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Dissertations / Theses on the topic 'DC microgrids'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

Blasi, Bronson Richard. "DC microgrids: review and applications." Kansas State University, 2013. http://hdl.handle.net/2097/16823.

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Master of Science<br>Department of Architectural Engineering and Construction Science<br>Fred Hasler<br>This paper discusses a brief history of electricity, specifically alternating current (AC) and direct current (DC), and how the current standard of AC distribution has been reached. DC power was first produced in 1800, but the shift to AC occurred in the 1880’s with the advent of the transformer. Because the decisions for distribution were made over 100 years ago, it could be time to rethink the standards of power distribution. Compared to traditional AC distribution, DC microgrids are sig
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2

Ting, Sean. "Protection in Low Voltage DC Microgrids." Thesis, Ting, Sean (2017) Protection in Low Voltage DC Microgrids. Honours thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/38695/.

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Protection is an important aspect when designing a microgrid system, as it ensures the network is able to run safely. As the debate between AC vs. DC protection schemes continue, there appear to be distinct advantages and disadvantages on each side with respect to reliability, efficiency, security, environmental and economic concerns. In this thesis, a low voltage DC microgrid protection scheme used in a data center is proposed. The final goal of this project is to develop a network and perform a fault analysis study while investigating different aspects of power protection schemes. Research i
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3

Benahmed, Sif Eddine. "Distributed Cooperative Control for DC Microgrids." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0056.

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Au cours des dernières années, le réseau électrique connait une transformation rapide avec la pénétration massive des unités de production renouvelables et distribuées. Le concept de microgrids (micro-réseau électrique) est un élément clés de cette transition énergétique. Ces micro-réseaux sont constitués par un ensemble de plusieurs unités de production distribuées (DGUs), d'unités de stockage (SUs) et de charges interconnectées par des lignes électriques. Un microgrid peut être installé dans plusieurs endroits, par exemple dans des maisons, des hôpitaux, des quartiers, etc. et fonctionne soi
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4

Liu, Jianzhe. "On Control and Optimization of DC Microgrids." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512049527948171.

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5

Vijayaragavan, Krishna Prasad. "Feasibility of DC microgrids for rural electrification." Thesis, Högskolan Dalarna, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:du-25850.

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DC system and DC microgrids are gaining popularity in recent times. This thesis suggests a method to state the workability of a DC based PV system using the softwares Simulink, PVsyst and HOMER. The aims of this project include suggesting a DC based architecture, finding out the performance ratio and a cost analysis. The advantages of the DC based system, the cost benefits associated with it and its performance will determine its feasibility.   Not many softwares have the functionality to simulate DC based PV systems. PVsyst is considered as one of the most sought-out softwares for the simulat
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6

Benamane, Siad Sabah. "DC Microgrids Control for renewable energies integration." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLE006.

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La forte proportion des sources d'énergie intermittentes présente de nouveaux défis pour la stabilité et la fiabilité des réseaux électriques. Dans ce travail nous considérons la connexion de ces sources avec et un système de stockage hybride via un MicroGrid à courant continu (DC) afin de satisfaire les contraintes de connexion au réseau (les Grid-Codes). L'objectif principal ici est de concevoir un système pouvant répondre à ces exigences et nous permettant d'obtenir un comportement Plug and Play; cette approche est basée sur la "philosophie System of Systems ". utilisant des méthodologies d
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7

Cavanagh, Kathleen Alison. "Stability-constrained design for low voltage DC microgrids." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120235.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 91-93).<br>Microgrids are a promising solution to reducing the energy access gap. However, microgrids are inherently fragile systems as they are not globally stable. This thesis considers two voltage instabilities that can arise in DC microgrids as a result of tightly controlled loads in the presence of inductive delays. First, we examine the instability that arises when a constant power load is added to or remov
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8

Bianchi, Marco Andrés. "Improving dynamic performance in dc microgrids using trajectory control." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/64145.

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Direct-current (dc) microgrids interconnect dc loads, distributed renewable energy sources, and energy storage elements within networks that can operate independently from the main grid. Due to their high efficiency, increasing technological viability and resilience to natural disturbances, they are set to gain popularity. When load-side converters in a microgrid tightly regulate their output voltages, they are seen as constant power loads (CPLs) from the standpoint of the source-end converters. CPLs can cause instability within the network, including large voltage drops or oscillations in the
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9

Salomonsson, Daniel. "Modeling, Control and Protection of Low-Voltage DC Microgrids." Doctoral thesis, Stockholm : Elektriska energisystem, Electric Power Systems, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4666.

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10

Liu, Guangyuan. "Advanced Controllers of Power Electronic Converters in DC Microgrids." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422330.

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To cope with the pressure of climate change and depletion of fossil fuels, distributed power generation based on sustainable and green resources, such as photovoltaic and wind, have been exploited over the past decades. High penetration of renewable energy sources challenges the normal operation of traditional power grids, due to their characteristics of intermittence and uncertainty. To address this issue, an effective way is to aggregate distributed generators, energy storage systems, and customer loads together, as a single entity, that is, the so-called microgrids. Every microgrid is a ful
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11

ABEDINI, Hossein. "High-bandwidth droop-based controllers for DC and AC microgrids." Doctoral thesis, Università degli studi di Padova, 2022. https://hdl.handle.net/11577/3467170.

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Due to the reduction in the transmission and distribution losses, the overall system costs and the CO2 emissions, distributed power generation based on sustainable and green resources, such as photovoltaic and wind have been exploited over the past decades. Grouping several mentioned power resources together with some loads as well as some energy storage systems is so-called a microgrid environment. Also, in microgrids, as the sources are near the loads, the power quality, efficiency, and reliability will be significantly increased. Microgrids are also a smart choice for remote locations that
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12

Boutros, Fouad. "Nouvelles approches d'optimisation multi-objectifs pour les Microgrids DC Autonomes." Electronic Thesis or Diss., Nantes Université, 2025. http://www.theses.fr/2025NANU4002.

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Dans un monde confronté à l’urgence du changement climatique, les microgrids offrent une solution prometteuse pour concevoir des systèmes énergétiques durables. En particulier, les microgrids en courant continu (DC) isolés, fonctionnant indépendamment des réseaux électriques traditionnels, présentent des défis et des opportunités uniques. Le microgrid étudié dans ce travail est un microgrid DC isolé, composé de panneaux solaires, de batteries, d’un générateur diesel ainsi que de charges électriques résidentielles. Ce travail s’inscrit dans un effort global visant à réduire les émissions de gaz
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13

Cheng, Tian. "Topology Derivation and Development of Non-Isolated Three-port Converters for DC Microgrids." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/16893.

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Currently, three-port converters (TPCs) are gaining popularity in applications which integrate renewable energies, such as photovoltaics and wind, and energy storage elements, such as batteries and supercapacitors with load. This is due to the advantages of a single power conversion stage between any two ports for better conversion efficiency and a highly integrated structure for compactness. Most of the reported TPCs focus on the consuming load. However, there are applications such as hybrid-electric vehicle braking systems and DC microgrids which have power generating capability. A typical e
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14

Moradinegade, Dizqah Arash. "Non-linear model predictive energy management strategies for stand-alone DC microgrids." Thesis, Northumbria University, 2014. http://nrl.northumbria.ac.uk/17747/.

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Due to substantial generation and demand fluctuations in stand-alone green micro-grids, energy management strategies (EMSs) are becoming essential for the power sharing purpose and regulating the microgrids voltage. The classical EMSs track the maximum power points (MPPs) of wind and PV branches independently and rely on batteries, as slack terminals, to absorb any possible excess energy. However, in order to protect batteries from being overcharged by realizing the constant current-constant voltage (IU) charging regime as well as to consider the wind turbine operational constraints, more flex
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15

Campanella, Andrew. "An analysis of the viability and competitiveness of DC microgrids in northern India." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/100357.

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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 71-74).<br>The electrification of rural and remote villages in developing countries poses major challenges. While extension of the central power grid offers economies of scale in generation and transmission, distribution infrastructure to reach remote areas can be prohibitively costly to install and maintain. The low demand of newly electrified customers
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16

Ballukja, Erjon. "Power Quality Analysis in DC/DC Converters under Steady State and Transient Conditions." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The modern electric power systems are going through significant changes because of continuous increasing demand of electric power. Further, a growing number of renewable energy systems that directly deliver DC power jointly considered with the advance in DC technology allows a more efficient and affordable use of energy. Furthermore, a rising use of DC systems and microgrids in a wide number of applications has motivated the study of Power Quality (PQ). The concept of power quality in DC systems and microgrids brings many challenges and the aim of this thesis is to understand the delivered pow
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17

Pang, Shengzhao. "Contribution to Stability Analysis and Stabilization of DC Microgrids : Application of the Concept of Passivity." Electronic Thesis or Diss., Université de Lorraine, 2020. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2020_0121_PANG.pdf.

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Cette thèse se concentre sur le problème de stabilité des micro-réseaux DC, en particulier dans les applications de transport électrifié. L'objectif principal de cette thèse est de résoudre les problèmes de stabilité et de trouver des améliorations liées à l'analyse de stabilité et à la stabilisation des micro-réseaux DC. Dans les applications considérées, la stabilité est toujours un critère clé dans la conception des micro-réseaux DC. Ces systèmes, constitués principalement de plusieurs convertisseurs et filtres LC en cascade et/ou en parallèle, peuvent souffrir d'instabilité, même si chacun
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18

Igual, Escriche Miguel. "Assessing the feasibility of implementing DC-microgrids in addition to USB-C and rooftop PV in households." Thesis, KTH, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-245189.

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This Thesis’s frame is the feasibility of DC-microgrids at buildings environment. Nowadays, there is plenty of literature available regarding the benefits of implementing DC at buildings instead of AC as a means of optimizing photovoltaic generation PV on the grounds of minimizing conversion losses, with an overall energy saving of about 5-12% [1] [2]. Studies conclude that even more energy, up to 14%, could be saved if Local Energy Storage (LES) was also integrated in the equation [1]. Basing its findings on this data and on the many papers and publications that ratify these conclusions, this
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19

Perez, Filipe. "Control of AC/DC Microgrids with Renewables in the Context of Smart Grids : Including Ancillary Services and Electric Mobility." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASG011.

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Les Microgrids sont une excellente solution aux problèmes actuels soulevés par la croissance constante de la demande de charge et la forte pénétration des sources d’énergie renouvelables, qui se traduisent par une modernisation du réseau grâce au concept de “Smart-Grids”. L’impact des sources d’énergie distribuées basées sur l’électronique de puissance est une préoccupation importante pour les systèmes d’alimentation, où la régulation naturelle de la fréquence du système est entravée en raison de la réduction de l’inertie. Dans ce contexte, les réseaux à courant continu (CC) sont considérés co
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20

Oliveira, Hércules Araújo. "Rede híbrida de distribuição de energia em CC e CA como solução alternativa para microrredes isoladas." Universidade Federal do Maranhão, 2017. http://tedebc.ufma.br:8080/jspui/handle/tede/1408.

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Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-05-16T18:46:41Z No. of bitstreams: 1 HerculesAraujo.pdf: 4155547 bytes, checksum: a184b99018c0f978ec408861bdd090df (MD5)<br>Made available in DSpace on 2017-05-16T18:46:41Z (GMT). No. of bitstreams: 1 HerculesAraujo.pdf: 4155547 bytes, checksum: a184b99018c0f978ec408861bdd090df (MD5) Previous issue date: 2017-03-13<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPQ)<br>This work proposes a topology of isolated microgrids with hybrid network (part in DC and part in AC) of electric power distribution. This topolog
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21

Zia, Muhammad Fahad. "On energy management optimization for microgrids enriched with renewable energy sources Microgrids energy management systems: a critical review on methods, solutions, and prospects, in Applied Energy 222, July 2018 Optimal operational planning of scalable DC microgrid with demand response, islanding, and battery degradation cost considerations, in Applied Energy 237, March 2019 Energy management system for an islanded microgrid with convex relaxation, in IEEE Transactions on Industry Applications 55, Nov.-Dec. 2019 Microgrid transactive energy: review, architectures, distributed ledger technologies, and market analysis, in IEEE Access, January 2020." Thesis, Brest, 2020. http://theses-scd.univ-brest.fr/2020/These-2020-SPI-Genie_electrique-ZIA_Muhammad_Fahad.pdf.

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Le réseau électrique actuel est confronté à plusieurs défis liés aux exigences environnementales, à l'augmentation de la demande mondiale d'électricité, aux contraintes de fiabilité élevées, à la nécessité d’une énergie décarbonisée et aux restrictions de planification. Afin d’évoluer vers un système d'énergie électrique respectueux de l’environnement et intelligent, les installations de production centralisées sont de nos jours transformées en de plus petites centrales de génération distribuées. Le concept de micro-réseau émerge ainsi. Le micro-réseau peut être considéré comme un système de d
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22

Hafsi, Karem. "Approche distribuée basée sur un système multi-agent pour l'optimisation énergétique d'un micro-réseau de distribution DC." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALT004.

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L’apport scientifique de cette thèse se concentre sur la résolution des défis particuliersliés à la stabilité et à l’optimisation des réseaux de distribution en courant continu (DC).Cette recherche vise à élaborer des stratégies de contrôle et des algorithmes d’optimisation avancés afin de maximiser l’intégration des sources d’énergies renouvelables en courantcontinu tout en minimisant les pertes d’énergie dans le but d’atteindre l’auto-consommation.L’architecture matérielle proposée dans ce travail s’appuie sur deux technologies de distribution électrique en courant continu, à savoir le Power
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Silva, Felipe Simoes Freitas e. "INVERSOR BIDIRECIONAL PARA CONTROLE DE FLUXO DE POTENCIA EM MINIRREDES COM GERACAO DISTRIBUIDA." Universidade Federal do Maranhão, 2014. http://tedebc.ufma.br:8080/jspui/handle/tede/520.

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Made available in DSpace on 2016-08-17T14:53:28Z (GMT). No. of bitstreams: 1 Dissertacao Felipe Simoes Freitas e Silva.pdf: 5795737 bytes, checksum: dc589a2115d1b568db1a3c2b9de3f80c (MD5) Previous issue date: 2014-04-25<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This work presents the study, modelling and assembling of a three-phase bidirectional DCAC converter suitable for operating as an interface between an energy storage system based on a battery bank and an isolated microgrid. The converter consists of two stages: a DC-DC stage implemented with a bidirectional
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24

Al, Khusaibi Sulaiman Khalifa. "DC microgrid simulation and control." Thesis, Al Khusaibi, Sulaiman Khalifa (2017) DC microgrid simulation and control. Honours thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/38683/.

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However, one of the primary challenges in the microgrid is controlling power electronic devices when it is coordinated with the utility grid. The control system in the microgrid has the main objectives, to ensure supply power to the critical loads, to connect and disconnect the load in case of any fault occurring in the microgrid. This thesis investigates different types of strategies used to control and manage a microgrid; also, the report considers inverter control in islanded mode. This thesis explores the ideas for controlling a microgrid in terms of voltage control in both centralized
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Datta, Amit Jyoti. "Operation and Control of DC Microgrid." Thesis, Curtin University, 2019. http://hdl.handle.net/20.500.11937/76951.

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Power harnessing technology from the renewable energy resources has been developed over the past two decades. This technology enabled us to integrate renewable energy-based power generation to the conventional electric power grid. This study aims to improve the dynamic response and the load regulation using improved control strategies of the dc converters used to interface utility and renewable energy-based power generation. The power sharing between multiple dc microgrids/ac-dc microgrids is also investigated.
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26

Ahmed, Oday Ali. "Investigation into high efficiency DC-DC converter topologies for a DC microgrid system." Thesis, University of Leicester, 2012. http://hdl.handle.net/2381/10165.

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Distributed generation in the form of DC microgrids has recently attracted increasing research interest. For integrating primary sources and energy storage devices to the DC bus of a DC microgrid power electronic converters are necessary, but the associated losses may degrade the microgrid efficiency. Therefore, the aim of this work is to develop high-efficiency converters, particularly for fuel cell generators and ultracapacitors energy buffers suitable for use in a stationary distribution system. Based on the evaluation of the fuel cell dynamic performance, a current–fed DC–DC converter desi
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Chen, Dong. "Control and operation of a DC microgrid." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.579682.

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This thesis presents several aspects of the control and operation of a DC micro grid with variable generation and energy storage. These aspects mainly concern the dynamic performance improvement of energy storage interface converters, a standardized autonomous control strategy for a DC microgrid, and its stability and dynamics assessment method. Several predictive average current control schemes are proposed for a bi-directional DC- DC converter which is used to interface the energy storage device to the DC microgrid. By properly arranging the sampling and duty cycle updating points, optimal c
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28

Castro, Lino Alfredo de. "Design Of DC/DC Z-source converter for a photovoltaic system connected to DC microgrid." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16768.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>This work proposes study and implementation of a DC/DC Z-source converter operating in continuous conduction mode (CCM); It is applied to a photovoltaic system connected to a DC microgrid; aiming to inject the electricity supplied from PV array; To this end; the PV array is connected to the input of Z-source converter; which rises from 167V to 400V and injects the output current at the DC bus; using maximum power point tracking techniques (MPPT); The prototype implemented in the laboratory was developed for 1;38 kW output power;
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29

Tran, Thanh Kha. "Power Line Communication (PLC) for DC Microgrid systems." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSE1035.

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L'utilisation de fils électriques pour fournir des capacités de transmission de données, connues sous le nom de Courant Porteur en Ligne (CPL), a beaucoup évolué au cours des dernières années afin de pouvoir répondre à des besoins croissants de transfert de données l’impliquant la communauté scientifique, la recherche industrielle, ainsi que des organismes de réglementation et de normalisation. Les réseaux CPL offrent un certain nombre d’avantages qui en font un complément utile et un concurrent fort pour les solutions de réseau sans fil. Le principal intérêt des réseaux CPL réside sur le coût
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Pires, Lucas Pereira. "Projeto e desenvolvimento de um inversor solar ponte completa bidirecional para microrredes CC conectadas à rede CA em baixa tensão." Universidade Federal de Uberlândia, 2016. https://repositorio.ufu.br/handle/123456789/18078.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Este trabalho apresenta a proposta e análise de um Inversor Ponte Completa Bidirecional (IPCB) aplicado a microrredes CC (corrente contínua) no que tange ao seu desempenho na injeção de potência ativa na rede em corrente alternada (CA) e à regulação da tensão no barramento CC diante das inerentes intermitências observadas em geradores fotovoltaicos, as quais não devem provocar distúrbios nas cargas conectadas à Microrrede CC. A estratégia de controle digital é implementada a partir de um DSP (Digital Signal Processor) contando com
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Carbone, Marc A. "HIERARCHICAL DECENTRALIZED CONTROL TECHNIQUES OF A MODEL DC MICROGRID." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1464259866.

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Sun, Jiwei. "Voltage Regulation of DC-microgrid with PV and Battery." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1491317136778018.

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Yang, Nanfang. "Control and analysis of DC Microgrid with multiple distributed generators." Thesis, Belfort-Montbéliard, 2015. http://www.theses.fr/2015BELF0275/document.

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L'intégration des sources d'énergies renouvelables sur le réseau électrique est complexe en raison de leur nature intermittente et décentralisée. Le micro-réseau est une approche prometteuse pour interconnecter des générateurs distribués (DGs) locaux, alimenter des charges locales et également échanger de l'énergie avec le réseau électrique de manière contrôlée. Ce mode de production/consommation locales permet d'éviter la transmission d'électricité sur de longues distances, et implique donc une plus grande efficacité. Ces travaux se concentrent sur l'analyse et le contrôle du micro-réseau con
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34

Guo, Qihao. "On control strategies of switched reluctance generator-based DC microgrid." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST002.

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Les microréseaux (MG) à courant continu (DC) sont une solution prometteuse pour l’intégration massive des énergies renouvelables dans la production durable et décentralisée d’énergie électrique pour s’inscrire dans la transition énergétique. En tant que sous-système du micro-réseau, la machine à réluctance variable (MRV) est une solution sans terres rares pour des systèmes de conversion de l’énergie éolienne (SCEE) à petite échelle. Cependant, la commande de la Génératrice à Réluctance Variable (GRV) dans les applications MG est un défi en raison de la forte non-linéarité de son modèle. L’obje
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Ma, Thi Thuong Huyen. "Evaluation of DC supply protection for efficient energy delivery in low voltage applications." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1055/document.

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Actuellement, il y a une baisse du prix des ressources énergétiques distribuées, en particulier l'énergie solaire photovoltaïque, conduisant à la croissance significative de leur capacité d'installation dans de nombreux pays. D'autre part, les politiques encourageant l'efficacité énergétique ont favorisé le développement de charges DC dans les zones domestiques, telles que l'éclairage LED, les ordinateurs,, les téléphones, les téléviseurs, les moteurs DC efficaces et les véhicules électriques. Grace à ce changement, le système de distribution de microgrid DC devient plus attractive que le syst
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Khodamoradi, Aram. "Stability Monitoring and Controller Autotuning of Power Converters in DC Microgrid." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3422335.

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Recently, there has been an increasing interest towards grouping several power resources together with some loads as well as some energy storage systems in a microgrid environment. This is mainly because a high number of distributed energy resources (DERs), such as renewable energies and energy storage systems can be integrated in a microgrid environment, that, in turn, will lead to a reduction in the transmission and distribution losses, the overall system costs, as well as the CO2 emissions. In addition, as the generation is going to be mostly near to the consumption point, the power quality
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Ali, Sadaqat. "Energy management of multi-source DC microgrid systems for residential applications." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0159.

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Comparé au réseau électrique alternatif (AC), le réseau électrique en courant continu (DC) a démontré de nombreux avantages tels que son interface naturelle avec les RES, les systèmes de stockage d'énergie et les charges en courant continu, une efficacité supérieure avec moins d'étapes de conversion, et un contrôle plus simple sans effet de peau et sans considérations sur le flux de puissance réactive. Le micro-réseaux DC reste une technologie relativement nouvelle, et ses architectures de réseau, stratégies de contrôle, techniques de stabilisation méritent d'énormes efforts de recherche. Dans
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38

Ensini, Luca. "Measurement and simulation of conducted disturbances on DC power grids of a HVDC system with an active DC/DC converter." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15332/.

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With the increasing of the distributed generation, DC microgrids have become more and more common in the electrical network. To connect devices in a microgrid, converter are necessary, but they are also source of disturbances due to their functioning. In this thesis, measurement and simulation of conducted emissions, within the frequency range 2-150kHz, of a DC/DC buck converter are studied.
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39

Qiao, Feng. "Hybrid AC/DC distribution network voltage control." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/22978.

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A hybrid AC/DC distribution network can be formed after integration of increasing numbers of electronically interfaced distributed generators (DGs) and microgrids (MGs). Voltage/Var control (VVC) in this evolved system requires to control not only the traditional VVC resources such as transformer tap changer and shunt capacitor but also the newly emerged ones such as DGs and MGs. In addition, various stakeholders such as MG's operator and distribution network operator coexist in this evolved system. They usually represent distinct operational interests and make the VVC even more difficult. The
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40

Hashemi, Farzad Tabassom. "Life Cycle Assessment (LCA) for a DC-microgrid energy system in Fjärås." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263173.

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Application of Photovoltaic PV panels for electricity production has rapidly increased in recent years in Sweden after launching a capital subsidy for PV panel installations in 2009. Kungsbacka municipality’s housing company equipped two groups of buildings in Fjärås with PV systems to generate electricity. The newly built residential buildings are connected to a DC-microgrid, whereas the existing buildings have been equipped with a single PV system. This project conducts a cradle to gate life cycle assessment (LCA) for this DC-microgrid energy system. The main purpose of this project is to de
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41

Santos, Heron Alves dos. "Design of a controlled single-phase ac-dc converter for interconnection of DC and AC buses of a microgrid." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12977.

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The recent growth expectation of the participation of solar-photovoltaic energy sources in the power generation matrix has significantly increased the number of grid-connected systems. For connection to power grid, it is essential to use a dc-ac converter, which is able to suit the characteristics of the power provided by the photovoltaic modules to grid parameters. This dissertation presents a project proposal of a 2 kW single phase dc-ac converter for connecting a 311 V dc bus to a 220 Vrms ac bus of a microgrid. The proposed converter is bidirectional and allows, when necessary, the power f
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42

Costanza, Erasmo. "Modelli e strumenti per ottimizzazione di microgrid in corrente continua." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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La richiesta di energia elettrica è in continuo aumento, tale fenomeno ha avuto una forte accentuazione negli ultimi decenni. L'IEA (International Energy Agency) ha stimato un aumento pari a circa il 40% nei prossimi 20 anni. Questo fenomeno ha spinto il mercato dell’energia a trovare nuove soluzioni atte a fronteggiare le nuove richieste. Per questo motivo è stato introdotto il concetto di generazione distribuita DG, quali impianti di piccola taglia spesso legati alla produzione da fonti rinnovabili. Queste DG possono lavorare in parallelo alla rete o essere introdotte all’interno di una Micr
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43

Trigueiro, dos Santos Leonardo. "Contribution on the day-ahead and operational optimization for DC microgrid building-integrated." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2352/document.

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Cette recherche se concentre sur l'optimisation d'un micro-réseau en interaction avec le réseau électrique intelligent. Il s'agit de la recherche de solutions optimales pour la conception d'un micro-réseau afin de minimiser les coûts, d'une part, et la possibilité augmenter 1'utilisation des sources renouvelables, d'autre part. La supervision, doit traiter la prise en compte des incertitudes dans la gestion prédictive optimisée des flux de puissance<br>This thesis study focuses on a DC microgrid building-integrated satisfying the power balance at the local level and supplying DC loads during b
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44

Wang, Bowen. "Control and Stability of Residential Microgrid with Grid-Forming Prosumers." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/27347.

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The rise of the prosumers (producers-consumers), residential customers equipped with behind-the-meter distributed energy resources (DER), such as battery storage and rooftop solar PV, offers an opportunity to use prosumer-owned DER innovatively. The thesis rests on the premise that prosumers equipped with grid-forming inverters can not only provide inertia to improve the frequency performance of the bulk grid but also support islanded operation of residential microgrids (low-voltage distribution feeder operated in an islanded mode), which can improve distribution grids’ resilience and reliabil
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45

Sarker, Partha Sarathi. "DYNAMIC MODELING, STABILITY ANALYSIS AND CONTROL OF AC/DC INTERCONNECTED MICROGRID USING DQ-TRANSFORMATION." Master's thesis, Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/518146.

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Electrical and Computer Engineering<br>M.S.E.E.<br>In recent years, there have been significant changes in power systems due to the integration of renewables, distributed generation, switched power loads, and energy storage systems, etc. Locally these AC/DC microgrids include both DC generation (such as solar PV) and AC generation (such as wind generation), various DC and AC loads, converters and inverters, and energy storage systems, such as storage batteries and supercapacitors. DC systems are often characterized as low inertia systems whereas AC generation and systems are usually high inert
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46

Yin, Changjie. "Impact of diesel generator operating modes on standalone DC microgrid and control strategies implying supercapacitor." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2411/document.

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La nature intermittente et aléatoire des sources renouvelables, telles que le photovoltaïque et l’éolien, nécessite un complément de stockage, tel une batterie et un système de secours énergétique, tel un générateur diesel, en particulier dans un système autonome. En ce qui concerne le générateur diesel, il a besoin d'un certain temps pour démarrer et il ne peut pas donner immédiatement la puissance nécessaire, en raison de son comportement dynamique. Alors, la qualité de l'énergie est abaissée pendant cette période en raison du manque de puissance. Par conséquent, pendant la période de démarr
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47

Granger, Matthew G. "A Combined Framework for Control and Fault Monitoring of a DC Microgrid for Deep Space Applications." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1607694725020458.

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48

Chen, Fang. "Control of DC Power Distribution Systems and Low-Voltage Grid-Interface Converter Design." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/77532.

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DC power distribution has gained popularity in sustainable buildings, renewable energy utilization, transportation electrification and high-efficiency data centers. This dissertation focuses on two aspects of facilitating the application of dc systems: (a) system-level control to improve load sharing, voltage regulation and efficiency; (b) design of a high-efficiency interface converter to connect dc microgrids with the existing low-voltage ac distributions, with a special focus on common-mode (CM) voltage attenuation. Droop control has been used in dc microgrids to share loads among multip
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49

Roggia, Leandro. "Novo conversor CC-CC integrado full-bridge-forward aplicado a uma microrrede residencial." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/3676.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This Ph.D. Dissertation focuses on the proposal of a novel converter topology applied to the connection of an energy storage system, composed of a supercapacitor bank and a battery bank, to the dc bus of a residential microgrid. The proposed full-bridge-forward integrated dc-dc converter presents high voltage gain between the input and output, a fundamental requirement for the desired application, bidirectional power flow, galvanic isolation, among other features. The integration process, operation stages (including converter wavef
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García, Elvira David. "Contributions on DC microgrid supervision and control strategies for efficiency optimization through battery modeling, management, and balancing techniques." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/672010.

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Aquesta tesi presenta equips, models i estratègies de control que han estat desenvolupats amb l'objectiu final de millorar el funcionament d'una microxarxa CC. Es proposen dues estratègies de control per a millorar l'eficiència dels convertidors CC-CC que interconnecten les unitats de potència de la microxarxa amb el bus CC. La primera estratègia, Control d'Optimització de Tensió de Bus centralitzat, administra la potència del Sistema d'Emmagatzematge d'Energia en Bateries de la microxarxa per aconseguir que la tensió del bus segueixi la referència dinàmica de tensió òptima que minimitza les
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