Relevant bibliographies by topics / High-voltage direct current (HVDC) / Dissertations / Theses
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Dissertations / Theses on the topic 'High-voltage direct current (HVDC)'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Cwikowski, Oliver. "Synthetic testing of high voltage direct current circuit breakers." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/synthetic-testing-of-high-voltage-direct-current-circuit-breakers(2f15e62f-8b2c-4e29-884e-323b90af2d11).html.

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The UK is facing two major challenges in the development of its electricity network. First, two thirds of the existing power stations are expected to close by 2030. Second, is the requirement to reduce its CO2 emissions by 80% by 2050. Both of these challenges are significant in their own right. The fact that they are occurring at the same time, generates a significant amount of threats to the existing power system, but also provides many new opportunities. In order to meet both these challenges, significant amounts of offshore wind generation has been installed in the UK. For the wind generat
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2

Giraneza, Martial. "High voltage direct current (HVDC) in applications for distributed independent power providers (IPP)." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1077.

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Thesis submitted in fulfillment of the requirements for the degree Master of Technology: Electrical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2013<br>The development of power electronics did remove most of technical limitations that high voltage direct current (HVDC) used to have. HVDC, now, is mostly used for the transmission of bulk power over long distances and for the interconnection of asynchronous grid. Along with the development of the HVDC, the growth of power demand also increased beyond the utilities capacities. Besides the on-going incr
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3

Jimenez, Carrizosa Miguel. "Hierarchical control scheme for multi-terminal high voltage direct current power networks." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112039/document.

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Cette thèse traite de la commande hiérarchique de réseaux à courant continu multi-terminaux à haute tension (MT-HVDC) intégrant des sources d'énergie renouvelables à grande échelle. Le schéma de contrôle proposé est composé de quatre ‘couches’ : le contrôle local où se trouvent les convertisseurs de puissance, avec une échelle de temps de l’ordre de la milliseconde ; le contrôle primaire qui est décentralisé et appliqué à plusieurs terminaux avec une échelle du temps de l’ordre de la seconde ; un niveau de commande où la communication est prise en compte et où l’approche de Modèle du Commande
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4

Ridenour, Daniel Keith. "Examination of Power Systems Solutions Considering High Voltage Direct Current Transmission." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/63927.

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Since the end of the Current Wars in the 19th Century, alternating current (AC) has dominated the production, transmission, and use of electrical energy. The chief reason for this dominance was (and continues to be) that AC offers a way minimize transmission losses yet transmit large power from generation to load. With the Digital Revolution and the entrance of most of the post-industrialized world into the Information Age, energy usage levels have increased due to the proliferation of electrical and electronic devices in nearly all sectors of life. A stable electrical grid has become synon
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Krige, Ernst. "Harmonic interaction between weak AC systems and VSC-based HVDC schemes." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71704.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The implementation of the Caprivi Link Interconnector (CLI) High Voltage Direct Current (HVDC) scheme in 2010 connecting the weak Namibian and Zambian Alternating Current (AC) transmission networks via overhead line is based on Voltage Source Converter (VSC) technology. This world-first combination of attributes presents a unique opportunity to study harmonic interaction between weak AC systems and VSC-based HVDC schemes. Relatively few publications exist that focus on AC and DC harmonic interaction and very few refer to VSC
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Farr, Ewan Mark. "Modelling, control and implementation of the alternate arm converter (AAC) : a new topology for high voltage direct current (HVDC) applications." Thesis, University of Nottingham, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.718463.

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Conventional electricity generation, transmission and distribution infrastructures are AC systems, which combine to form an AC grid. Supply security can be increased by interconnecting AC grids. Additionally, there is an increasing reliance on remote asyn-chronous distributed generation from bulk renewable energy sources. High Voltage Direct Current (HVDC) systems allow asynchronous AC networks to be connected, and are able to transmit bulk power over longer distances with a lower total cost-than High Voltage Alternating Current (HVAC) transmission, or are perhaps the only option. At both ends
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7

Bonkarev, Maxim [Verfasser], and Harald [Akademischer Betreuer] Schwarz. "Concept analysis for High-Voltage Direct-Current circuit breakers for application in a network of HVDC transmission / Maxim Bonkarev ; Betreuer: Harald Schwarz." Cottbus : BTU Cottbus - Senftenberg, 2015. http://d-nb.info/1114283959/34.

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8

Otto, Abraham Johannes. "Direct current conductor corona modelling and metrology." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1497.

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Thesis (PhD (Electrical and Electronic Engineering))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: Prospects of up-rating existing high voltage direct current (HVDC) transmission schemes, as well as the conversion of existing alternating current (AC) to direct current (DC) lines and the development of new HVDC schemes in sub-Saharan Africa, have led to renewed interest in DC research. The radio interference (RI), audible noise (AN) and corona loss (CL) performance of HVDC transmission lines are critical factors when assessing the reliability of the line design. The RI performanc
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9

Samborsky, Michael [Verfasser], Harald [Gutachter] Schwarz, Harald [Gutachter] Fien, and Heinz-Helmut [Gutachter] Schramm. "Conceptual aspects of future High Voltage Direct Current (HVDC) electrical power transmission networks / Michael Samborsky ; Gutachter: Harald Schwarz, Harald Fien, Heinz-Helmut Schramm." Cottbus : BTU Cottbus - Senftenberg, 2017. http://d-nb.info/1149052465/34.

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10

Reynes, Hugo. "Conception d'un module électronique de puissance pour application haute tension." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI035.

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Satisfaire les besoins en énergie de manière responsable est possible grâce aux énergies renouvelables, notamment éoliennes et solaires. Cependant ces centres de captation d’énergie sont éloignés dans zones de consommation. Le transport de l’énergie via des réseaux HVDC (haute tension courant continu) permet un rendement et une flexibilité avantageuse face au transport HVAC (haute tension courant alternatif). Ceci est rendu possible grâce aux convertisseurs utilisant l’électronique de puissance. Les récents développements sur les semi-conducteurs à large bande interdite, plus particulièrement
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11

Diban, Bassel. "Life Estimation of HVDC Cables Subjected to Qualification Test Conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18955/.

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The goal of the Master Thesis is estimating the life of HVDC XLPE-insulated cables subjected to the Qualification Tests conditions according to CIGRÉ Technical Brochure 496 and for different values of the coefficients (a) and (b). During the Electrical Type Test (TT), a series of load cycles (LC) with DC voltage UT=1.85 U0 (rated voltage) are applied in three stages, i.e.: • 12 cycles lasting 24 hours each with a negative polarity of the applied voltage (12 days). • 12 cycles lasting 24 hours each with a positive polarity of the applied voltage (12 days). • 3 cycles lasting 48 hours each w
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Mouton, Gerton Nicolaas Jacobus. "An evaluation of different material line insulators under high voltage AC and bipolar DC excitation in a marine polluted environment." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71940.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The worldwide increase in the popularity of high voltage direct current (HVDC) power transmission application has led to questions regarding the performance of high voltage alternating current (HVAC) insulators when energized under HVDC excitation. These questions have led researchers conduct numerous research projects worldwide. A particular question NamPower (the power utility in Namibia) has faced is: how do these insulators perform and age when energized under HVDC excitation in heavily polluted environments? This questio
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13

Akkari, Samy. "Contrôle d'un système multi-terminal HVDC (MTDC) et étude des interactions entre les réseaux AC et le réseau MTDC." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC069/document.

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La multiplication des projets HVDC de par le monde démontre l'engouement toujours croissant pour cette technologie de transport de l'électricité. La grande majorité de ces transmissions HVDC correspondent à des liaisons point-à-point et se basent sur des convertisseurs AC/DC de type LCC ou VSC à 2 ou 3 niveaux. Les travaux de cette thèse se focalisent sur l'étude, le contrôle et la commande de systèmes HVDC de type multi-terminal (MTDC), avec des convertisseurs de type VSC classique ou modulaire multi-niveaux. La première étape consiste à obtenir les modèles moyens du VSC classique et du MMC.
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Mushagala, Jimmy Matabaro. "Harmonic analysis and effectiveness of mitigation techniques applied to a bipolar HVDC system." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2461.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2017.<br>High Voltage Direct Current (HVDC) transmission is a safe and efficient technology designed to deliver large amounts of electrical power over long distances with minimal losses and at low costs. HVDC links require converters and filters at both terminal stations. The core component of the HVDC system is the power converter that connects the DC and AC systems together. The conversion from AC to DC, and vice versa, is achieved mainly through electronic switches called thyristors. The thyristor-based Line C
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15

Zavattoni, Laëtitia. "Conduction phenomena through gas and insulating solids in HVDC gas insulated substations, and consequences on electric field distribution." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT063/document.

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L'émergence des énergies renouvelables a entraîné le développement de nouvelles technologies pour la distribution de l'énergie sur de longues distances. Ces dernières sont basées sur le transport via de hautes tensions continues (HVDC) pour éviter les pertes capacitives. Ce réseau de distribution est interconnecté via des Postes Sous Enveloppes Métalliques (PSEM), dont l'isolation est composée de gaz sous pression (SF6) et d'isolants solides (résine époxy), qui doivent résister sous HVDC. Dans ces dispositifs, le champ électrique n'est plus déterminé par la permittivité relative des matériaux,
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Marten, Anne-Katrin [Verfasser], Dirk [Akademischer Betreuer] Westermann, Dirk Van [Akademischer Betreuer] Hertem, and Jutta [Akademischer Betreuer] Hanson. "Operation of meshed high voltage direct current (HVDC) overlay grids : from operational planning to real time operation / Anne-Katrin Marten. Betreuer: Dirk Westermann. Gutachter: Dirk Van Hertem ; Jutta Hanson." Ilmenau : Universitätsbibliothek Ilmenau, 2015. http://d-nb.info/1082134775/34.

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Marten, Anne-Katrin Verfasser], Dirk [Akademischer Betreuer] [Westermann, Hertem Dirk [Akademischer Betreuer] Van, and Jutta [Akademischer Betreuer] Hanson. "Operation of meshed high voltage direct current (HVDC) overlay grids : from operational planning to real time operation / Anne-Katrin Marten. Betreuer: Dirk Westermann. Gutachter: Dirk Van Hertem ; Jutta Hanson." Ilmenau : Universitätsbibliothek Ilmenau, 2015. http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2015000216.

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Marten, Anne-Katrin Verfasser], Dirk [Akademischer Betreuer] Westermann, Hertem Dirk [Akademischer Betreuer] [Van, and Jutta [Akademischer Betreuer] Hanson. "Operation of meshed high voltage direct current (HVDC) overlay grids : from operational planning to real time operation / Anne-Katrin Marten. Betreuer: Dirk Westermann. Gutachter: Dirk Van Hertem ; Jutta Hanson." Ilmenau : Universitätsbibliothek Ilmenau, 2015. http://d-nb.info/1082134775/34.

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19

Suzuki, Nayara Yuko. "Estudo de controle e proteção para sistemas de transmissão HVDC multiterminais baseados em conversores modulares multiní­veis." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-20092018-112205/.

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O crescente interesse por sistemas de transmissão do tipo VSC-based HVDC (VSCHVDC) como alternativa aos atuais tem levado à necessidade de estudos sobre o principal desafio associado à sua implantação, que é o desenvolvimento de um esquema de proteção que seja rápido e que identifique a zona de proteção na qual uma eventual falta tenha ocorrido, respeitando-se assim o princípio de seletividade. Para estudo de um sistema de proteção que atenda a estes requisitos, foi utilizada neste trabalho uma rede com quatro terminais e transmissão High-Voltage Direct Current (HVDC), implementada com convers
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20

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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Shinoda, Kosei. "Contrôle et opération des réseaux HVDC multi-terminaux à base de convertisseurs MMC." Thesis, Ecole centrale de Lille, 2017. http://www.theses.fr/2017ECLI0017.

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Cette thèse porte sur la commande de réseaux multi-terminaux à courant continu (MTDC) basés sur des convertisseurs multiniveaux modulaires (MMCs).Tout d’abord, notre attention se focalise sur l'énergie stockée en interne dans le MMC qui constitue un degré de liberté additionnel apporté par sa topologie complexe. Afin d’en tirer le meilleur parti, les limites de l’énergie interne sont formulées mathématiquement.Afin de maîtriser la dynamique de la tension DC, l’utilisation de ce nouveau degré de liberté s’avère d’une grande importance. Par conséquent, une nouvelle de stratégie de commande, nomm
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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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Achenbach, Sven. "Beiträge zur analytischen Berechnung und Reduktion der aus Netzspannungsunsymmetrien resultierenden Harmonischen in Systemen der Hochspannungs-Gleichstrom-Übertragung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-38968.

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An AC system’s voltage unbalance by a fundamental frequency negative sequence system is usually the main cause for the emission of non-characteristic harmonics by current source converters as used in conventional HVDC systems. This emission takes place on both sides of each 12-pulse converter. On the DC side mainly a 2nd harmonic voltage appears driving a 2nd harmonic current. The magnitude of this harmonic current can exceed the magnitudes of the characteristic harmonics even if no low order resonance exists. Further non-characteristic harmonics generated by the converter under such unbalance
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Pallon, Love. "Polyethylene/metal oxide nanocomposites for electrical insulation in future HVDC-cables : probing properties from nano to macro." Doctoral thesis, KTH, Polymera material, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-193591.

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Nanocomposites of polyethylene and metal oxide nanoparticles have shown to be a feasible approachto the next generation of insulation in high voltage direct current cables. In order to reach an operationvoltage of 1 MV new insulation materials with reduced conductivity and increased breakdown strengthas compared to modern low-density polyethylene (LDPE) is needed.In this work polyethylene MgO nanocomposites for electrical insulation has been produced andcharacterized both from an electrical and material perspective. The MgO nanoparticles weresynthesized into polycrystalline nanoparticles with
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Samimi, Shabab. "Modélisation et commande des convertisseurs MMC en vue de leur intégration dans le réseau électrique." Thesis, Ecole centrale de Lille, 2016. http://www.theses.fr/2016ECLI0014/document.

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Le système de transport d’électricité doit évoluer pour satisfaire les besoins du marché de l’électricité et de l’insertion de la production renouvelable. Les systèmes de transport dits HVDC se développent. Les interfaces d’électroniques de puissance vont jouer un rôle majeur et doivent faire preuve d’une extrême fiabilité, d’une grande efficacité et rester économiquement abordables.La technologie MMC (Convertisseur Modulaire Multi-niveaux) connaît un essor par rapport à des technologies classiques, comme le convertisseur trois-niveaux. Sa topologie étant complexe, deux niveaux de contrôle peu
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Steckler, Pierre-Baptiste. "Contribution à la conversion AC/DC en Haute Tension." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI075.

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Le courant alternatif (AC) se prêtant bien à la majorité des problématiques de production, de transport et de distribution de l'électricité, on comprend qu'il soit massivement utilisé. Cependant, depuis plus d'un siècle, les bénéfices du courant continu haute tension (HVDC, pour High Voltage Direct Current) pour les longues distances sont bien connus. Aux interfaces, des convertisseurs AC/DC sont requis, leur composition évoluant au fil des avancées technologiques. Après avoir présenté les spécificités du HVDC et les contraintes qu'il introduit sur les convertisseurs AC/DC, ce manuscrit se foc
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Freye, Claudius [Verfasser], Frank [Akademischer Betreuer] Jenau, and Thomas [Gutachter] Leibfried. "Methoden und Aspekte zur Leitfähigkeitsanalyse von Isolationsmaterialien der Kabeltechnologie und zur Isolationskoordination für Systeme der Hochspannungsgleichstromübertragung (HGÜ) : Methods and aspects for conductivity analysis of insulating materials in cable technology and for insulation coordination in high-voltage direct current transmission (HVDC) systems / Claudius Freye ; Gutachter: Thomas Leibfried ; Betreuer: Frank Jenau." Dortmund : Universitätsbibliothek Dortmund, 2020. http://d-nb.info/1214887627/34.

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Mbolo, Noah Phanuel Séraphine. "Développement d’une méthode de mesure de charges d’espace appliquée aux isolateurs de postes sous enveloppe métallique (PSEM) pour la haute tension à courant continu." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTS038/document.

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En permettant la transmission de fortes puissances sur de grandes distances, les réseaux en haute tension à courant continu (HTCC) représentent l'avenir du transport de l'énergie électrique. Des équipements tels que les postes sous enveloppe métallique (PSEM) seront indispensables dans ces réseaux pour répartir le flux d'énergie, interrompre ou isoler certaines branches. Leur conception nécessite la prise en compte, pour les parties isolantes, de phénomènes spécifiques liés à l’application de champs électriques continus, comme la dépendance de la résistivité avec le champ et la température, ma
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Bui, Thi Thanh Huyen. "Terminaisons verticales de jonction remplies avec des couches diélectriques isolantes pour des application haute tension utilisant des composants grand-gap de forte puissance." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI061/document.

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Le développement de l’énergie renouvelable loin des zones urbaines demande le transport d'une grande quantité d’énergie sur de longues distances. Le transport d’électricité en courant continu haute tension (HVDC) présente beaucoup d’avantages par rapport à celui en courant alternatif. Dans ce contexte il est nécessaire de développer des convertisseurs de puissance constitués par des composants électroniques très haute tension, 10 à 30 kV. Si les composants en silicium ne peuvent pas atteindre ces objectifs, le carbure de silicium (SiC) se positionne comme un matériau semiconducteur alternatif
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Boudjelthia, H. "Corona suppression on high voltage direct current systems." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235291.

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Zhang, Yushu. "Multilevel voltage source converters in high voltage direct current transmission systems." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25814.

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This research focuses on voltage source multilevel converters in high voltage direct current (HVDC) transmission systems. The first Voltage Source Converter based HVDC (VSC-HVDC) systems with series connected IGBTs in a two-level converter represented a solution to meet industrial and economical requirements but is associated with significant drawbacks such as high dv/dt and di/dt, high switching loss, and poor output voltage and current quality. To overcome these issues, the multilevel converter was proposed for HVDC application. The Modular Multilevel Converter (M2C) was the first multilevel
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Balasubramaniam, Senthooran. "Series current flow controllers for high voltage direct current transmission grids." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/104744/.

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Large scale grid integration of renewables and cross country border energy exchange may be facilitated by multi-terminal high-voltage direct-current (MTdc) grids. However, as the number of terminals and dc lines increases, power flow management between dc nodes becomes amajor challenge. The current carrying capability of dc lines is limited by their thermal and electric stress limits. Thus, the line current must be maintained within the permissible operational region to protect the lines fromdamages. This thesis addresses this fundamental issue through the introduction of inter-line current fl
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Luth, Thomas. "DC/DC converters for high voltage direct current transmission." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24466.

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High Voltage Direct Current (HVDC) transmission has to date mostly been used for point-to-point projects, with only a few select projects being designed from the outset to incorporate multiple terminals. Any future HVDC network is therefore likely to evolve out of this pool of HVDC connections. As technology improves, the voltage rating, at the point of commission, of the these connections increases. Interconnection therefore requires the DC equivalent of the transformer, to bridge the voltage levels and create a multi-terminal network. This thesis investigates new potential DC/DC converter to
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Cheah, Marc. "Offshore wind integration through high voltage direct current systems." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/101463/.

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Offshore wind generation has an important role in the transition to renewable energy. In particular, HVDC-connected Offshore Wind Power Plants (OWPPs) are emerging as an economical solution for long distances from the shore. This thesis was focused on three key areas related to planning, operation and stability issues, which are present technical challenges in the integration of OWPPs through VSC-HVDC transmission systems. In relation to planning, the installation of interlink cables between OWPPs was analysed to increase the wind power transfer. Different interlink options were compared based
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Holmgren, Jens. "Investigation of alternative current measurements in high-voltage applications." Thesis, Linköping University, Department of Science and Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8149.

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<p>ABB:s MACH2 system uses a number of currents to ignite thyristors for AC/DC-trassfformation and they are measured for control and protection. The measurement methods used today has major drawbacks. Two alternative techniques are investigated, one based on the Hall-Effect (HED) and the other based on Anisotropic Magnetoreistanse (AMR), both techniques sensing the magnetic field produced by currents in a conductor. The HED hawe low sensitivity so some kind of flux concentrators is needed. This adds volume, costs and complexity to the device. The AMR technique is much more sensitive than the H
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Bhattacharya, Subroto. "Simulation of transient phenomena in high voltage direct-current converter systems." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26959.

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In this thesis models for the simulation of transient phenomena in high voltage direct-current systems are developed. The new converter model is versatile and the solution algorithm is free from numerical oscillations. A new generic inverter control described in this thesis is based on a predictive approach. Steady-state and transient simulations of two-terminal and multi-terminal (i.e., a parallel converter system) high voltage direct-current systems are carried out using the new converter system model. Comparison between the two-terminal transient simulation results and the high voltage dire
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37

Livermore, Luke. "Integration of offshore wind farms through High Voltage Direct Current networks." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/42892/.

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The integration of offshore wind farms through Multi Terminal DC (MTDC) networks into the GB network was investigated. The ability of Voltage Source Converter (VSC) High Voltage Direct Current (HVDC) to damp Subsynchronous Resonance (SSR) and ride through onshore AC faults was studied. Due to increased levels of wind generation in Scotland, substantial onshore and offshore reinforcements to the GB transmission network are proposed. Possible inland reinforcements include the use of series compensation through fixed capacitors. This potentially can lead to SSR. Offshore reinforcements are propos
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Tiancheng, Zhang, and Zhang Yunlin. "High voltage Direct Current lines in the Chinese electric power system." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12757.

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39

Gowaid, Islam Azmy. "DC-DC converter designs for medium and high voltage direct current systems." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27933.

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DC fault protection is one challenge impeding the development of multi-terminal dc grids. The absence of manufacturing and operational standards has led to many point-to-point HVDC links built at different voltage levels, which creates another challenge. Therefore, the issues of voltage matching and dc fault isolation in high voltage dc systems are undergoing extensive research and are the focus of this thesis. The modular multilevel design of dual active bridge (DAB) converters is analysed in light of state-of-the-art research in the field. The multilevel DAB structure is meant to serve mediu
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Myhre, Jørgen Chr. "Electrical Power Supply to Offshore Oil Installations by High Voltage Direct Current Transmission." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-383.

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<p>This study was initiated to investigate if it could be feasible to supply offshore oil installations in the North Sea with electrical power from land. A prestudy of alternative converter topologies indicated that the most promising solution would be to investigate a conventional system with reduced synchronous compensator rating.</p><p>The study starts with a summary of the state of power supply to offshore installations today, and a short review of classical HVDC transmission. It goes on to analyse how a passive network without sources influences the inverter. The transmission, with its cu
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湯世傑 and Sai-kit Tong. "A computer-aided measurement system for monopolar high-voltage direct-current coronating lines." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207467.

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PLAISANT, ANDRE LUIZ DA ROSA. "DYNAMIC SIMULATION OF HIGH VOLTAGE DIRECT CURRENT TRANSMISSION SYSTEMS IN A PERSONAL COMPUTER." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1991. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8803@1.

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CENTRO DE PESQUISA DE ENERGIA ELÉTRICA<br>Este trabalho trata do desenvolvimento e implementação de software destinado à simulação dinâmica de sistemas de transmissão 3m corrente contínua em microcomputador digital. A formulação matemática para a solução das equações diferenciais baseia-se nas vaiáveis de estado do sistema, e o método de integração numérica utilizado é o de Eüler Modificado. O modelo dinâmico de máquina síncrona é representado em suas grandezas de fase a, b, c. O programa digital conta, ainda, com telas gráficas para a visualização de resultados.<br>This work is conce
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43

Tong, Sai-kit. "A computer-aided measurement system for monopolar high-voltage direct-current coronating lines /." [Hong Kong] : University of Hong Kong, 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12321771.

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44

Chen, Yijing. "Nonlinear Control and Stability Analysis of Multi-Terminal High Voltage Direct Current Networks." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112041/document.

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Cette thèse a été consacrée à l'étude des réseaux multi-terminaux haute tension à courant continu (MTDC). Les principales contributions étaient dans le domaine du contrôle automatique non linéaire, appliquées aux systèmes électriques, électronique de puissance et les sources d'énergie renouvelables. Le travail de recherche a été lancé avec l'intention de combler certaines lacunes entre la théorie et la pratique, en particulier: 1) d'enquêter sur diverses approches de contrôle pour le but d'améliorer la performance des systèmes MTDC; 2) d'établir des connexions entre la conception du contrôle e
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45

Adeuyi, Oluwole Daniel. "Grid connection of offshore wind farms through multi-terminal high voltage direct current networks." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/90288/.

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This thesis investigated the capability of multi-terminal high voltage direct current (HVDC) networks based on voltage source converter (VSC) technology to transfer power generated from offshore wind farms to onshore grids and interconnect the grids of different countries. Variable speed wind turbines and other low-carbon generators or loads that are connected through inverters do not inherently contribute to the inertia of AC grids. A coordinated control scheme for frequency support from multi-terminal VSC-HVDC (MTDC) scheme was designed to transfer additional power to AC grids from the kinet
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46

Tzelepis, Dimitrios. "Protection, fault location & control in high voltage multi terminal direct current (HV-MTDC) grids." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28877.

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With an increased penetration of renewable energy sources, balancing the supply and demand is likely to be one of the major challenges in future power systems. Consequently, there is a growing need for meshed interconnections between countries in order to effectively share the available power capacity and thereby increase operational exibility and security of supply. This has been raised as a major issue in Europe but also in Asia and United States of America. The concept of supergrid has been identifed as a possible solution towards a newback bone transmission system, permitting massive integ
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47

Smith, Johan. "High voltage direct current strategy solving power delivery shortages to localized area of national grid." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1102.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2009<br>The industrial and population growth of a nation can cause power delivery problems to localized areas of a national grid through their increased demand for electrical energy. One reason for these power shortages is the insufficient current carrying capacity of existing high voltage alternating current, (HVAC), transmission lines supplying the area. High voltage direct current (HVDC) transmission lines are a possible solution as they provide better power delivery than HVAC lines. New or upgrade
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Jiang, Xu [Verfasser]. "Protection Schemes for Modular Multilevel Converter Based High Voltage Direct Current Transmission System Converters / Xu Jiang." Aachen : Shaker, 2019. http://d-nb.info/1188550845/34.

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Dchar, Ilyas. "Conception d’un module d’électronique de puissance «Fail-to-short» pour application haute tension." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI042/document.

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Les convertisseurs de forte puissance sont des éléments critiques des futurs réseaux HVDC. À ce titre, leur fiabilité et leur endurance sont primordiales. La défaillance d’un composant se produit soit en circuit ouvert, ou en court-circuit. Le composant défaillant en circuit ouvert est inadmissible pour les convertisseurs utilisant une topologie de mise en série. En particulier, dans certaines applications HVDC, les modules doivent être conçus de telle sorte que lorsqu'une défaillance se produit, le module défaillant doit se comporter comme un court-circuit et supporter ainsi le courant nomina
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SILVA, MÁRCIO THELIO FERNANDES DA. "DESIGN & DEVELOPMENT OF A STANDARD FOR HIGH VOLTAGE IN DIRECT CURRENT IN THE RANGE OF 1 KV TO 50 KV." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=17889@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Metrologia e qualidade estão intimamente relacionadas e constituem-se em poderoso instrumento de transformação da infraestrutura tecnológica de países e organizações. O avanço do desenvolvimento científico e tecnológico está fortemente embasado no avanço da metrologia. O Instituto Nacional de Metrologia, Normalização e Qualidade industrial (INMETRO) é o órgão máximo responsável pela conservação e manutenção das unidades de base e derivadas do Sistema Internacional de Unidades (SI) no país. A grandeza tensão em corrente contínua, até 1 kV, e
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