Relevant bibliographies by topics / Direct Current Converter (DC/DC)

Academic literature on the topic 'Direct Current Converter (DC/DC)'

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Published: 8 June 2024

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Contents

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

Journal articles on the topic "Direct Current Converter (DC/DC)":

1

Hamadou, Aissatou. "Implementation of direct current to direct current converter exploiting power amplifier." Annals of Electrical and Electronic Engineering 3, no. 3 (March 2020): 1–7. http://dx.doi.org/10.21833/aeee.2020.02.002.

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In the last years, RF power amplifiers are taking advantage of the switched dc-dc converters to use them in several architectures that may improve the efficiency of the amplifier, keeping good linearity. In this study a DC-DC power converter design suitable for high-frequency applications by using a class E power amplifier (Inverter), instead of using small battery values choosing Radio Frequency (RF) values and getting high efficiency of output voltage and a maximum of current and voltage values between 0-9 mW of power input in rectifier, the class E power amplifier designed by using GaN HEMT device and the power added efficiency of 64% after getting optimization of matching network and the gain is 14.4 dBm.
2

Hamadou, Aissatou. "Implementation of direct current to direct current converter exploiting power amplifier." Annals of Electrical and Electronic Engineering 3, no. 3 (March 2020): 1–7. http://dx.doi.org/10.21833/aeee.2020.03.001.

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In the last years, RF power amplifiers are taking advantage of the switched dc-dc converters to use them in several architectures that may improve the efficiency of the amplifier, keeping good linearity. In this study a DC-DC power converter design suitable for high-frequency applications by using a class E power amplifier (Inverter), instead of using small battery values choosing Radio Frequency (RF) values and getting high efficiency of output voltage and a maximum of current and voltage values between 0-9 mW of power input in rectifier, the class E power amplifier designed by using GaN HEMT device and the power added efficiency of 64% after getting optimization of matching network and the gain is 14.4 dBm.
3

Liu, Zhengxin, Jiuyu Du, and Boyang Yu. "Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles." World Electric Vehicle Journal 11, no. 4 (October 7, 2020): 64. http://dx.doi.org/10.3390/wevj11040064.

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Direct current to direct current (DC/DC) converters are required to have higher voltage gains in some applications for electric vehicles, high-voltage level charging systems and fuel cell electric vehicles. Therefore, it is greatly important to carry out research on high voltage gain DC/DC converters. To improve the efficiency of high voltage gain DC/DC converters and solve the problems of output voltage ripple and robustness, this paper proposes a double-boost DC/DC converter. Based on the small-signal model of the proposed converter, a double closed-loop controller with voltage–current feedback and input voltage feedforward is designed. The experimental results show that the maximum efficiency of the proposed converter exceeds 95%, and the output voltage ripple factor is 0.01. Compared with the traditional boost converter and multi-phase interleaved DC/DC converter, the proposed topology has certain advantages in terms of voltage gain, device stress, number of devices, and application of control algorithms.
4

Uma Maheswari, S., and K. V. Kandasamy. "Development of Zeta Converter for Permanent Magnet Brushless Direct Current Motor." Applied Mechanics and Materials 573 (June 2014): 102–7. http://dx.doi.org/10.4028/www.scientific.net/amm.573.102.

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Converter plays a vital role in modern transferable electronic devices and systems. In the battery operated transferable devices, the battery supplies an input voltage to the converter which in turn converts into the desired voltage. Buck-boost, Cuk, SEPIC and Zeta converter are meeting the operational requirements of DC-DC converters. The DC-DC converters are used in both buck function as well as boost function. But the advantage of Zeta converter is that, it does not suffer the polarity reversal problem. The aim of the proposed work is to design a Zeta converter which can be used to drive the Permanent Magnet Brushless Direct Current Motor. The proposed Zeta converter is suggested to control the speed of the Permanent Magnet Brushless Direct Current Motor, according to the generated switching sequence. The proposed work is generally used for low power applications and occasionally used for medium power applications.
5

Upendar, Jalla, Sangem Ravi Kumar, Sapavath Sreenu, and Bogimi Sirisha. "Implementation and study of fuzzy based KY boost converter for electric vehicle charging." International Journal of Applied Power Engineering (IJAPE) 11, no. 1 (March 1, 2022): 98. http://dx.doi.org/10.11591/ijape.v11.i1.pp98-108.

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Elecetric vehicle batteries require direct current (DC) current for charging; hence the circuit alternating current (AC) is converted to DC by a battery charger. Battery charger mostly consists of a rectifier and DC-DC converter with a controller built in to serve as a protective circuit. A harmonic source load is a type of electric car charger. During the AC-DC change over method, harmonic current is introduced into the power system, affecting power quality. In this study, a charging station consisting of buck boost and a charging station consisting a KY Boost converter were simulated. To maintain output voltage of DC-DC converters constant controller is used, the controller is either PI or fuzzy logic controller. So, four models are developed and simulated which are buck-boost converter controlled by proportional-integral (PI)-controller, KY-boost converter controlled by proportional integral-controller, buck boost converter controller fuzzy logic controller and KY boost-converter controlled by fuzzy logic controller. The total harmonic distortion (THD) of the four models is compared.
6

Sutikno, Tole, Ahmad Saudi Samosir, Rizky Ajie Aprilianto, Hendril Satrian Purnama, Watra Arsadiando, and Sanjeevikumar Padmanaban. "Advanced DC–DC converter topologies for solar energy harvesting applications: a review." Clean Energy 7, no. 3 (May 6, 2023): 555–70. http://dx.doi.org/10.1093/ce/zkad003.

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Abstract In this study, the advanced topologies of a DC–DC converter for applications involving the harvesting of solar energy are discussed. This work’s primary contribution is a guide for choosing the most effective topology for a DC–DC converter when developing solar energy collection systems. Several topologies of a DC–DC converter for solar energy harvesting applications are compared in terms of the range of power levels they can oversee, the complexity of the underlying hardware, the cost of implementation, the tracking efficiency and the overall efficiency of the converter. This article explains five innovative approaches for adapting boost converters to function as standard DC–DC converters to capture solar energy, consisting of (i) voltage-multiplier cell, (2) coupled inductor, (3) coupled inductor and switch capacitor, (4) cascaded topology and (5) voltage-lift technique. Because of the boost converter’s restrictions, it is necessary to deliver high performance. The comparison findings demonstrate that the voltage-lift-based boost-converter topology performs more effectively than the alternatives. In conclusion, the information presented in this paper can be utilized when developing solar energy collection systems to determine the sort of direct current to direct current converter that will be most effective.
7

Erat, Abdurrahim, and Ahmet Mete Vural. "DC/DC Modular Multilevel Converters for HVDC Interconnection: A Comprehensive Review." International Transactions on Electrical Energy Systems 2022 (September 8, 2022): 1–49. http://dx.doi.org/10.1155/2022/2687243.

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High voltage direct current (HVDC) technology is a key component in power systems owing to huge benefits such as long-distance power transmission, lower losses, asynchronous grid interconnections, controllability, system availability, and limited short-circuit currents. HVDC transmission is a cost-effective method of transporting huge amounts of power across long distances with little loss. It can also link asynchronous alternative current (AC) networks while balancing the grid. DC/DC converters are one of the most important components for HVDC power transmission, and DC/DC modular multilevel converters (MMCs) are the backbone of HVDC grid interconnections. The DC/DC MMC is a highly regarded converter architecture for medium/high-voltage DC grid interconnection. DC/DC MMC topologies play a key role in modern HVDC networks with varying voltage levels. This paper’s fundamental aim is to offer a recent comprehensive review of HVDC topologies, current DC/DC modular multilevel converter (MMC) topologies for HVDC interconnection, and DC/DC MMC control techniques.
8

J.S., Nancy Mary, Inba Rexy A., and Yuvarani K. "KY Converter Fed Dc Motor For Low Power Application." E3S Web of Conferences 430 (2023): 01273. http://dx.doi.org/10.1051/e3sconf/202343001273.

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This paper aims to design and to simulate a various DC-DC Converter with closed loop control. DC-DC converter is electronic co converter converts direct current source from one voltage to the level voltage. It is a type of electric power converter. The range of power vary from very low to very high. MATLAB Simulink has been used in modelling and simulation of the circuits. We have analysed the closed loop control of various DC-DC converters like buck, boost, buck-boost and KY converters using MATLAB Simulink. The KY converter is chose for the low power application and the same was designed and simulated.
9

R, Mr Bharath. "Design of Buck DC-DC Converter Space Application." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 1790–94. http://dx.doi.org/10.22214/ijraset.2022.45543.

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Abstract: The buck converter is a power electronic device which converts the higher level of input voltage to lower level of output voltage. For space applications, several tests were performed on direct current (DC) to (DC) converters to evaluate potential performance and reliability issues in space use of DC to DC converters and to determine if the use of electromagnetic interference (EMI) filters mitigates concerns observed during tests. Test findings reported here include those done up until January–June 2022. Tests performed include efficiency, regulation, load regulation, power consumption with inhibit on, load transient response, synchronization, and turn-on tests. Some of the test results presented here span the thermal range -20°C to 55°C. Lower range was extended to -40°C in some tested converters.
10

Alsokhiry, Fahad, and Grain Philip Adam. "Multi-Port DC-DC and DC-AC Converters for Large-Scale Integration of Renewable Power Generation." Sustainability 12, no. 20 (October 13, 2020): 8440. http://dx.doi.org/10.3390/su12208440.

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Numerous research studies on high capacity DC-DC converters have been put forward in recent years, targeting multi-terminal medium-voltage direct current (MVDC) and high-voltage direct current (HVDC) systems, in which renewable power plants can be integrated at both medium-voltage (MV) and high-voltage (HV) DC and AC terminals; hence, leading to complex hybrid AC-DC systems. Multi-port converters (MPCs) offer the means to promote and accelerate renewable energy and smart grids applications due to their increased control flexibilities. In this paper, a family of MPCs is proposed in order to act as a hybrid hub at critical nodes of complex multi-terminal MVDC and HVDC grids. The proposed MPCs provide several controllable DC voltages from constant or variable DC or AC voltage sources. The theoretical analysis and operation scenarios of the proposed MPC are discussed and validated with the aid of MATLAB-SIMULINK simulations, and further corroborated using experimental results from scale down prototype. Theoretical analysis and discussions, quantitative simulations, and experimental results show that the MPCs offer high degree of control flexibilities during normal operation, including the capacity to reroute active or DC power flow between any arbitrary AC and DC terminals, and through a particular sub-converter with sufficient precision. Critical discussions of the experimental results conclude that the DC fault responses of the MPCs vary with the topology of the converter adopted in the sub-converters. It has been established that a DC fault at high-voltage DC terminal exposes sub-converters 1 and 2 to extremely high currents; therefore, converters with DC fault current control capability are required to decouple the healthy sub-converters from the faulted one and their respective fault dynamics. On the other hand, a DC fault at the low-voltage DC terminal exposes the healthy upper sub-converter to excessive voltage stresses; therefore, sub-converters with bipolar cells, which possess the capacity for controlled operation with variable and reduced DC voltage over wide range are required. In both fault causes, continued operation without interruption to power flow during DC fault is not possible due to excessive over-current or over-voltage during fault period; however, it is possible to minimize the interruption. The above findings and contributions of this work have been further elaborated in the conclusions.
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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Direct Current Converter (DC/DC)":

1

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 medium and high voltage applications. The modular design facilitates scalability in terms of manufacturing and installation, and permits the generation of an output voltage with controllable dv/dt. The modular design is realized by connecting an auxiliary soft voltage clamping circuit across each semiconductor switch (for instance insulated gate bipolar transistor – IGBT) of the series switch arrays in the conventional two-level DAB design. With auxiliary active circuits, series connected IGBTs effectively become series connection of half-bridge submodules (cells) in each arm, resembling the modular multilevel converter (MMC) structure. For each half-bridge cell, capacitance for quasi-square wave (quasi two- level) operation is significantly smaller than typical capacitance used in MMCs. Also, no bulky arm inductors are needed. Consequently, the footprint, volume, weight and cost of cells are lower. Four switching sequences are proposed and analysed in terms of switching losses and operation aspects. A design method to size converter components is proposed and validated. Soft-switching characteristics of the analysed DAB are found comparable to the case of a two-level DAB at the same ratings and conditions. A family of designs derived from the proposed DAB design are studied in depth. Depending on the individual structure, they may offer further advantages in term of installed semiconductor power, energy storage, conduction losses, or footprint. A non-isolated dc-dc converter topology which offers more compact and efficient station design with respect to isolated DAB – yet without galvanic isolation – is studied for quasi two-level (trapezoidal) operation and compared to the isolated versions. In all the proposed isolated designs, active control of the dc-dc converter facilitates dc voltage regulation and near instant isolation of pole-to-pole and pole-to-ground dc faults within its protection zone. The same can be achieved for the considered non-isolated dc-dc converter topology with additional installed semiconductors. Simulation and experimental results are presented to substantiate the proposed concepts.
2

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 topologies, which may be used for a range of HVDC applications. Simple interconnections of new and legacy HVDC links is unlikely to require a large voltage-step, but will be required to transfer a large amount of power. As the HVDC network develops it may become feasible for wind-farms and load-centres to directly connect to the DC network, rather than requiring new and dedicated links. Such a connection is called an HVDC tap and is typically rated at only a small fraction of the link's peak capacity (around 10\%). Such taps would connect a distribution voltage level to the HVDC network. DC/DC converters suitable for large-step ratios (>5:1) may find their application here. In this work DC/DC converters for both small and large step-ratios are investigated. Two approaches are taken to design such converters: first, an approach utilising existing converter topologies is investigated. As each project comes with a huge price-tag, their reliability is paramount. Naturally, technology that has already proven itself in the field can be modified more readily and quickly for deployment. Using two modular multilevel converters in a front-to-front arrangement has been found to work efficiently for large power transfers and low step-ratios. Such a system can be operated at higher than 50 Hz frequencies to reduce the volume of a number of passive components, making the set-up suitable for compact off-shore applications. This does however incur a significant penalty in losses reducing the overall converter efficiency. In the second approach DC/DC converter designs are presented, that are more experimental and would require significantly more development work before deployment. Such designs do not look to adapt existing converter topologies but rather are designed from scratch, purely for DC/DC applications. An evolution of the front-to-front arrangement is investigated in further detail. This circuit utilises medium frequency (>50 Hz) square current and voltage waveforms. The DC/DC step-ratio is achieved through a combination of the stacks of cells and a transformer. This split approach allows for high-step ratios to be achieved at similar system efficiencies as for the front-to-front arrangement. The topology has been found to be much more suitable for higher than 50 Hz operation from a losses perspective, allowing for a compact and efficient design.
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 Prédictive (MPC) assure la planification de la tension et de la puissance à leur état d'équilibre, pour l'ensemble du système; enfin, le contrôleur de niveau supérieur, qui est principalement basé sur les techniques d'optimisation, où les aspects économiques sont pris en compte (il s’agit du réglage dit tertiaire).Au niveau des convertisseurs, un accent particulier est mis sur les convertisseurs bidirectionnels DC/DC. Dans cette thèse, trois topologies différentes sont étudiées en profondeur: deux phases Dual Active Bridge (DAB), trois phases DAB, et l’utilisation de la technologie Modular Multilevel converter (MMC) comme convertisseur DC/DC. Pour chaque topologie, une commande non-linéaire spécifique est discutée. D’autre part une nouvelle fonction pour le convertisseur DC/DC est étudiée. Il s’agit de son utilisation comme disjoncteur à courant continu (DC-CB). En ce qui concerne le contrôle primaire, qui permet de maintenir le niveau de tension continue dans le réseau, nous avons étudié trois philosophies de contrôle: celle de maître/esclave, celui du contrôle « voltage margin control » et celle de la commande du statisme (droop control). Enfin, nous avons choisi d'utiliser le droop control, entre autres, parce que la communication entre les nœuds n’est pas nécessaire. Concernant la commande secondaire, son principal objectif est de planifier le transfert de puissance entre les nœuds du réseau, qui fournissent la tension et la puissance de référence aux contrôleurs locaux et primaires, même lorsque des perturbations apparaissent. Dans cette partie, nous avons proposé une nouvelle approche pour résoudre les problèmes de flux de puissance (équations non-linéaires) basée sur le théorème du point fixe de l’application contractive. Ceci permet d'utiliser plus d'un slack bus, contrairement à l’approche classique basée sur la méthode de Newton-Raphson. Par ailleurs, le réglage secondaire joue un rôle très important dans les applications pratiques, en particulier lorsque les sources d'énergie renouvelables (variables dans le temps). Dans de tels cas, il est intéressant de considérer des dispositifs de stockage afin d'améliorer la stabilité de tout le système. Il est également possible d'envisager différents types de prévisions (météo, charge, ..) basées sur la gestion des réserves de stockage. Toutes ces caractéristiques ont suggéré l'utilisation d'une approche MPC. Dans ce contexte, plusieurs critères d'optimisation ont été considérés, en particulier la minimisation des pertes de transmission ou des congestions dans le réseau.La tâche principale de réglage tertiaire est de d'atteindre l'optimisation économique de l'ensemble du réseau. Dans cette thèse, nous avons pu maximiser le profit économique du système en agissant sur le marché réel, et en optimisant l'utilisation des périphériques de stockage. Dans le but de mettre en œuvre la philosophie de contrôle hiérarchique présentée dans cette thèse, nous avons construit un banc d'essai expérimental. Cette plate-forme dispose de quatre terminaux reliés entre eux par l'intermédiaire d'un réseau à courant continu, et connectés au réseau principal de courant alternatif. Ce réseau DC peut fonctionner à un maximum de 400 V, et avec une courant maximal de 15 A
This thesis focuses on the hierarchical control for a multi-terminal high voltage direct current (MT-HVDC) grid suitable for the integration of large scale renewable energy sources. The proposed control scheme is composed of 4 layers, from the low local control at the power converters in the time scale of units of ms; through distributed droop control (primary control) applied in several terminals in the scale of unit of seconds; and then to communication based Model Predictive Control (MPC) that assures the load flow and the steady state voltage/power plan for the whole system, manage large scale storage and include weather forecast (secondary control); finally reaching the higher level controller that is mostly based on optimization techniques, where economic aspects are considered in the same time as longer timespan weather forecast (tertiary control).Concerning the converters' level, special emphasis is placed on DC/DC bidirectional converters. In this thesis, three different topologies are studied in depth: two phases dual active bridge (DAB), the three phases DAB, and the use of the Modular Multilevel Converter (MMC) technology as DC/DC converter. For each topology a specific non-linear control is presented and discussed. In addition, the DC/DC converter can provide other important services as its use as a direct current circuit breaker (DC-CB). Several operation strategies are studied for these topologies used as DC-CB.With respect to primary control, which is the responsible to maintain the DC voltage control of the grid, we have studied several control philosophies: master/slave, voltage margin control and droop control. Finally we have chosen to use droop control, among other reasons, because the communication between nodes is not required. Relative to the secondary control, its main goal is to schedule power transfer between the network nodes providing voltage and power references to local and primary controllers, providing steady state response to disturbances and managing power reserves. In this part we have proposed a new approach to solve the power flow problem (non-linear equations) based on the contraction mapping theorem, which gives the possibility to use more than one bus for the power balance (slack bus) instead of the classic approach based on the Newton-Raphson method. Secondary control plays a very important role in practical applications, in particular when including time varying power sources, as renewable ones. In such cases, it is interesting to consider storage devices in order to improve the stability and the efficiency of the whole system. Due to the sample time of secondary control is on the order of minutes, it is also possible to consider different kinds of forecast (weather, load,..) and to achieve additional control objectives, based on managing storage reserves. All these characteristics encourage the use of a model predictive control (MPC) approach to design this task. In this context, several possibilities of optimization objective were considered, like to minimize transmission losses or to avoid power network congestions.The main task of tertiary control is to manage the load flow of the whole HVDC grid in order to achieve economical optimization. This control level provides power references to the secondary controller. In this thesis we were able to maximize the economic profit of the system by acting on the spot market, and by optimizing the use of storage devices. In this level it is again used the MPC approach.With the aim of implementing the hierarchical control philosophy explained in this thesis, we have built an experimental test bench. This platform has 4 terminals interconnected via a DC grid, and connected to the main AC grid through VSC power converters. This DC grid can work at a maximum of 400 V, and with a maximum allowed current of 15 A
4

Toussaint, Pierre. "De la quasi-resonance introduite dans les convertisseurs, DC-DC de moyenne puissance : application à l'absorption sinusoïdale." Cachan, Ecole normale supérieure, 1994. http://www.theses.fr/1994DENS0013.

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Électronique de commutation pour l'essentiel, l'électronique de puissance met en œuvre des structures de convertisseurs ou la gestion des pertes par commutation pose problème. La commutation commandée lorsqu'elle est associée à des techniques d'aide a la commutation des interrupteurs, donne de bons résultats. Dans la gamme de puissance allant jusqu'a la dizaine de kilowatts, il existe une alternative à cette solution, que l'on désigne par le terme de quasi-résonance. L'étude présentée montre comment l'introduction de la commutation douce au sein de convertisseurs classiques permet d'obtenir d'aussi bonnes performances voire même meilleures, tout en simplifiant quelque peu la topologie des structures. Sa facilite de mise en œuvre est mise en évidence. La problématique du choix des interrupteurs est abordée. Un second problème pose par l'emploi de l'électronique de puissance et par la multiplication de convertisseurs, est la pollution du réseau auquel ils sont connectes. Afin de résorber cette pollution, des convertisseurs dits à absorption sinusoïdale (c. A. S. ) font l'objet d'études en tout points du globe. Une étude bibliographique leur est consacrée et une réalisation propre au laboratoire est détaillée. Ces convertisseurs fonctionnent en commutation commandée, aussi nous sommes nous attaches à développer des structures réalisant cette fonction de c. A. S. Tout en introduisant les techniques de commutation douce. Deux structures de flyback quasi-résonants, de 500 et 1300 w sont étudiées. Chacune consomme un courant sinusoïdal présentant un taux de distorsion inferieur à 10%. Une ébauche de modélisation de l'un de ces convertisseurs est également décrite
5

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 focalise sur trois topologies : Modular Multilevel Converter (MMC), Alternate Arm Converter (AAC) et Series Bridge Converter (SBC). Elles sont présentées, dimensionnées et analysées en détail, puis comparées de façon quantitative en utilisant des indicateurs de performance originaux. Il en ressort que le MMC et le SBC sont particulièrement intéressants. La méthode de commande conventionnelle du MMC est ensuite présentée et ses propriétés structurelles sont mises en évidence. Une première loi de commande originale est présentée, avec des performances similaires mais une complexité inférieure à l'état de l'art. La seconde est non linéaire, basée sur la théorie de la platitude différentielle, et permet un suivi de puissance très rapide tout en assurant la stabilité exponentielle globale du système. Ces lois de commande sont évaluées en simulation, avec un modèle moyen et un modèle détaillé intégrant 180 sous-modules par bras. La dernière partie concerne le SBC. Après l'avoir modélisé, des résultats concernant une analyse structurelle de la topologie sont présentés ainsi qu'une loi de commande originale. Le rôle fondamental du transformateur pour les convertisseurs à structure série comme le SBC est souligné. Enfin, les performances de la loi de commande proposée sont testées en simulation
As Alternating Current (AC) is well suited for most of the production, transmission, and distribution applications, its massive use is easy to understand. However, for over a century, the benefits of High Voltage Direct Current (HVDC) for long-distance energy transmission are well known. To connect both, AC/DC converters are mandatory, whose nature evolves with technological progress. After the problematic induced by HVDC on AC/DC converters is presented, this manuscript is focused on three topologies: Modular Multilevel Converter (MMC), Alternate Arm Converter (AAC) and Series Bridge Converter (SBC). They are presented, sized, analyzed thoroughly, and compared in quantitative terms, using original key performance indicators. It appears that MMC and SBC are particularly promising. The conventional control method of the MMC is then presented, and its structural properties are highlighted. A first original control law is presented, with similar performances but less complexity than the state-of-the-art. A second control law, non-linear and based on differential flatness theory, is introduced. It allows a very fast power tracking response while ensuring the global exponential stability of the system. These control laws are tested in simulation, using an average model and a detailed model with 180 sub-modules per arm. The last part is dedicated to the SBC. After a modeling step, some results regarding its structural analysis are presented, and an original control law is introduced. The essential role of the transformer for series converters like the SBC is highlighted. Finally, the performance of the proposed control law is assessed in simulation
6

Yang, Gang. "Design of a High Efficiency High Power Density DC/DC Converter for Low Voltage Power Supply in Electric and Hybrid Vehicles." Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0011/document.

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Cette thèse traite de la conception d’un convertisseur DC / DC destiné aux véhicules électriques et hybrides (2,5 kW, 400V/14V, 250kHz). Dérivé de la topologie LLC à résonance, ce convertisseur bénéficie des nombreux avantages propres à cette structure particulière. C’est ainsi que le prototype réalisé présente un rendement très élevé, une densité de puissance très forte avec des perturbations EMI très réduites. La première partie de cette thèse est consacrée à l’analyse théorique du circuit LLC afin de dégager un modèle de conversion et une stratégie de contrôle adaptée à l’application visée. Afin de conserver un rendement important sur une large plage de charge, une structure basée sur la mise en parallèle de deux modules LLC est proposée. Une nouvelle stratégie de contrôle à deux boucles est également proposée pour équilibrer le courant entre les deux modules. La seconde partie de la thèse fait appel à la simulation et à l’expérimentation. Il s’agit de minimiser la masse et l’encombrement tout en maximisant le rendement. Un composant magnétique spécial est conçu puis dimensionné pour intégrer le transformateur et diverses inductances de résonance. Ce convertisseur met également en œuvre un système de redressement synchrone robuste avec une compensation de phase, un module de puissance avec une résistance thermique très faible et un système de refroidissement efficace par air. Le rendement maximal mesuré est 95%. Le rendement demeure supérieur à 94% sur une plage de puissance s’étalant de 500 W à 2 kW. La densité de puissance est 1W/cm3. La CEM du convertisseur est développée dans cette thèse
In this dissertation, a 2.5kW 400V/14V, 250kHz DC/DC converter prototype is developed targeted for electric vehicle/hybrid vehicle applications. Benefiting from numerous advantages brought by LLC resonant topology, this converter is able to perform high efficiency, high power density and low EMI. A first part of this dissertation is the theoretical analysis of LLC: topology analysis, electrical parameter calculation and control strategy. To arrange high output current, this thesis proposes parallel connected LLC structure with developed novel double loop control to realize an equal current distribution. The second part concerns on the system amelioration and efficiency improvement of developed LLC. A special transformer is dimensioned to integrate all magnetic components, and various types of power losses are quantified based on different realization modes and winding geometries to improve its efficiency. This converter also implements a robust synchronous rectification system with phase compensation, a power semiconductor module, and an air-cooling system. The power conversion performance of this prototype is presented and the developed prototype has a peak efficiency of 95% and efficiency is higher than 94% from 500W to 2kW, with a power density of 1W/cm3. The CEM analysis of this converter is also developed in this thesis
7

Verdicchio, Andrea. "Nouvelle électrification en courant continu moyenne tension pour réseau ferroviaire." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0093.

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Depuis le début du 20ème siècle, différents systèmes d’électrification ferroviaire en courantcontinu et en courant alternatif ont été développés en Europe. Les systèmes en courant alternatifmonophasé moyenne tension (25 kV-50 Hz ou 15 kV 16,7 Hz) permettent d’utiliser une caténairelégère de faible section de cuivre mais de par leur principe mettent en jeu de la puissancefluctuante et de la puissance réactive qu’il faut compenser par des dispositifs volumineux etcoûteux. Les systèmes d’électrification à courant continu (1,5kV ou 3kV) ne possèdent pas cesinconvénients mais en contrepartie, leur relativement faible niveau de tension implique lacirculation de courants élevés dans la caténaire ce qui s’oppose à toute augmentation de trafic carla section de cuivre ne peut pas être augmentée au-delà de 1000 mm2. Du point de vue dumatériel roulant, les locomotives alimentées en courant alternatif ont une chaine de conversiond’énergie électrique complexe et volumineuse (transformateur abaisseur, redresseur, filtre bassefréquence puis onduleur). En revanche, une chaine de conversion fonctionnant sous caténaire àcourant continu se réduit à un filtre d'entrée et à un onduleur de traction. Aujourd’hui, les progrèstechnologiques réalisés dans le domaine de l'électronique de puissance permettent d’envisager ledéveloppement de réseaux électriques à courant continu moyenne tension pour accompagner latransition énergétique en intégrant plus facilement des sources d’énergies renouvelables et deséléments de stockage d’énergie. Partant de ce constat, l’objectif de ce travail de thèse est deproposer un nouveau système d’électrification ferroviaire à courant continu moyenne tension,d’une part, dans le but de combiner les avantages des systèmes actuels d’électrification et d’autrepart, d’envisager à moyen terme la rénovation des lignes électrifiées à courant continu. Le premierchapitre de cette thèse présente un état de l’art des systèmes d’électrification ferroviaire existantset des chaines de traction associés. Le deuxième chapitre met en évidence l’intérêt d’uneélectrification à courant continu moyenne tension pour la traction ferroviaire. Une méthode decalcul, permettant de déterminer le niveau de tension continue pour un trafic donné, est proposée.Il est ainsi montré que le choix d’un niveau de tension à 9 kV permet d’obtenir des sections decaténaire et un espacement des sous-stations comparables au système 25kV-50 Hz. Dans sapremière partie, le troisième chapitre propose une stratégie permettant de faire évoluer le systèmed’électrification 1,5 kV existant en France vers un système 9 kV. En attendant que le parc d’enginsde traction soit adapté pour fonctionner sous une caténaire à 9 kV, il est possible de préparerl’évolution du système d’électrification en déployant une ligne de transport d’énergie électrique en9 kV (feeder) en parallèle de la caténaire 1,5 kV existante. Au terme de la période de transition, leniveau de tension 1,5 kV est complètement supprimé et la totalité de l’infrastructure ainsi que lesengins de traction fonctionnent alors sous 9 kV. La deuxième partie de ce chapitre est consacréeà l’étude d’une topologie associant des convertisseurs DC/DC isolés et permettant de remplir lafonction de transformateur électronique indispensable pour le renforcement de l’alimentation de lacaténaire 1,5 kV à partir du feeder 9 kV.Le quatrième chapitre présente la réalisation et les essaisd’un convertisseur DC/DC isolé d’une puissance de 300 kW utilisant des modules MOSFET SiC3,3 kV. Une conclusion générale et des perspectives concluent ce mémoire
Since the beginning of the 20th century, various DC and AC rail electrification systems have beendeveloped in Europe. Single-phase, medium-voltage AC systems (25 kV-50 Hz or 15 kV 16.7 Hz)allow the use of a light overhead-line of small copper cross-section but by their principle involvefluctuating power and reactive power that have to be compensated by large and expensivedevices. DC electrification systems (1.5kV or 3kV) do not have these disadvantages but in return,their relatively low voltage level involves the circulation of high currents in the overhead-line whichlimits any increase in traffic because the copper section cannot be increased beyond 1000 mm2.From a rolling stock point of view, AC powered locomotives have a complex and voluminousconversion chain (step-down transformer, rectifier, low-frequency filter and traction inverter). Onthe other hand, a conversion chain operating under direct current catenary is reduced to an inputfilter and a traction inverter. Today, the technological progress made in the field of powerelectronics makes it possible to envisage the development of medium voltage DC grids to supportthe energy transition by integrating more easily renewable energy sources and storage devices.On the basis of this observation, the aim of this thesis is to propose a new medium voltage DCrailway electrification system, on the one hand, with the aim of combining the advantages of thecurrent railway electrification systems and on the other hand, to consider in the medium term therenovation of lines electrified in DC. The first chapter of this thesis presents a state of the art ofexisting railway electrification systems and associated traction chains. The second chapterhighlights the interest of a medium voltage DC electrification for railway traction. A calculationmethod for determining the DC voltage level for a given traffic is proposed. Therefore, it is shownthat the choice of a voltage level at 9 kV makes it possible to obtain an overhead-line cross-section and a substation spacing comparable to the 25 kV-50 Hz system. In its first part, the thirdchapter proposes a strategy to upgrade the existing 1.5 kV French electrification system to a 9 kVsystem. Until the fleet of traction units is adapted to operate at 9 kV, it is possible to prepare theevolution of the electrification system by deploying a transmission line at 9 kV (feed-wire) inparallel with the existing 1.5 kV overhead-line. At the end of the transition period, the 1.5 kVvoltage level is completely removed and the entire infrastructure as well as the traction unitsoperate at 9 kV. The second part of this chapter is dedicated to the study of a topology, based onan association of isolated DC/DC converters, to fulfil the function of solid state transformer whichis essential for the power reinforcement of the 1.5 kV system from the 9 kV feed-wire. The fourthchapter presents the realization and tests of an isolated DC / DC converter with a power level of300 kW using 3.3 kV SiC MOSFET modules. A general conclusion and perspectives conclude thismanuscript
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Vidales, Luna Benjamin. "Architecture de convertisseur intégrant une détection de défauts d'arcs électriques appliquée au sources d'énergie continues d'origine photovoltaïques." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0040.

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Détection de défaut d'arcs intégrée dans un convertisseur intelligent contrôlé par FPGA pour les panneaux photovoltaïques. La mise au point de convertisseur intelligents intégrant des dispositifs de protection est une thématique que cherche à développer l'Institut Technologique de Morelia (Mexique) avec laquelle nous collaborons sur ce projet. L'objectif plus spécifique de ce travail repose sur la détection de défauts d'arc électrique en se basant sur le contrôle intelligent des onduleurs utilisés dans la gestion de l'énergie produite par des panneaux photovoltaïques. Depuis plusieurs années, le développement croissant des panneaux solaires photovoltaïques comme source d’énergie s’est imposé et la sécurité de ces dispositifs liée à la détection de défauts d’arcs électriques est devenu un enjeu majeur. L'approche que nous proposons dans ce travail est le développement d'une stratégie novatrice pour la surveillance et la prédiction de défaillance du réseau électrique constitué de panneaux solaires en présence de défauts d’arcs. Actuellement, la majorité des systèmes de détection comprennent des modules détecteurs disposés dans le circuit électrique à protéger dont la robustesse est loin d'être optimale. L'approche que nous proposons consiste à développer un dispositif de surveillance et de détection de défaut directement intégré dans l'onduleur intelligent. Le contrôle optimal de l'onduleur intelligent assurera une détection fiable de défaut d'arc sans déclenchement intempestif. Le dispositif comprendra également un système de coupure. La méthode de détection que nous privilégions sera basée sur l'analyse du courant et de la tension de ligne. Les algorithmes seront basés sur une analyse temps/fréquence des signatures courant et de tension suivie par une logique pertinente de décision de telle manière à minimiser le taux de fausses détections.Le noyau du convertisseur intelligent est constitué par un FPGA. Le parallélisme des traitements de données assurera le respect des contraintes temps réel. Dans le cadre du projet de thèse, la mise en œuvre, le test des algorithmes de détection et l’implémentation optimale afin de respecter les contraintes temps réel dans le FPGA sera mené dans le cadre d’une cotutelle de thèse entre l’institut technologique de Morelia et l’Université de Lorraine
In this research work, the development of a multilevel inverter for PV applications is presented. The PV inverter, has two stages one DC/DC converter and one DC/AC inverter, and is capable of generating an AC multilevel output of nine levels, it's a transformerless inverter and uses a reduced number of components compared to other topologies. The conception of a novel DC/DC converter is capable of generating two isolated DC voltage levels needed to feed the DC/AC stage. This DC/DC stage is developed in two variants, buck and boost, the _rst to perform the reduction of voltage when the DC bus is too high, and second to increase the voltage when the DC bus is too low to perform interconnection with the grid through the DC/AC inverter. This is achieved thanks to the parallel functioning of the developed topology, which make use of moderated duty cycles, that reduces the stress in the passive and switching components, reducing potential losses. The validation of the PV inverter is performed in simulation and experimental scenarios. In the other hand, the response of the inverter facing an arc fault in the DC bus is studied by performing a series of tests where the fault is generated in strategic points of the DC side, this is possible thanks to the design and construction of an arc fault generator based in the specifications of the UL1699B norm. During the tests is observed that with the apparition of an arc fault, there is a lost in the half-wave symmetry of the AC multilevel output voltage waveform, generating even harmonics which aren't present during normal operation, only when an arc fault is present in the DC system. The monitoring of even harmonics set the direction for developing the detection technique. Since the magnitude of even harmonics in the inverter is very low, the total even harmonic distortion is employed as a base for the detection technique presented in this thesis. The effectiveness of this method is verified with a series of tests performed with different loads
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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 links for advanced power oscillation damping provision. The rise of hybrid AC-DC power systems is therefore sought as a viable solution in overcoming this challenge and securing wide-area stability. If multiple FACTS devices and HVDC links are integrated in a scheme with no supervising control actions considered amongst them, the overall system response might not be optimal. Each device might attempt to individually damp power oscillations ignoring the control status of the rest. This introduces an increasing chance of destabilizing interactions taking place between them, leading to under-utilized performance, increased costs and system wide-area stability deterioration. This research investigates the development of a novel supervisory control scheme that optimally coordinates a parallel operation of multiple FACTS devices and an HVDC link distributed across a power system. The control system is based on Linear Quadratic Gaussian (LQG) modern optimal control theory. The proposed new control scheme provides coordinating control signals to WAMS based FACTS devices and HVDC link, to optimally and coherently counteract inter-area modes of low frequency power oscillations inherent in the system. The thesis makes a thorough review of the existing and well-established improved stability practises a power system benefits from through the implementation of a single FACTS device or HVDC link, and compares the case –and hence raises the issue–when all active components are integrated simultaneously and uncoordinatedly. System identification approaches are also in the core of this research, serving as means of reaching a linear state space model representative of the non-linear power system, which is a pre-requisite for LQG control design methodology.
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Mai, Yuan Yen. "Current-mode DC-DC buck converter with current-voltage feedforward control /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?ECED%202006%20MAI.

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Books on the topic "Direct Current Converter (DC/DC)":

1

Breussegem, Tom Van. CMOS Integrated Capacitive DC-DC Converters. New York, NY: Springer New York, 2013.

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Hanson, Ronald J. Implementing Closed-Loop Control Algorithms for DC-to-DC Converters and ARCP Inverters Using the Universal Controller. Ft. Belvoir: Defense Technical Information Center, 1997.

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Meeting, IEEE Power Engineering Society Summer. Panel session on operating experience of DC systems interacting with weak AC systems: The IEEE Power Engineering Society, 1991 Summer Meeting, July 31, 1991. Piscataway, NJ: Institute of Electrical and Electronics Engineers, 1991.

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National Joint Apprenticeship and Training Committee for the Electrical Industry., ed. DC theory. 2nd ed. Clifton Park, NY: Delmar Cengage Learning, 2008.

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Rosen, Stan. DC circuits. Casper, Wyo: IAP, Inc., 1992.

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Mitchell, Daniel M. DC-DC switching regulator analysis. New York: McGraw-Hill, 1988.

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Patrick, Dale R. Understanding DC circuits. Boston, Mass: Newnes, 2000.

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Klein, Stan. NJATC DC theory. 3rd ed. Upper Marlboro, MD: National Joint Apprenticeship and Training Committee, 2010.

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National Joint Apprenticeship and Training Committee for the Electrical Industry., ed. DC theory. Clifton Park, NY: Thomson/Delmar Learning, 2004.

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National Joint Apprenticeship and Training Committee for the Electrical Industry. NJATC DC theory textbook. 2nd ed. Upper Marlboro: National Joint Apprenticeship and Training Committe for the Electrical Industry, 2002.

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Book chapters on the topic "Direct Current Converter (DC/DC)":

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Sha, Deshang, and Guo Xu. "A ZVS Bidirectional Three-Level DC–DC Converter with Direct Current Slew Rate Control of Leakage Inductance Current." In High-Frequency Isolated Bidirectional Dual Active Bridge DC–DC Converters with Wide Voltage Gain, 199–222. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0259-6_9.

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Sauer, Alexander, Karl-Peter Simon, and Sebastian Weckmann. "Direct Current Returns." In The DC-Factory, 1–7. München: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9783446471795.001.

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Wu, Keng C. "Simulation of Flyback Converter with Current Mode Control." In Pulse Width Modulated DC-DC Converters, 208–16. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6021-0_14.

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Pointon, A. J., and H. M. Howarth. "Direct current theory." In AC and DC Network Theory, 6–13. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3142-1_2.

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Patrick, Dale R., Stephen W. Fardo, Ray E. Richardson, and Vigyan (Vigs) Chandra. "DC (Direct Current) Electrical Fundamentals." In DC/AC Electrical Fundamentals, 3–39. New York: River Publishers, 2024. http://dx.doi.org/10.1201/9781003377269-2.

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Agrawal, Shubham, L. Umanand, and B. Subba Reddy. "Bidirectional Current-Fed Converter for High Gain DC–DC and DC–AC Applications." In Lecture Notes in Electrical Engineering, 101–11. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1978-6_9.

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Chen, Yanfeng, and Bo Zhang. "Analysis of Current-Mode Controlled PWM DC/DC Converters Based on ESPM." In Equivalent-Small-Parameter Analysis of DC/DC Switched-Mode Converter, 131–58. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2574-8_7.

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Fernández, Efrén, and Diego Rojas. "Reduction of Ripple Current in DC-DC SiC Converter Using HIL System." In Innovation and Research, 209–21. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60467-7_18.

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Zhaoxia, Leng, Liu Qingfeng, Sun Jinkun, and Wang Huamin. "A Current Sharing Strategy of Paralleled DC-DC Converter Based on Efficiency." In Lecture Notes in Electrical Engineering, 453–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28744-2_59.

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Ruan, Xinbo, Li Zhang, Xinze Huang, Fei Liu, Guoping Zhu, and Shiqi Kan. "Second Harmonic Current Reduction for Two-Stage DC-AC Inverter with DCX-LLC Resonant Converter in the Front-End DC-DC Converter." In Second Harmonic Current Reduction Techniques for Single-Phase Power Electronics Converter Systems, 107–25. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1547-5_5.

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Conference papers on the topic "Direct Current Converter (DC/DC)":

1

Karamanakos, Petros, Tobias Geyer, and Stefanos Manias. "Direct model predictive current control of DC-DC boost converters." In 2012 EPE-ECCE Europe Congress. IEEE, 2012. http://dx.doi.org/10.1109/epepemc.2012.6397294.

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Gao, Xueping, Lijun Fu, Feng Ji, and You Wu. "Virtual Current Based Direct Power Control Strategy of Dual-active-bridge DC-DC Converter." In 2019 IEEE International Conference on Mechatronics and Automation (ICMA). IEEE, 2019. http://dx.doi.org/10.1109/icma.2019.8816534.

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Alfares, Abdulgafor, Ehsan Afshari, Mahshid Amirabadi, and Brad Lehman. "A modular SCR-based DC-DC converter for medium-voltage direct-current (MVDC) grid applications." In 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2017. http://dx.doi.org/10.1109/ecce.2017.8096870.

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Kumari, Sweety, and Ramesh Kumar. "Performance Analysis of Brushless Direct Current Motor Drive for Different types of DC-DC Converter Using MPPT." In 2020 International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET). IEEE, 2020. http://dx.doi.org/10.1109/icefeet49149.2020.9186977.

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Xu, Lingyu, Deshang Sha, and Hongyu Chen. "A ZVS bidirectional three-level DC-DC converter with direct current slew rate control of leakage inductance." In 2014 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2014. http://dx.doi.org/10.1109/ecce.2014.6953724.

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Erat, Abdurrahim, and Ahmet Mete Vural. "An Innovative DC-DC Modular Multilevel Converter Topology for Interconnection Asynchronous High Voltage Direct Current Power Grids." In 2023 14th International Conference on Electrical and Electronics Engineering (ELECO). IEEE, 2023. http://dx.doi.org/10.1109/eleco60389.2023.10416055.

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Iskhakov, Albert, Sergey Skovpen, Mark Ivlev, Mikhail Muzyka, Elena Limonnikova, and Sergey Platonenkov. "A High-Speed Current Regulator Based on a Buck DC-DC Converter Using a Direct Deadbeat Control." In 2023 IEEE 2nd Industrial Electronics Society Annual On-Line Conference (ONCON). IEEE, 2023. http://dx.doi.org/10.1109/oncon60463.2023.10430525.

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Rozan, Muhammad Izaaz, Mochammad Rusli, and Muhammad Aziz Muslim. "Control of Direct Current (DC) Output Voltage for Two Level DC/DC Boost Converter by Sliding Mode Controller in Application of Fuel Cell." In 2023 International Conference on Computer Science, Information Technology and Engineering (ICCoSITE). IEEE, 2023. http://dx.doi.org/10.1109/iccosite57641.2023.10127669.

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Liske, Andreas, Fabian Stamer, and Michael Braun. "Easy current slope detection for low cost implementation of the direct adaptive current control for DC-DC-converters." In 2015 IEEE Energy Conversion Congress and Exposition. IEEE, 2015. http://dx.doi.org/10.1109/ecce.2015.7309686.

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Sujapradeepa, M., A. Allwyn Clarence Asis, and S. EdwardRqjan. "Performance Evaluation of a Direct AC-DC Boost Converter for Piezo-Electric Energy Harvesting System." In 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT). IEEE, 2018. http://dx.doi.org/10.1109/icctct.2018.8550875.

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Reports on the topic "Direct Current Converter (DC/DC)":

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Jin, Lei. Modeling of DC Link Capacitor Current Ripple for Electric Vehicle Traction Converter. Portland State University Library, September 2013. http://dx.doi.org/10.15760/trec.40.

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Baete, Christophe. PR-405-173610-WEB Development of New Criteria for DC Stray Current Interference. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2019. http://dx.doi.org/10.55274/r0011610.

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Abstract:
Wednesday, September 4, 2019 PRESENTER: Christophe Baete, Elsyca HOST: Sylvain Fontaine, GTRgaz MODERATOR: Laurie Perry, PRCI CLICK BUY/DOWNLOAD TO ACCESS THE WEBINAR REGISTRATION LINK Join the PRCI Corrosion Technical Committee as they present research activities related to the development of a dynamic direct current (DC) stray current corrosion criteria by applying an advanced DC corrosion prediction model. Benefits of attending: - Learn the definition of a practical criterion to assess dynamic DC stray current influences - An understanding of evaluating and mitigating the dynamic DC stray currents affecting buried pipelines - How to optimize cathodic protection and other counter measures of the pipeline Who should attend? Pipeline corrosion and integrity personnel, engineers and management. Recommended pre-reading: PR-405-173610-R01 Development of New Criteria for DC Stray Current Interference
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Baete, Christophe. PR-405-173610-R01 Develop New Criteria for DC Stray Current Interference. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 2019. http://dx.doi.org/10.55274/r0011602.

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Abstract:
This report refers to the activities performed in the frame of PRCI project on the refinement of the dynamic DC stray current corrosion criteria by applying an advanced DC corrosion prediction model. In order to find realistic stray current interference conditions, an industry survey was performed to retrieve dynamic DC interference signals on real-world pipelines. After analysis of the cases, a simulation matrix was proposed that covers a wide variety of interference conditions. The simulated signals were simplified as squared pulses. The European Standard EN 50162 Protection against corrosion stray current from direct current systems was used a reference for validation. Some other criteria that are currently under investigation have been considered as well. The criteria were validated against simulated corrosion rates. The final goal is achieving a further refinement of the dynamic DC stray current criteria. The simulations demonstrate that current criteria are either not valid, either too conservative when steel tends to passivate under anodic excursions in high pH soil due to the development of a Fe3O4 film. The lowest pH value at which the passive film developed was 10.34 with relatively short cathodic duration (30 sec) and long (50 sec) and strong (-200 mVcse) anodic potential. There is a related webinar.
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Johnson, Karl, Vagelis Vossos, Margarita Kloss, Gerald Robinson, and Rich Brown. Direct Current as an Integrating Platform for ZNE Buildings with EVs and Storage: DC Direct Systems – A Bridge to a Low Carbon Future? Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1408478.

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Wagner, Daniel, Jim Walton, and Kurt Lawson. PR-620-173603-R01 Process for Precise Location, Measurement, and Evaluation of DC Stray Currents. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2019. http://dx.doi.org/10.55274/r0011580.

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Techniques employed by pipeline operators for locating static or dynamic stray current vary widely across the industry. PRCI has requested development of a process that operators can apply consistently to locate, validate, test and provide engineering analysis for the impact of Direct Current (DC) stray electrical current on pipelines. The purpose of this project is to research and quantify the leading practices used in industry for precise location, measurement and evaluation of stray currents affecting transmission pipelines.

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