduite appliquée à chaque semi-conducteur de puissance. Une description détaillée de la commande prédictive à ensemble de commande fini (FCS-MPC) avec un horizon de prédiction de deux pas est présentée pour deux boucles de régulation: celle liée au convertisseur connecté au réseau et celle du convertisseur connecté au GADA. Le principe de la commande repose sur l’utilisation d’un modèle de prédiction permettant de prédire le comportement du système pour chaque état de commutation du convertisseur. La minimisation d’une fonction de coût appropriée prédéfinie permet d’obtenir la commutation optimale à appliquer au convertisseur. La thèse étudie premièrement les problèmes liées à la compensation du temps de calcul de la commande et au choix et aux pondérations de la fonction de coût. Ensuite, le problème de stabilité de la commande FCS-MPC est abordé en considérant une fonction de Lyapunov dans la minimisation de la fonction de coût. Finalement, une étude sur la compensation des effets des temps morts du convertisseur est présentée
This thesis aims to elaborate new control strategies based on Model Predictive control for wind energy generation system. We addressed the topology of doubly fed induction generator (DFIG) based wind generation systems which is suitable for generation platform power in the range in 1.5-6 MW. Furthermore, from the technological point of view, the three-level neutral-point clamped (3L-NPC) inverter configuration is considered a good solution for high power due to its advantages: capability to reduce the harmonic distortion of the output voltage and current, and increase the capacity of the converter thanks to a decreased voltage applied to each power semiconductor.In this thesis, we presented a detailed description of finite control set model predictive control (FCS-MPC) with two step horizon for two control schemes: grid and DFIG connected 3L-NPC inverter. The principle of the proposed control scheme is to use system model to predict the behaviour of the system for every switching states of the inverter. Then, the optimal switching state that minimizes an appropriate predefined cost function is selected and applied directly to the inverter.The study of issues such as delay compensation, computational burden and selection of weighting factor are also addressed in this thesis. In addition, the stability problem of FCS-MPC is solved by considering the control Lyapunov function in the design procedure. The latter study is focused on the compensation of dead-time effect of power converter
More sources

Books on the topic "Neutral-Point-Clamped (NPC)":

1

Zhang, Jun. Single-phase power supply with neutral point clamped (NPC) inverter. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Yazdani, Amirnaser. Modelling and control of the three-level neutral point diode clamped (NPC) converter for high-power applications. 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Neutral-Point-Clamped (NPC)":

1

Hakim, Denoun, Benyahia Nabil, Zaouia Mustapha, Benamrouche Nacereddine, Salah Haddad, and Sadek Ait Mamar. "Modelling and Realisation of a Three-Level PWM Inverter Using a DSP Controller to Feed an Asynchronous Machine." In Handbook of Research on Advanced Intelligent Control Engineering and Automation, 687–718. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-7248-2.ch025.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Multilevel inverters have seen an increasing popularity in the last few years for medium- and high-voltage applications. The most popular has been the three-level neutral clamped inverter. Multilevel inverters synthesize output voltage from more than two voltage levels. Thus, the output signal spectrum is significantly improved in comparison with the classical two-level converters. This chapter discusses modelling and control of a Neutral Point Clamped (NPC) inverter which operates with the PWM switching pattern using a DSP. The mathematical model of the NPC inverter is carried out using conversion and connection functions for an easier understanding of the system operation. Simulation results using MATLAB program are reported, and it is shown that the performances obtained for driving an asynchronous motor using this inverter are very promising. Finally, analysis of the theoretical and the experimental results is carried out in order to validate the effectiveness of the proposed control solution.

Conference papers on the topic "Neutral-Point-Clamped (NPC)":

1

You, Jae-Jun, Jun-Hyung Jung, Chang-Hwan Park, and Jang-Mok Kim. "Phase current reconstruction of three-level Neutral-Point-Clamped(NPC) inverter with a neutral shunt resistor." In 2017 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2017. http://dx.doi.org/10.1109/apec.2017.7931064.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

E. G. Ogoulola, Christel, Angelo J. J. Rezek, Robson B. Gonzatti, Vinicius Z. Silva, Marcos L. Ramos, Elio C. Alfonso, and Raynel D. Santos. "A New Bidirectional Three-phase Neutral Point Clamped (NPC) Grid-Connected Converter: Analysis and Simulation." In Simpósio Brasileiro de Sistemas Elétricos - SBSE2020. sbabra, 2020. http://dx.doi.org/10.48011/sbse.v1i1.2202.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This paper deals with the theoretical development, analysis, and simulation of the new topology of three-phase NPC (Neural Point Clamped) converter. The proposed 6-kW three-phase converter is connected to a three-phase electrical network and due to its bidirectional characteristics can either send energy to the grid or receive it from the grid. The classic strategy of vectorial control at the DQ synchronous reference frame, along with a simple algorithm for Unit Vector Generation (UVG), have been employed to control the line currents in the grid and the DC-bus voltage, thus substituting the PLL (Phase Locked Loop). A PWM (Pulse Width Modulation) strategy is presented in the form of an analog circuit and used for switching the semiconductors in the converter. The obtained results were verified using Matlab/Simulink software. The proposed converter has five voltage levels at the output for each phase and proven more advantageous than the conventional NPC. In addition, it was obtained a better harmonic content in the grid currents because there is very low Total Harmonic Distortion (THD) both when acting as a rectifier and as an inverter.
3

Dargahi, Vahid, Keith A. Corzine, and Arash Khoshkbar Sadigh. "A New Three-Level Active Neutral-Point-Clamped (A-NPC) Multilevel Converter Topology." In IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2019. http://dx.doi.org/10.1109/iecon.2019.8927513.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Hongliang, Yan-Fei Liu, and Paresh C. Sen. "A neutral point clamped multilevel topology flow graph and space NPC multilevel topology." In 2015 IEEE Energy Conversion Congress and Exposition. IEEE, 2015. http://dx.doi.org/10.1109/ecce.2015.7310171.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Shi, Xiuyan, Alian Chen, and Chenghui Zhang. "A neutral-point potential balancing method for Z-source neutral-point-clamped (NPC) inverters by adding the shoot-through offset." In 2014 IEEE International Power Electronics and Application Conference and Exposition (PEAC). IEEE, 2014. http://dx.doi.org/10.1109/peac.2014.7037829.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Xiaoming Yuan and I. Barbi. "A transformer assisted zero voltage switching scheme for the neutral-point-clamped (NPC) inverter." In APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285). IEEE, 1999. http://dx.doi.org/10.1109/apec.1999.750529.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Novak, Mateja, Viktor Sunde, and Zeljko Jakopovic. "Model of three level neutral point clamped converter (NPC) for grid connected photovoltaic systems." In 2015 38th International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO). IEEE, 2015. http://dx.doi.org/10.1109/mipro.2015.7160248.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Vijayan, Aathira Karuvaril, Battur Batkhishig, Mehdi Narimani, and Ali Emadi. "Optimal Low Switching Frequency PWM Pattern for a Three-Level Neutral Point Clamped (NPC) Inverter." In 2023 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2023. http://dx.doi.org/10.1109/apec43580.2023.10131500.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Sarker, Rishiraj, and Asim Datta. "An FPGA-based Dead-time Computation Technique for Neutral Point Clamped Multilevel Inverter (NPC-MLI)." In 2020 IEEE 17th India Council International Conference (INDICON). IEEE, 2020. http://dx.doi.org/10.1109/indicon49873.2020.9342594.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Mohzani, Z., B. P. McGrath, and D. G. Holmes. "The balancing properties of DC link compensation for 3-phase Neutral Point Clamped (NPC) Converter." In 2012 7th International Power Electronics and Motion Control Conference (IPEMC 2012). IEEE, 2012. http://dx.doi.org/10.1109/ipemc.2012.6258809.

Full text
APA, Harvard, Vancouver, ISO, and other styles

To the bibliography