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Dissertations / Theses on the topic 'Coordination of Protection'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Mohd, Zin Abdullah Asuhaimi Bin. "Coordination of overcurrent protection." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332239.

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2

Shi, Zhanpeng. "Investigation on Generator Loss of Excitation Protection in Generator Protection Coordination." Thesis, KTH, Elektriska energisystem, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119259.

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This thesis analyzes the generator loss of excitation fault and describes an investigation on existing loss of excitation protection schemes. In addition, a simulation model is established in PSCAD to simulate the loss of excitation fault and external faults. According to the simulation results, this thesis compares the speed of different protection schemes on loss of excitation fault detection and finds the drawbacks of some protection schemes on fault detection during special operation condition. What’s more, this thesis also compares the stabilities of different loss of excitation protectio

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3

Hallett, Christine. "A case study of interagency coordination in child protection services." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/7521.

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This thesis is a case study of coordination policies and practices in child protection services. The study is an exploratory, descriptive account of the processes and outputs of interagency coordination rather than a hypothesis-testing study or an evaluation of the outcomes of coordination. It is based on empirical research undertaken in two research sites in the north of England. The principal data sources used in the research were: an analysis of the social services departmental case records relating to a sample of 48 children on child protection registers for physical or sexual abuse; inter

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4

Leelaruji, Rujiroj. "Coordination of protection system and VSC-HVDC to mitigate cascading failures." Licentiate thesis, KTH, Electric Power Systems, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-13062.

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<p>The rapid development of the global economics has made power systems allover the world become large-scale interconnected grids. This increases the capabilityof power grids to transfer power over the long distance to serve the desiredpower demand with the minimum cost of operation. Unfortunately, it alsoenables the propagation of local failures into global networks. In other words,if a blackout happens in a power system, the size and the damage may significantlyincrease.</p><p>One of the main ways in which blackouts become widespread is cascadingfailures. This type of failure originates afte

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5

Ezzeddine, Mazhar. "Etude et coordination de protections dans les réseaux électriques." Paris 11, 2010. http://www.theses.fr/2010PA112143.

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Nous commençons notre thèse par la présentation de l'état de l'art de la coordination optimale des relais de protections à maximum de courant et de protections à distance. La coordination optimale utilise les méthodes d'optimisation linéaire ou non linéaire pour déterminer les valeurs optimales de paramètres de réglage : le facteur de multiplication K, le courant de déclenchement Id et le temps de fonctionnement de la deuxième zone des relais à distance tz2. L'identification des avantages et des inconvénients de méthodes utilisées constitue l'objet de cette présentation. Les principales inconv

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Salha, Fouad. "Microréseaux îlotables : étude et coordination des protections des générateurs et du réseau." Phd thesis, Ecole Centrale de Lille, 2010. http://tel.archives-ouvertes.fr/tel-00865077.

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L'intégration des énergies renouvelables a conduit à introduire la notion d'utilisation locale de ces nouvelles sources de production. Nous pouvons définir le paradigme de microréseau comme une agrégation de plusieurs sources d'énergie distribuée qui peuvent alimenter leurs charges locales. Ces microréseaux peuvent être îlotables pour garantir la continuité de service et l'alimentation des charges. Pour assurer la fiabilité du réseau, une stratégie de protection des générateurs et du microréseau lui-même a été proposée. Dans ce mémoire, les points communs et les différences entre les générateu

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7

van, der Walt Rhyno Lambertus Reyneke. "Photovoltaic based distributed generation power system protection." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/62807.

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In recent years, the world has seen a significant growth in energy requirements. To meet this requirement and also driven by environmental issues with conventional power plants, engineers and consumers have started a growing trend in the deployment of distributed renewable power plants such as photovoltaic (PV) power plants and wind turbines. The introduction of distributed generation pose some serious issues for power system protection and control engineers. One of the major challenges are power system protection. Conventional distribution power systems take on a radial topology, with c

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8

Hammoud, Asif. "Etude des convertisseurs haute tension pour la protection et la coordination des réseaux de distribution." Lyon, INSA, 2010. http://theses.insa-lyon.fr/publication/2010ISAL0072/these.pdf.

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Les réseaux électriques sont de plus en plus interconnectés entre eux, et, en particulier, avec de nouveaux systèmes de productions locaux (les énergies renouvelables). L'acheminement vers le réseau de distribution se fera par l'intermédiaire de liaisons en courant continu. Ces liaisons peuvent améliorer le comportement des réseaux à courant alternatif en utilisant des systèmes de contrôle rapides basé sur l'électronique de puissance et la commande. D'un autre côté, le développement rapide dans le domaine d'électronique de puissance a permis d'augmenter les projets de transmission d'énergie pa

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9

Hartono, Aryudha. "Microgrid Safety and Protection Strategies." Thesis, KTH, Elektroteknisk teori och konstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226593.

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One of the challenging issues with the Microgrid is that the bidirectional power flow providedby the distributed generator (DG) which modify the fault current level. Furthermore, theinverter based-renewable energy source (IB-RES) limits the total fault current contributionto the grid due to its thermal capability. Since Microgrid should be able to operate in gridconnectedand islanded mode, protection strategies are needed to solve this challenging issue.By only having IB-RES and battery storage system, the fault condition and normaloperation cannot be distinguished. Apart from fault clearing i

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10

Xu, Ke. "INTELLIGENT METHODS FOR OPTIMUM ONLINE ADAPTIVE COORDINATION OF OVERCURRENT RELAYS." UKnowledge, 2018. https://uknowledge.uky.edu/ece_etds/127.

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During the operation in a modern power distribution system, some abnormal events may happen, such as over-voltage, faults, under-frequency and overloading, and so on. These abnormal events may cause a power outage in a distribution system or damages on the equipment in a distribution system. Hence these abnormal events should be identified and isolated by protection systems as quickly as possible to make sure we can maintain a stable and reliable distribution system to supply adequate electric power to the largest number of consumers as we can. To sum up, we need stable and reliable protection

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Barik, Tapas Kumar. "Modern Adaptive Protection and Control Techniques for Enhancing Distribution Grid Resiliency." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/103644.

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Power distribution systems have underwent a lot of significant changes in the last two decades. Wide-scale integration of Distributed Energy Resources (DERs) have made the distribution grid more resilient to abnormal conditions and severe weather induced outages. These DERs enhance the reliability of the system to bounce back from an abnormal situation rather quickly. However, the conventional notion of a radial system with unidirectional power flow does not hold true due to the addition of these DERs. Bidirectional power flow has challenged the conventional protection schemes in place. The mo

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12

Twu, Philip Y. "Control of multi-agent networks: from network design to decentralized coordination." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43713.

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This dissertation presents a suite of design tools for multi-agent systems that address three main areas: network design, decentralized controller generation, and the synthesis of decentralized control strategies by combining individual decentralized controllers. First, a new metric for quantifying heterogeneity in multi-agent systems is presented based on combining different notions of entropy, and is shown to overcome the drawbacks associated with existing diversity metrics in various scientific fields. Moreover, a new method of controlling multi-agent networks through the single-leader ne

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Blay, Ludovic. "Vers une cellule d'appui et de coordination multicommunale pour un traitement local et efficace des crises." Troyes, 2012. http://www.theses.fr/2012TROY0003.

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Plusieurs évènements majeurs et crises violentes ont frappé la France et le monde ces dernières années, mettant les acteurs locaux en première ligne pour gérer des situations complexes. De Xynthia à la pandémie grippale, les Maires ont été amenés sur le terrain des crises. A l’examen de plusieurs retours d’expérience et après des entretiens avec les acteurs locaux du traitement des crises, il s’avère que ces décideurs publics se trouvent isolés et manquent d’informations pour faire face à de telles situations. Tous les Maires ne sont pas préparés ni entraînés à la gestion d’évènements majeurs.

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Gärtner, Tanya, and Magnus Obermann. "The Role of the 'Coordinating State' in the Protection of the Underwater Cultural Heritage: An analysis of the cooperative jurisdictional regime of the UNESCO Convention for the Protection of the Underwater Cultural Heritage (2001) including relevant state practice." Beiträge des UNESCO-Lehrstuhls für Internationale Beziehungen, 2020. https://tud.qucosa.de/id/qucosa%3A70871.

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The article at hand concerns itself with evaluating the impact the State Cooperation System has had on how underwater cultural heritage is dealt with in international waters. A total of six researched cases, including the infamous Titanic and the currently controversial San José, attest that the notion of the Coordinating State has yet to deliver a higher standard of protection for cultural assets underwater. Also, generic ramifications caused by the superficial configuration of the treaty, such as disregarding private stakeholders and elements of bureaucracy, are identified. The discontent wi

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Nguyen, Kien Trung. "Etude expérimentale du comportement instable d'un sable silteux : application aux digues de protection." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4709/document.

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Les matériaux constitutifs des digues sont souvent des sables silteux dont le comportement mécanique peut manifester une « instabilité » à des états de contraintes situés bien avant la limite de plasticité de Mohr-Coulomb. Ce mécanisme de rupture pourrait expliquer plusieurs brèches dont l'occurrence n'a pas été attribuée aux mécanismes classiques de rupture de digues telle que l'érosion interne. L'objectif de cette thèse est de mieux comprendre, au regard de ce phénomène d'instabilité, le comportement mécanique d'un sable silteux provenant de la zone adjacente à une brèche de digue du Rhône l

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Borsoi, Sad Sandrini. "Coordenação de dispositivos de proteção contra surtos em baixa tensão: ênfase instalações nucleares." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-27022018-082038/.

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O trabalho apresenta uma metodologia aplicável à coordenação de dispositivos de proteção contra surtos em sistemas de corrente alternada de baixa tensão. Esta tem como base a adequação dos níveis de isolamento e imunidade dos equipamentos elétricos e eletrônicos e de energia absorvida pelos dispositivos de proteção. A principal motivação está relacionada aos critérios de segurança e confiabilidade requeridos por instalações nucleares, em que a coordenação da proteção contra surtos assume um importante papel. Uma metodologia interativa é implementada visando otimizar o processo de análise e esp

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Joachim, Claire. "Le partage des compétences en matière de protection de la qualité des eaux douces au Canada et dans l'Union européenne." Thesis, Toulouse 1, 2014. http://www.theses.fr/2014TOU10059/document.

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L'union européenne et le Canada appliquent la méthode de coordination des normes, un moyen de fonctionnement d'entités unies dans la diversité. Nous allons rechercher les raisons pour lesquelles des différences apparaissent dans l'application de la même méthode de coordination des normes dans les deux régions. Nous allons nous interroger sur les moyens mis à la disposition de la méthode de coordination des normes par le système canadien, et nous nous intéresserons au système fédéral comme moyen de coordination des législations. Nous considèrerons aussi l'espace de liberté, de sécurité et de ju

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18

Foury, Nazim Fouad. "L'effectivité des instruments de protection et d'aménagement du littoral méditerranéen : cas de l'Algérie." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0220.

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Le littoral algérien est caractérisé par une grande richesse en ressources naturelles et offre d’importantes potentialités économiques. Néanmoins, cette portion du territoire est victime de son succès et se trouve confrontée, par conséquent, à une multitude de problèmes tels que la surexploitation de ses ressources amplifiés par une urbanisation massive qui s'accélère de plus en plus mais également par une pollution et une dégradation des zones côtières. Afin de répondre au mieux aux nombreuses incohérences résultant de ces divers problèmes qui frappent le littoral algérien, l’État doit veille

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19

Silva, Kathiane Queiroz da. "Sistema de proteÃÃo adaptativa." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13929.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>This paper proposes an adaptive protection system (SPA) developed in Matlab, in order to make the smart grid for greater flexibility reliability and security of the electric power system the protection system proposed is able to assist in the study of protection by the choice of settings to be entered in the relay once the mains relays are parameterized adaptive protection is responsible for discerning between a change of setting group or send new settings this decision is taken by the SPA in the control center and sent to the gr

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Junior, Romildo de Campos Paradelo. "Proteção de sobrecorrente em sistemas de distribuição de energia elétrica através de abordagem probabilística." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-31082006-165537/.

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Este trabalho apresenta um estudo de proteção de sobrecorrente de redes primárias aéreas de distribuição de energia elétrica através de uma abordagem probabilística. Abordagens convencionais para o problema de proteção de sobrecorrente não levam em conta a natureza probabilística das principais variáveis envolvidas: tipo da falta, localização da falta e impedância de defeito para faltas envolvendo a terra. Neste caso, por exemplo, torna-se muito difícil avaliar as conseqüências de situações nas quais a coordenação total entre os dispositivos não pode ser alcançada por alguma razão. A abordagem

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21

Bernardes, Wellington Maycon Santos. "Análise da proteção de sistemas de energia elétrica utilizando técnicas modernas de otimização heurística." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-10122018-134438/.

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O estudo da proteção em sistemas elétricos de potência representa um tópico de grande relevância proporcionando continuidade do serviço e segurança da operação. Hoje, a coordenação de relés direcionais de sobrecorrente (RDSs) é realizada usando formulações matemáticas que basicamente levam em consideração o tempo de operação dos dispositivos e o atendimento ao intervalo de tempo de coordenação (ITC). Nesta tese tem sido realizada a coordenação e seletividade entre RDSs considerando a otimização simultânea das unidades temporizada e instantânea de fase e neutro, contingências em circuitos mutua

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22

Comassetto, Lorenzo. "Algoritmos heurísticos de otimização da proteção e manobra em redes de distribuição de energia." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/3657.

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The new regulations of the electricity sector have requested from the power utilities great performance efficiency on their distribution systems, requiring more rigorous quality and continuity energy levels. In Brazil, the privatization of the power utility companies has been allowing the adoption of new planning and operation policies, that necessarily consider the system reliability and its economic constraints. Regarding this the companies are looking for objectively estimate all the necessary system investments in order to achieve safe and economic continuity for its consumers. At planning

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Rocha, Clarissa Argenti. "Método de coordenação e seletividade de fusíveis e religadores para redes de distribuição de energia." Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7455.

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Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2018-12-13T12:38:00Z No. of bitstreams: 1 Clarissa Argenti Rocha_.pdf: 2812629 bytes, checksum: 71ffc1d81a1b5a7e4e8e3d80481d872b (MD5)<br>Made available in DSpace on 2018-12-13T12:38:00Z (GMT). No. of bitstreams: 1 Clarissa Argenti Rocha_.pdf: 2812629 bytes, checksum: 71ffc1d81a1b5a7e4e8e3d80481d872b (MD5) Previous issue date: 2018-08-31<br>Nenhuma<br>As redes atuais de distribuição são cada vez mais exigidas quanto a sua confiabilidade, as concessionárias precisam atender os critérios dos indicadores de qualidade individual. Para al

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Gutierres, Luiz Fernando de Freitas. "Proposta de um sistema de proteção para preservar a coordenação entre religadores e elos fusíveis de sistemas de distribuição na presença de geração distribuída." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/8529.

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This work presents a novel recloser-fuse coordination protection for distributed generation systems based on the use of RMS current comparators. In real-time, these comparators are responsible for analyzing current magnitude in upstream and downstream network directions; identify faults; and assess the recloser-fuse coordination status based on critical margins identified by the protection system. Once a miscoordination is detected, some distributed generation units are strategically disconnected from the distribution network by gate turn-off thyristors. As a result of this action, short-circu

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Ledesma, Jorge Javier Giménez. "Uma metodologia para análise da coordenação e seletividade da proteção de sistemas de distribuição." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/4101.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-19T18:21:33Z No. of bitstreams: 1 jorgejaviergimenezledesma.pdf: 1333717 bytes, checksum: c7a67b49a38e446b2cbd5a0b04c85f70 (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-20T12:30:20Z (GMT) No. of bitstreams: 1 jorgejaviergimenezledesma.pdf: 1333717 bytes, checksum: c7a67b49a38e446b2cbd5a0b04c85f70 (MD5)<br>Made available in DSpace on 2017-04-20T12:30:20Z (GMT). No. of bitstreams: 1 jorgejaviergimenezledesma.pdf: 1333717 bytes, checksum: c7a67b49a38e446b2cbd5a0b04c85f70 (MD5)

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Secco, Gustavo Prado. "Procedimento para estudo de coordenação das proteções elétricas em centrais de geração eólica." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-12072016-142252/.

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Com a busca pela sustentabilidade no abastecimento de energia elétrica, a fonte eólica tem ganhado grande destaque na matriz energética global por possuir modelo de negócio consolidado, pois conta com aerogeradores modernos, naceles instalados em alturas cada vez maiores, geradores elétricos mais potentes e com sistemas de controle altamente tecnológicos. No Brasil, a energia eólica vem sendo a grande vencedora dos leilões de energia, aumentando de forma significativa seu portfólio pela viabilidade na construção de grandes complexos que devido à elevada potência instalada, realiza seu acesso a

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Santos, Fábio Marcelino de Paula. "Algoritmo enxame de partículas evolutivo para o problema de coordenação de relés de sobrecorrente direcionais em sistemas elétricos de potência." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-26082013-103833/.

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Um sistema elétrico de potência agrega toda a estrutura pela qual a energia elétrica percorre, desde a sua geração até o seu consumo final. Nas últimas décadas observou-se um significativo aumento da demanda e, consequentemente, um aumento das interligações entre sistemas, tornando assim a operação e o controle destes extremamente complexos. Com o fim de obter a desejada operação destes sistemas, inúmeros estudos na área de Proteção de Sistemas Elétricos são realizados, pois é sabido que a interrupção desses serviços causam transtornos que podem assumir proporções desastrosas. Em sistemas elét

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Dureau, Romain. "Gestion collective d’un risque ravageur pour améliorer la résilience des systèmes fourragers. Modélisation bioéconomique de la gestion des pullulations de campagnols terrestres." Thesis, Université Clermont Auvergne‎ (2017-2020), 2020. http://www.theses.fr/2020CLFAD009.

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Depuis les années 1970, certains territoires d’élevage de moyenne montagne fortement spécialisés dans la production herbagère subissent les pullulations régulières et intenses d’un rongeur ravageur des prairies : le campagnol terrestre (Arvicola terrestris scherman). Tous les 5 à 10 ans selon les caractéristiques locales du paysage, les prairies exposées voient leur production fourragère diminuer de 50% en moyenne, déstabilisant les systèmes fourragers et occasionnant des pertes économiques significatives. Malgré les méthodes de lutte directes et indirectes proposées, la dimension collective d

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Negrão, Danilo Luiz Alves. "Metodologia para a coordenação e seletividade da proteção direcional de sobrecorrente em sistemas de transmissão de energia elétrica." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-05082015-105138/.

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Este trabalho propõe uma nova metodologia para a solução do problema de coordenação de relés direcionais de sobrecorrente em sistemas de transmissão em malha. São utilizadas informações sobre a atuação do relé como dispositivo de proteção principal (ou retaguarda local no caso de se considerar o relé de distância) e também de sua atuação como proteção de retaguarda remota, fornecendo uma base mais sólida para definição dos ajustes. A partir de uma série de critérios determinados de acordo com a instalação, define-se uma área de ajuste do relé, diretamente sobre sua curva de atuação. Sobre esta

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Soares, Antonio Helson Mineiro. "Metodologia computacional para coordenação automática de dispositivos de proteção contra sobrecorrente em sistemas elétricos industriais." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-17112009-090033/.

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Este trabalho apresenta uma metodologia computacional para coordenação automática de dispositivos de proteção contra sobrecorrente em sistemas elétricos industriais radiais, tendo como principais vantagens a exatidão nos cálculos dos ajustes e a proposição automática de soluções para eventuais problemas de coordenação, sempre que possível. A metodologia é utilizada tanto para proteção individual contra sobrecorrente dos equipamentos quanto para coordenação dos dispositivos de proteção do sistema. É feito um estudo detalhado dos requisitos de proteção de sobrecorrente dos equipamentos empregado

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Niang, Mouhamadou Lamine. "Le droit de la sécurité sociale des Etats membres de l'Union Economique Monétaire Ouest Africaine, au regard des normes de l'Organisation Internationale du Travail : étude de droit comparé." Thesis, Montpellier 1, 2010. http://www.theses.fr/2010MON10005.

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La compensation de l'absence ou de la réduction du revenu du travail résultant des risques sociaux auxquels sont exposés les membres de la communauté des Etats UEMOA connaît des limites. Par rapport aux normes de l'Organisation Internationale du Travail, les régimes de sécurité sociale qui s'inspirent de l'ensemble des dispositions législatives, réglementaires et conventionnelles destinées à l'exclusion du chômage à protéger l'individu, sont calqués sur le modèle européen. Le système de sécurité sociale lié au développement du salariat étant le fondement de la norme minima. La convention n°102

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Reich-Bonnafous, Emmanuelle. "Etude et limites de la prestation spécifique dépendance pour les personnes âgées. Prise en charge complémentaire possible à l'aide d'une association de coordination en dordogne." Bordeaux 2, 1999. http://www.theses.fr/1999BOR2M133.

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Resende, Diogo Soares. "Ferramenta trifásica para síntese e análise da proteção em sistemas desequilibrados." Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/3134.

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Ozakturk, Meliksah. "Power electronic systems design co-ordination for doubly-fed induction generator wind turbines." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/power-electronic-systems-design-coordination-for-doublyfed-induction-generator-wind-turbines(ebe4de00-07ad-4b06-8b8d-79be291804e7).html.

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Wind turbine modelling using doubly-fed induction generators is a well-known subject. However, studies have tended to focus on optimising the components of the system rather than considering the interaction between the components. This research examines the interaction of the control methods for a doubly-fed induction generator (DFIG) in a wind turbine application integrating them with the crowbar protection control and DC-link brake control to make the best use of the converter. The controls of the rotor-side and the grid-side converters of the DFIG model are both well established and have be

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Guarda, Fernando Guilherme Kaehler. "Metodologia híbrida para alocação, coordenação, dimensionamento e adequação do sistema de proteção em sistemas de distribuição de energia elétrica com geração distribuída diretamente acoplada." Universidade Federal de Santa Maria, 2017. http://repositorio.ufsm.br/handle/1/12186.

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This work aims to allocate, size and coordinate protective devices in electric power systems with directly coupled distributed generation and also to adequate protection systems to accommodate these sources. Currently, it is possible to observe distributed generation penetration growth in distribution systems, being encouraged by new laws and implementation costs reduction, the last one due to technological maturity. Dispersed generation brings several benefits in electric networks operation such as: reduction of technical losses, voltage profiles maintenance, increase in energy quality, etc.

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Latzo, Curtis Thomas. "Approaches to Arc Flash Hazard Mitigation in 600 Volt Power Systems." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3198.

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ABSTRACT Federal regulations have recognized that arc flash hazards are a critical source of potential injury. As a consequence, in order to work on some electrical equipment, the energy source must be completely shut-down. However, power distribution systems in mission critical facilities such as hospitals and data centers must sometimes remain energized while being maintained. In recent years the Arc Flash Hazard Analysis has emerged as a power system tool that informs the qualified technician of the incident energy at the equipment to be maintained and recommends the proper protective equip

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Šoustal, Petr. "Ochrany venkovních vedení vn a jejich koordinace s automatizovanými úsečníky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217819.

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The aim of this Master’s Thesis is to describe protections for overhead lines in distribution networks. Here are described requirements for the protection and the basic protections. Protections are divided according to their protective function. For each protection is given its use and its power plans. It is stated in the work setting of protection in the real network. On this network is simulated place with short-circuit and described the action of protection. The work also deals with the coordination of protection with automatic circuit breakers. This chapter shows that, given the selectivit

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Bottura, Fernando Bambozzi. "Algoritmo de otimização híbrido para a coordenação de relés direcionais de sobrecorrente em um sistema elétrico malhado." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-07032014-143038/.

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Esta pesquisa tem como objetivo apresentar um método para a coordenação dos Relés Direcionais de Sobrecorrente (RDS) associados ao sistema de proteção de um Sistema Elétrico de Potência (SEP) malhado. O SEP malhado, referente a uma parte do sistema de subtransmissão da rede básica brasileira, em concessão da Companhia de Transmissão de Energia Elétrica Paulista (CTEEP), foi simulado via o software CAPE (Computer-Aided Protection Engineering) a partir da base de dados, para estudos de curtos-circuitos, disponibilizada pelo Operador Nacional do Sistema (ONS). Dada a topologia e a operação do SEP

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Harvey, Tasha. "Selective coordination for overcurrent protective devices: applications for buildings in the United States." Kansas State University, 2012. http://hdl.handle.net/2097/13327.

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Master of Science<br>Department of Electrical and Computer Engineering<br>Medhat M. Morcos<br>The inclusion of Selective Coordination in the NEC since the 2002 revision and the expansion of applications for which coordination of Over-current Protective Devices is required have resulted changes in design approaches for electrical engineers. In order to meet the requirements of the NEC regarding Selective Coordination for secondary power systems within buildings, often, upstream protective devices need to be held-in to a short-circuit condition, thus increasing the Arc Flash Energy. Electrical

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Mohammadi, Houshang C. "Short-circuit current calculations and protective relay coordination for industrial and commercial power systems." Ohio : Ohio University, 1986. http://www.ohiolink.edu/etd/view.cgi?ohiou1183141301.

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Mohammadi, Houshang. "Short-circuit current calculations and protective relay coordination for industrial and commercial power systems." Ohio University / OhioLINK, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183141301.

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42

Cesar, Eduardo Lenz. "Sistemas inteligentes aplicados à coordenação da proteção de sistemas elétricos industriais com relés digitais." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=8023.

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Atualmente existem diferentes ferramentas computacionais para auxílio nos estudos de coordenação da proteção, que permitem traçar as curvas dos relés, de acordo com os parâmetros escolhidos pelos projetistas. Entretanto, o processo de escolha das curvas consideradas aceitáveis, com um elevado número de possibilidades e variáveis envolvidas, além de complexo, requer simplificações e iterações do tipo tentativa e erro. Neste processo, são fatores fundamentais tanto a experiência e o conhecimento do especialista, quanto um árduo trabalho, sendo que a coordenação da proteção é qualificada pela IEE

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Bernardes, Wellington Maycon Santos. "Algoritmo enxame de partículas discreto para coordenação de relés direcionais de sobrecorrente em sistemas elétricos de potência." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-14052013-094113/.

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Este trabalho propõe uma metodologia baseada em técnicas inteligentes capaz de fornecer uma coordenação otimizada de relés direcionais de sobrecorrente instalados em sistemas de energia elétrica. O problema é modelado como um caso de programação não linear inteira mista, em que os relés permitem ajustes discretizados de múltiplos de tempo e/ou múltiplos de corrente. A solução do problema de otimização correspondente é obtida através de uma metaheurística nomeada como Discrete Particle Swarm Optimization. Na literatura técnico-científica esse problema geralmente é linearizado e aplicam-se arred

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Moro, Vinícius de Cillo. "Metodologia para coordenação otimizada entre relés de distância e direcionais de sobrecorrente em sistemas de transmissão de energia elétrica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-30102014-093627/.

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A proteção de sistemas de energia elétrica possui papel extremamente importante no aspecto de garantir o fornecimento de energia de maneira segura e confiável. Assim, a ação indevida ou a não atuação deste sistema de proteção pode causar danos materiais ou econômicos tanto para as concessionárias quanto para os consumidores de energia elétrica. Dessa forma, o sistema de proteção deve estar bem ajustado para que possa garantir suas funções, sendo sensível, seletivo, confiável e rápido. Para tanto, uma boa coordenação entre os relés de proteção deve ser estabelecida. No caso de um sistema de tra

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Wagner, Cory J. "OUTREACH COORDINATOR FOR THE UNREGULATED CONTAMINANT MONITORING REGULATION: AN INTERNSHIP WITH THE UNITED STATES ENVIRONMENTAL PROTECTION AGENCY." Miami University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1073403309.

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Tsung-Lo, Wen, and 羅文聰. "Protection Coordination of MicroGrid." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/vs87w5.

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碩士<br>中原大學<br>電機工程研究所<br>98<br>The design of Microgrid is different from the design of a traditional power system. Microgrid adopts a combination of various reliably renewable resources to provide power energy and uses distributed control to meet varied demands. It is quite different from the one as in central control that is utilized in the traditional power system. Microgrid is a revolutionary concept and new vision for power system development. The loads in a Microgrid, other than the power transmitted from a power utility, they can also be power supplied from a distributed generator locate

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Ganjavi, Mohammad Reza. "Protection system coordination using expert system /." 2008. http://diglib.uni-magdeburg.de/Dissertationen/2008/mohganjavi.htm.

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Yang, Wen-Chi, and 楊文奇. "Simulation of Insulation Coordination and Protection Coordination for 22.8kV Overhead Line." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/j37e43.

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碩士<br>中原大學<br>電機工程研究所<br>102<br>The thesis aims at the analysis of insulation coordination and protection coordination for 22.8kV overhead line in Taiwan. The voltages of distribution feeders used in Taiwan are divided into 22.8kV and 11.4kV levels, while the installations are divided into overhead and underground power distribution which 22.8kV voltage level is only implemented on underground distribution lines. To improve the power supply capacity, to reduce line losses and to simplify the voltage level, Taiwan Power Company intends to increase the distribution feeder voltage rating from 11.

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LYU, MENG-CANG, and 呂孟倉. "Investigation of the automation of protection coordination." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/43662712085303391045.

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Huang, Jyun-jhih, and 黃俊智. "Implementation of Intelligent Outlet with Protection Coordination." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/92989616518863099431.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>101<br>As facing the crisis of intensely use of energy, we not only need to find the renewable energy but also need to develop energy management equipment to expect that it can inhibit the rapid depletion of the energy by using through the technologies and policies. For this reason, this thesis develops an intelligent outlet with power measurement and wireless communication for energy management. It can get the power parameters immediately by using the outlet for load monitoring. User can observe the situation and status of the usage via the ZigBee wireless communica

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