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Dissertations / Theses on the topic 'Distribued control'

Author: Grafiati

Published: 4 May 2024

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1

Piardi, Artur Bohnen. "Proposta de uma estrutura híbrida de controle para sistemas de excitação de geradores síncronos distribuídos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-19032018-075506/.

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Com o advento da geração distribuída foi permitido aos sistemas de distribuição a possibilidade de operação de forma ilhada dos sistemas interligados de grande porte. Apesar de suas vantagens, do ponto de vista técnico, ainda existe uma série de desafios que necessitam ser superados para a plena aplicação desse conceito. Um desses desafios é definido pela transição dos modos operativos dos geradores distribuídos durante o processo de ilhamento. Da forma em que é reportada na literatura, infere-se que tal transição é realizada de um modo inadequado, amplificando os transitórios observados nas g

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2

Pham, Hoang Anh. "Coordination de systèmes sous-marins autonomes basée sur une méthodologie intégrée dans un environnement Open-source." Electronic Thesis or Diss., Toulon, 2021. http://www.theses.fr/2021TOUL0020.

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Cette thèse étudie la coordination de robots sous-marins autonomes dans le contexte d’exploration de fonds marins côtiers ou d’inspections d’installations. En recherche d’une méthodologie intégrée, nous avons créé un framework qui permet de concevoir et simuler des commandes de robots sous-marins low-cost avec différentes hypothèses de modèle de complexité croissante (linéaire, non-linéaire, et enfin non-linéaire avec des incertitudes). Sur la base de ce framework articulant plusieurs outils, nous avons étudié des algorithmes pour résoudre le problème de la mise en formation d’un essaim, puis

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3

Nguyen, Thi Thanh Quynh. "A new approach for distributed programming in smart grids." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAT079.

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Le principal défi du contrôle et de la gestion des réseaux électriques intelligents (Smartgrids) est la quantité de données à traiter. Les techniques classiques centralisées, même si elles offrent l’avantage de facilité de gestion par leur vision globale du réseau, ne supportent pas en pratique la croissance continue des volumes de données (bande passante limitée, goulot d’étranglement, quantité de calculs à assurer, etc.). Le passage à un contrôle et une gestion décentralisée (répartie), où le système est composé d’une multitude d’unités de calcul coopérantes, offre de très bonnes perspective

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4

Dal, col Laura. "On distributed control analysis and design for Multi-Agent systems subject to limited information." Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0034/document.

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Les systèmes multi-agents sont des systèmes dynamiques composés par plusieurs éléments qui interagissent entre eux. Ces éléments sont appelés agents. Un agent est un système dynamique caractérisé par deux propriétés. La première est que les agents sont autonomes— c’est-à-dire qu’ils ne sont pas dirigés par l’environnement extérieur et ils peuvent évoluer selon un comportement auto-organisé. La seconde est que les agents sont capables de communiquer entre eux pour accomplir des tâches complexes, telles que la coopération, la coordination et la résolution de conflits. L’un des problèmes courants

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5

Rossi, Luís Filipe Fragoso de Barros e. Silva. "Sistema para sensoriamento e controle para aplicações em biomecatrônica." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-10052012-121527/.

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Diversos trabalhos relacionados ao desenvolvimento de dispositivos robóticos biomecatrônicos estão sendo realizados em vários laboratórios no mundo. Apesar desta crescente tendência, devido a uma falta de padronização nas tecnologias utilizadas, em especial no sistema de sensoriamento e controle, há uma grande divergência nos sistemas resultantes. De forma a se conseguir atender os requisitos dos projetos, muito tempo é despendido no desenvolvimento de sistemas de sensoriamento e controle dedicados. Dentro deste cenário, neste trabalho foi projetado e implementado um sistema de sensoriamento e

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6

Gionfra, Nicolo. "Stratégies de commande distribuée pour l’optimisation de la production des fermes éoliennes." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC017/document.

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Les travaux de thèse s’intéressent au réglage de la puissance active injectée dans le réseau, ce qui représente aujourd'hui l'une des problématiques principales du pilotage des parcs éoliens participant à la gestion du réseau. Dans le même temps, l'un des buts reste de maximiser la puissance extraite du vent en considérant les effets de couplage aérodynamique entre les éoliennes.La structure du contrôle-commande choisie est de type hiérarchisée et distribuée. Dans la première partie de la thèse, les travaux portent sur la commande de la turbine d'une éolienne autour des points de fonctionnemen

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7

Rawlings, Trevor. "Distributed control architecture." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/6077.

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This document describes the development and testing of a novel Distributed Control Architecture (DCA). The DCA developed during the study is an attempt to turn the components used to construct unmanned vehicles into a network of intelligent devices, connected using standard networking protocols. The architecture exists at both a hardware and software level and provides a communication channel between control modules, actuators and sensors. A single unified mechanism for connecting sensors and actuators to the control software will reduce the technical knowledge required by platform integrators

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8

Iyer, Ranjit. "Probabilistic distributed control." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1568128211&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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9

Fabbiano, Ruggero. "Collaborative source-seeking control." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT038/document.

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Cette dissertation fait face au problème de la localisation de sources, un sujet qui a été largement étudié dans la littérature récente au vu de son grand nombre d'applications. En particulier, ce travail se concentre sur le pilotage de multiples capteurs, capables de prendre des mesures ponctuelles de la quantité émise, vers la source sans faire usage d'aucune information de position, qui se trouve être indisponible dans de nombreux cas pratiques (par exemple, sous l'eau ou dans l'exploration souterraine). En faisant quelques hypothèses sur le processus de diffusion, nous développons un modèl

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10

Reis, Giann Braune. "Estratégia de controle fuzzy para um grupo motor gerador a diesel operando isolado ou conectado à rede de distribuição." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-23022015-133705/.

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Esta tese propõe uma estratégia de controle fuzzy para um grupo motor gerador a diesel como uma fonte de geração distribuída, cobrindo a parte mecânica do sistema que é composta por controle de velocidade e de potência ativa, a parte elétrica do sistema composta por controle de tensão e potência reativa, e também o controle de sincronismo com a rede de distribuição. A estratégia de controle foi baseada em lógica fuzzy que usou uma superfície de controle fixa para os controladores fuzzy. Foram investigados os distúrbios causados pelo efeito de conexão com a rede e da conexão de um motor de indu

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11

Renzaglia, Alessandro. "Optimisation stochastique et adaptative pour surveillance coopérative par une équipe de micro-véhicules aériens." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00721748.

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L'utilisation d'équipes de robots a pris de l'ampleur ces dernières années. Cela est dû aux avantages que peut offrir une équipe de robot par rapport à un robot seul pour la réalisation d'une même tâche. Cela s'explique aussi par le fait que ce type de plates-formes deviennent de plus en plus abordables et fiables. Ainsi, l'utilisation d'une équipe de véhicules aériens devient une alternative viable. Cette thèse se concentre sur le problème du déploiement d'une équipe de Micro-Véhicules Aériens (MAV) pour effectuer des missions de surveillance sur un terrain inconnu de morphologie arbitraire.

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12

Noubissie-Tchako, Jean-Félix. "Contribution à la conception d'un système de pilotage distribué pour les systèmes automatisés de production." Valenciennes, 1994. https://ged.uphf.fr/nuxeo/site/esupversions/b009a7c7-9c4b-406f-85e9-3c092db6d043.

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Les unités de production sont actuellement soumises à de fortes contraintes de productivité et de flexibilité. Les problèmes à résoudre sont relatifs au pilotage des installations avec prise en compte des perturbations, à la surveillance, au contrôle et à l'exploitation des équipements ainsi qu'au rôle des opérateurs. Il s'agit de rendre et de maintenir opérationnels les différents éléments de l'installation, de les synchroniser, de les coordonner et d'intégrer les ressources humaines et matérielles, dans une approche de gestion en flux tendus. Dans ce mémoire nous décrivons les principales fo

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13

Schmidt, Ronald. "Distributed Access Control System." Universitätsbibliothek Chemnitz, 2001. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200100336.

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14

Hamid, Tariq Parwaiz. "Control of distributed objects." Thesis, University of the West of Scotland, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260344.

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15

Wang, Zongyao. "Distributed robot flocking control." Thesis, University of Essex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499765.

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16

Huang, Qiang. "Distributed embedded control system." Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400230.

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17

OLIVEIRA, Érika Matos de. "Comparação dos Métodos de Paralelismo de Conversores para o Compartilhamento de Potência em Microrredes." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18269.

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Submitted by Irene Nascimento (irene.kessia@ufpe.br) on 2017-01-27T17:17:31Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao_Erika_1.pdf: 4090096 bytes, checksum: aad3d3481e2a810cc8765c9bade0883b (MD5)<br>Made available in DSpace on 2017-01-27T17:17:31Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao_Erika_1.pdf: 4090096 bytes, checksum: aad3d3481e2a810cc8765c9bade0883b (MD5) Previous issue date: 2016-07-29<br>FACEPE<br>Microrrede é um conjunto de geração distrib

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18

Johansson, Olof, and Daniel Persson. "Workflows and Distributed Version Control." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3613.

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This bachelor thesis focuses on distributed version control systems and workflows used when working with such systems. The thesis will investigate benefits and disadvantages in using distributed version control in software development using a literature review of the available articles on the subject as well as a post-mortem analysis (with questionnaires and data collected from the build environment) of a student run software engineering project. We find that the migration costs are high, but that the advantages may outweigh its drawbacks for some. We conclude that many projects would benefit

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19

Dev, Kashinath. "Concurrency control in distributed caching." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-10112005-172329/.

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Replication and caching strategies are increasingly being used to improve performance and reduce delays in distributed environments. A query can be answered more quickly by accessing a cached copy than making a database round trip. Numerous techniques have been proposed to achieve caching and replication in various contexts. In our context of flat cluster-based networks, we have observed that none of the schemes prove to be optimal for all scenarios. In this thesis we look at concurrency control techniques for achieving consistency in distributed caching in flat cluster-based networks. We then

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20

Shucker, Brian. "Control of distributed robotic macrosensors." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3239382.

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21

Field-Richards, Hugh Sherwood. "A distributed control microprocessor system." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37693.

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22

Zhao, Fang Ph D. Massachusetts Institute of Technology. "Distributed control of coded networks." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/57776.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 97-101).<br>The introduction of network coding has the potential to revolutionize the way people operate networks. For the benefits of network coding to be realized, distributed solutions are needed for various network problems. In this work, we look at three aspects of distributed control of coded networks. The first one is distributed algorithms for establishing minimum-cost multicast connection

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23

Burdis, Keith Robert. "Distributed authentication for resource control." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1006512.

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This thesis examines distributed authentication in the process of controlling computing resources. We investigate user sign-on and two of the main authentication technologies that can be used to control a resource through authentication and providing additional security services. The problems with the existing sign-on scenario are that users have too much credential information to manage and are prompted for this information too often. Single Sign-On (SSO) is a viable solution to this problem if physical procedures are introduced to minimise the risks associated with its use. The Generic Secur

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Phadke, Swanand Shripad. "Distributed Control for Smart Lighting." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274899902.

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25

Deshpande, Pranav. "Distributed Supervisory Control of Workflows." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000209.

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26

Chauvet, Mathieu. "The management of distances in distributed-work : a Deleuzian approach to control." Thesis, Paris 9, 2012. http://www.theses.fr/2012PA090053.

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L’émergence du travail à distance a causé l’apparition de nombreux challenges pour les managers et leurs subordonnés. Par conséquent, maintenir une forme de surveillance s’avère plus que jamais nécessaire, notamment car le contrôle représente un moyen significatif pour réduire la problématique de la distance. Au regard du bouleversement conséquent amené par ce développement exponentiel des technologies, il convient de s’interroger sur la façon dont les processus de contrôle ont été remis en question dans le cadre de la rupture managériale introduite par le travail à distance. Notre réflexion t

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27

Costello, Zachary Kohl. "Distributed computation in networked systems." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54924.

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The objective of this thesis is to develop a theoretical understanding of computation in networked dynamical systems and demonstrate practical applications supported by the theory. We are interested in understanding how networks of locally interacting agents can be controlled to compute arbitrary functions of the initial node states. In other words, can a dynamical networked system be made to behave like a computer? In this thesis, we take steps towards answering this question with a particular model class for distributed, networked systems which can be made to compute linear transformations.

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28

Garonne, Vincent. "Etude, définition et modélisation d'un système distribué à grande échelle : DIRAC - Distributed infrastructure with remote agent control." Aix-Marseille 2, 2005. http://theses.univ-amu.fr.lama.univ-amu.fr/2005AIX22057.pdf.

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29

Charrier, Rodolphe. "L'intelligence en essaim sous l'angle des systèmes complexes : étude d'un système multi-agent réactif à base d'itérations logistiques couplées." Phd thesis, Université Nancy II, 2009. http://tel.archives-ouvertes.fr/tel-00442841.

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L'intelligence en essaim constitue désormais un domaine à part entière de l'intelligence artificielle distribuée. Les problématiques qu'elle soulève touchent cependant à de nombreux autres domaines ou questions scientifiques. En particulier le concept d'essaim trouve pleinement sa place au sein de la science dites des ``systèmes complexes''. Cette thèse présente ainsi la conception, les caractéristiques et les applications d'un modèle original, le SMA logistique, pour le domaine de l'intelligence en essaim. Le SMA logistique trouve son origine en modélisation des systèmes complexes : il est en

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Iutzeler, Franck. "Estimation et Optimisation Distribuée pour les Réseaux Asynchrones." Phd thesis, Telecom ParisTech, 2013. http://tel.archives-ouvertes.fr/tel-00927646.

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Cette thèse s'intéresse au problème d'estimation et d'optimisation distribuée dans les réseaux asynchrones, c'est à dire en n'utilisant que des communications locales et asynchrones. A partir de multiples applications allant de l'apprentissage automatique aux réseaux de capteurs sans-fils, nous concevons et analysons théoriquement de nouveaux algorithmes résolvant trois problèmes de nature très différentes : la propagation de la plus grande des valeurs initiales, l'estimation de leur moyenne et enfin l'optimisation distribuée.

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31

Lundin, Mats. "Building Distributed Control Systems Using Distributed Active Real-Time Databases." Thesis, University of Skövde, Department of Computer Science, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-234.

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<p>From the field of control theory, we can see that varying communication delays in a control system may be hard or even impossible to handle. From this point of view it is preferable to have these delays bounded and as small and as possible in order to adapt the control process to them. On the other hand, in some cases delays are inevitable and must be handled by the control system.</p><p>A control system may for different reasons be distributed, e.g., because of a distributed environment or severe environment demands such as heat or dust at some locations. Information in such a system will

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Abeysekera, Don Cecil Rohantha. "Performance of thread based distributed systems." Thesis, University of Kent, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334084.

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Wen, Guoguang. "Distributed cooperative control for multi-agent systems." Phd thesis, Ecole Centrale de Lille, 2012. http://tel.archives-ouvertes.fr/tel-00818774.

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Cette thèse considère principalement trois problèmes dans le domaine du contrôle distribué coopératif des systèmes multi-agents(SMA): le consensus, la navigation en formation et le maintien en formation d'un groupe d'agents lorsqu'un agent disparait. Nous proposons 3 algorithmes pour résoudre le problème du calcul distribué d'un consensus à partir de l'approche leadeur-suiveur dans le contexte SMA à dynamique non-linéaire. La référence est définie comme un leader virtuel dont on n'obtient, localement, que les données de position et de vitesse. Pour résoudre le problème du suivi par consensus p

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Zarate, Florez Jennifer. "Etudes de commande par décomposition-coordination pour l'optimisation de la conduite de vallées hydroélectriques." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT018/document.

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Une vallée hydroélectrique est constituée d'un nombre important de centrales interconnectées du fait de l'utilisation de la même ressource en eau. Pour pouvoir optimiser en temps réel sa production, il a été proposé dans cette thèse d'utiliser les méthodes associées aux systèmes à grande échelle pour développer les outils nécessaires. Cette étude de la commande globale du système a été orientée vers l'utilisation des méthodes de décomposition-coordination. Ces méthodes ont été examinées et appliquées à un cas d'étude simplifié (une partie de la vallée hydraulique) mis à disposition par EDF. Pl

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Shigueoka, Augusto Hirao. "Otimização de filtros modais espaciais usando redes de sensores aplicados ao controle de vibrações de estruturas do tipo viga e placa." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18149/tde-25012017-163244/.

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Ao empregar a teoria de controle para a dinâmica de uma estrutura, é possível projetar um observador potencialmente complexo que a partir da leitura de apenas um sensor estime o estado do sistema e determine os modos de vibração presentes. Este trabalho, no entanto, estuda o uso de filtros modais em controle de vibrações, com a motivação de que essa estratégia dependa de menos componentes eletrônicos. O objetivo é encontrar um filtro modal que possua alto desempenho em malha fechada mesmo com um número reduzido de sensores. Primeiramente foi desenvolvido o modelo dinâmico do sistema em malha a

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Quinton, Sophie. "Design, vérification et implémentation de systèmes à composants." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00685854.

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Nous avons étudié dans le cadre de cette thèse le design, la vérification et l'implémentation des systèmes à composants. Nous nous sommes intéressés en particulier aux formalismes exprimant des interactions complexes, dans lesquels les connecteurs servent non seulement au transfert de données mais également à la synchronisation entre composants. 1. DESIGN ET VÉRIFICATION Le design par contrat est une approche largement répandue pour développer des systèmes lorsque plusieurs équipes travaillent en parallèle. Les contrats représentent des contraintes sur les implémentations qui sont préservées t

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Asadi, Fatemeh. "Self-organized distributed model predictive control." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720820.

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Reinschke, Johannes Ullrich. "H∞-control of spatially distributed systems." Thesis, University of Cambridge, 1999. https://www.repository.cam.ac.uk/handle/1810/251474.

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Segbefia, Frederick. "Optimal control of distributed energy storage." Thesis, Wichita State University, 2007. http://hdl.handle.net/10057/1554.

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It is shown in this research paper that, with the appropriate control system, a storage energy unit connected to a distribution system near the primary load, can completely level the load on a distribution feeder for any primary load profile. By doing simulations using an Excel spreadsheet, graphs were generated that show how the control system is able to achieve this objective in addition to quantifying the storage energy system to the primary load profile. Steps needed for future research projects to make the energy storage system economically viable are suggested.<br>Thesis (M.S)-- Wichita

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Khalil, Ashraf F. "Networked control of distributed energy systems." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3380/.

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This thesis reports a new method for stability analysis and maximum time delay estimation in networked control systems with applications to distributed energy systems. The proposed new method is based on using finite difference approximation for the delay term and then the Lyapunov system stability theorem is applied to derive the time delay boundary allowed to the system. The proposed method has been applied to networked control systems with state feedback controllers, with dynamic controllers, and to multi-units interconnected networked control systems. The proposed method is then extended t

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Jones, Nathaniel Matthew. "Practical algorithms for distributed network control." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85760.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 135-138).<br>Optimal routing and scheduling algorithms have been studied for decades, however several practical issues prevent the adoption of these network control policies on the Internet. This thesis considers two distinct topics in distributed network control: (i) maximizing throughput in wireless networks using network coding, and (ii) deploying controllable nodes in legacy networks. Network coding i

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Tsai, Frank J. (Frank Jin-Fong) 1976. "Distributed active control for tension structures." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/81544.

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Cosway, Paul Richard. "Replication control in distributed B-trees." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/36957.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.<br>Includes bibliographical references (p. 140-142).<br>by Paul Richard Cosway.<br>M.S.

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Kadengal, R. "Distributed control architecture for multiservice networks." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1336884/.

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The research focuses in devising decentralised and distributed control system architecture for the management of internetworking systems to provide improved service delivery and network control. The theoretical basis, results of simulation and implementation in a real-network are presented. It is demonstrated that better performance, utilisation and fairness can be achieved for network customers as well as network/service operators with a value based control system. A decentralised control system framework for analysing networked and shared resources is developed and demonstrated. This fits in

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Babazadeh, Davood. "Distributed Control of HVDC Transmission Grids." Doctoral thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202753.

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Recent issues such as priority access of renewable resources recommended by European energy directives and increase the electricity trading among countries lead to new requirements on the operation and expansion of transmission grids. Since AC grid expansions are limited by legislative issues and long distance transmission capacity, there is a considerable attention drawn to application of HVDC transmission grids on top of, or in complement to, existing AC power systems. The secure operation of HVDC grids requires a hierarchical control system. In HVDC grids, the primary control action to deal

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Akhtar, Zohaib. "Distributed voltage control and demand response." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/61346.

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Future power systems will have low inertia which will lead to larger deviations and rates of change of grid frequency. Large loss of infeed (e.g. due to a fault in the DC grid) higher than the spinning reserve can be more frequent. Also, voltage constraints will result in curtailment of renewable energy in the distribution systems. This thesis investigates the characteristics and effectiveness of the use of power electronic compensators in the control of both grid voltage and frequency through aggregated demand response in an autonomous fashion without any need for communication. Not relying o

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de, Paola Antonio. "Distributed control in the smart grid." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/43846.

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This thesis addresses some of the challenges that arise when the new smart grid paradigm is applied to power systems. In particular, novel control strategies are designed to deal in a decentralized matter with the increasing complexity of the network. Two main areas are investigated: participation to frequency control of variable-speed wind turbines and management of large populations of competing agents (e.g. micro-storage devices and "smart appliances") that exchange energy with the system. The first part of this work presents two different techniques that allow wind turbines to provide freq

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Wadoo, Sabiha Amin. "Evacuation Distributed Feedback Control and Abstraction." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/27439.

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In this dissertation, we develop feedback control strategies that can be used for evacuating people. Pedestrian models are based on macroscopic or microscopic behavior. We use the macroscopic modeling approach, where pedestrians are treated in an aggregate way and detailed interactions are overlooked. The models representing evacuation dynamics are based on the laws of conservation of mass and momentum and are described by nonlinear hyperbolic partial differential equations. As such the system is distributed in nature. We address the design of feedback control for these models in a distribute

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Rubio, Diana. "Distributed Parameter Control of Thermal Fluids." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30330.

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We consider the problem of controlling a thermal convection flow by feedback. The system is governed by the Boussinesq approximation of the coupled set of Navier-Stokes and heat equations. The control is applied through Dirichlet boundary conditions. We concentrate on a two-dimensional mode and use a semidiscrete Galerkin scheme for numerical computations. We construct both a linear control and a non-linear quadratic control and apply them to the full non-linear model. First, we test these controllers on a one-mode approximation. The convergence of the numerical scheme is analyzed. We also c

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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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