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Dissertations / Theses on the topic 'Thyristo voltage converter'

Author: Grafiati
Published: 4 June 2025
Last updated: 1 August 2025

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1

Motto, Kevin. "Application of High-Power Snubberless Semiconductor Switches in High-Frequency PWM Converters." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35778.

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For many years, power electronics in the high-power area was performed with extremely slow semiconductor switches. These switches, including the thyristor and the Gate Turn-Off (GTO) thyristor, had the capacity to handle very high voltages and currents but lacked the ability to perform high frequency switching. Low-power converters, such as computer power supplies and low horsepower motor drives, have employed high-frequency switching for years and have benefited from very nice output waveforms, good control dynamic performance, and many other advantages compared to low frequency switching.
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2

Zhang, Bin. "Development of the Advanced Emitter Turn-Off (ETO) Thyristor." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/26095.

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Advancements in the power electronics systems have been directly related to the availability of improved power semiconductor devices. The device performance greatly determines the efficiency, reliability, volume, and cost of the power electronics system. This dissertation is dedicated to develop an advanced high power semiconductor device, the emitter turn-off (ETO) thyristor, which is targeted to improve the limitations of the present high power devices. Major improvements in electrical and mechanical designs of the ETO for high power and high frequency operation are proposed which result in
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3

Perera, Lasantha Bernard. "Multi Level Reinjection ac/dc Converters for HVDC." Thesis, University of Canterbury. Electrical and Computer Engineering, 2006. http://hdl.handle.net/10092/1085.

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A new concept, the multi level voltage/current reinjection ac/dc conversion, is described in this thesis. Novel voltage and current source converter configurations, based on voltage and current reinjection concepts are proposed. These converter configurations are thoroughly analyzed in their ac and dc system sides. The fundamentals of the reinjection concept is discussed briefly, which lead to the derivation of the ideal reinjection waveform for complete harmonic cancellation and approximations for practical implementation. The concept of multi level voltage reinjection VSC is demonst
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4

Boutry, Arthur. "Theoretical and experimental evaluation of the Integrated gate-commutated thyristor (IGCT) as a switch for Modular Multi Level Converters (MMC)." Thesis, Lyon, 2021. http://www.theses.fr/2021LYSEI095.

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Une étude sur la réduction/suppression de l'inductance de limitation di/dt pour IGCTs et du clamp RCD en utilisant des diodes rapides en silicium (Si) et des diodes en carbure de silicium (SiC) dans les convertisseurs multiniveaux modulaires (MMC). Cette thèse contient :- Analyse des sous-modules de MMC HVDC existants.- Évaluation de l'intérêt des IGCTs dans les sous-modules MMC HVDC et comparaison des pertes avec les IGBT, en utilisant des facteurs de mérite spécifiques aux MMC créés dans cette thèse.- Test de double pulse avec diode à récupération rapide dans un module plastique pour tenter
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5

Andler, Daniel [Verfasser]. "Experimental Investigation of Three-Level Active Neutral Point Clamped Voltage Source Converters using Integrated Gate-Commutated Thyristors / Daniel Andler." München : Verlag Dr. Hut, 2014. http://d-nb.info/1051550092/34.

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6

Andler, Osorio Daniel Andrés [Verfasser]. "Experimental Investigation of Three-Level Active Neutral Point Clamped Voltage Source Converters using Integrated Gate-Commutated Thyristors / Daniel Andler." München : Verlag Dr. Hut, 2014. http://d-nb.info/1051550092/34.

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7

Xie, Hailian. "On Power-system Benefits, Main-circuit Design, and Control of StatComs with Energy Storage." Doctoral thesis, Stockholm : Skolan för elektro- och systemteknik, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10302.

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8

Hadjikypris, Melios. "Supervisory control scheme for FACTS and HVDC based damping of inter-area power oscillations in hybrid AC-DC power systems." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/supervisory-control-scheme-for-facts-and-hvdc-based-damping-of-interarea-power-oscillations-in-hybrid-acdc-power-systems(cc03b44a-97f9-44ec-839f-5dcbcf2801f1).html.

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Modern interconnected power systems are becoming highly complex and sophisticated, while increasing energy penetrations through congested inter-tie lines causing the operating point approaching stability margins. This as a result, exposes the overall system to potential low frequency power oscillation phenomena following disturbances. This in turn can lead to cascading events and blackouts. Recent approaches to counteract this phenomenon are based on utilization of wide area monitoring systems (WAMS) and power electronics based devices, such as flexible AC transmission systems (FACTS) and HVDC
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9

Zabihi, Sasan. "Flexible high voltage pulsed power supply for plasma applications." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48137/1/Sasan_Zabihi_Sheykhrajeh_Thesis.pdf.

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Demands for delivering high instantaneous power in a compressed form (pulse shape) have widely increased during recent decades. The flexible shapes with variable pulse specifications offered by pulsed power have made it a practical and effective supply method for an extensive range of applications. In particular, the release of basic subatomic particles (i.e. electron, proton and neutron) in an atom (ionization process) and the synthesizing of molecules to form ions or other molecules are among those reactions that necessitate large amount of instantaneous power. In addition to the decompositi
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10

Bonnin, Xavier. "Alimentation électrique des dispositifs de décharge à barrière diélectrique." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/13645/1/bonnin.pdf.

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Les dispositifs DBD se répandent dans un grand nombre d’applications industrielles. Utilisés depuis plus de 150 ans pour la production d’ozone afin de décontaminer l’eau à grande échelle, ils ont depuis la fin du XXème siècle investi les domaines du traitement de surface polymère, du dépôt de couche mince sur substrat et de l’émission lumineuse pour la décontamination ainsi que la médecine. Ces dispositifs sont mis en oeuvre avec un générateur électrique dont les caractéristiques impactent fortement la qualité de la décharge. Ce travail s’inscrit en partie dans le cadre du développement d’une
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11

Pascal, Jean-Pierre. "Etude de circuits d'aide à la commutation de thyristors GTO montés en série pour des applications à la traction ferroviaire." Paris 6, 1986. http://www.theses.fr/1986PA066273.

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Revue des propriétés des thyristors interrupteurs. Aptitude à l'utilisation en grande traction. Etude du rétablissement de la tension aux bornes. Soufflage et mise en série des thyristors interrupteurs. Caractérisation des GTO de grande puissance.
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12

Laamiri, Saber. "Commande des systèmes électriques : machines synchrones et convertisseurs multi-niveaux." Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0031/document.

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Ce travail de thèse a pour objectifs l'observation et la commande des convertisseurs multi-niveaux et la commande des machines synchrones. Pour satisfaire le besoin des clients de l’entreprise GS Maintenance et pour des raisons de maintenance, une commande en courant de la machine synchrone est implémentée expérimentalement. L'accent est mis sur le démarrage de ce type de machines car durant ces phases de fonctionnement (basses vitesses), les forces électromotrices sont faibles pour assurer la commutation des thyristors de l'onduleur. Ensuite, l'entreprise a proposé à ses clients un convertiss
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13

Гаврилюк, Ігор Миколайович, та Havryliuk Ihor. "Розробка проекту лінії електропередачі з вставкою постій¬ного струму". Master's thesis, ТНТУ імені Івана Пулюя, 2019. http://elartu.tntu.edu.ua/handle/lib/29562.

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В дипломній роботі виконано дослідження можливих варіантів об’єднання несинхронних електроенергетичних систем та систем з різними стандартами регулювання частоти. Метою роботи є розробка лінії електропередачі «Ковель – Хелм» з вставкою постійного струму для продажу електроенергії з України у Польщу. Об’єкти, аналогічні спроектованому у даному проекті, можна впровад¬жувати і в інших елек-тричних мережах, що дозволить значно зменшити розміри синхронних мереж змінного струму, запобігти або обмежити каскадні відключення, підвищити коефіцієнт корисної дії електромереж і надійність електроенергети
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14

Tewari, Karan. "Investigation of high temperature operation emitter turn off thyristor (ETO) and electro thermal design of heatpipe based high power voltage source converter using ETO." 2006. http://www.lib.ncsu.edu/theses/available/etd-08142006-235205/unrestricted/etd.pdf.

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15

Joshi, T. G. Subhash. "Power Electronic Technologies for Medium and High Power High Voltage Power Supplies." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4322.

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The performance of systems used in various high voltage applications depend majorly on the output voltage ripple of High Voltage Power Supplies (HVPS). One of the failure mode of microwave tube (MWT) commonly used in these applications is due to the energy accumulation above the specified limit during fault events due to higher stored energy in HVPS. This demands either a protection for MWT or reduced ripple voltage without increasing the stored energy. This thesis investigates a protection device for MWT that operate with MW power level HVPS, and design method to reduce the output voltage ri
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