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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Inteligentní elektronické zařízení REF615 / Feeder Protection Relay REF615

Holomek, David January 2015 (has links)
The main objective of this thesis is to create a monitoring system for an asynchronous motor using IED REF615. For REF615 devices it is necessary to make the appropriate configuration and connection.The device communicate with the MVI69-MNET card by Modbus/TCP protocol. The thesis describes the operation of an asynchronous motor through the use of a PowerFlex 40 frequency changer. PowerFlex 40 sends data via an Ethernet/IP connection. The thesis also describes a program in PLC for monitoring the power status of an asynchronous motor. The next part of my work is a visualization created in the FactoryTalk View Studio. In conclusion, the thesis is tested by connecting all of the components as well as all of the proposed functions.
32

Framtagning av teknisk specifikation för upphandling av kontrollanläggningar för Uddevalla Energi EInät AB

Glans, Jesper January 2013 (has links)
No description available.
33

Framing The Post-9/11 service member: How American newspapers frame the post-9/11 service member, ten years later

Fong, Laura C. 12 August 2013 (has links)
No description available.
34

Automatización de una Subestación Eléctrica utilizando el Protocolo IEC 61850 y el ICCP para el envio de Datos

Toscano Palacios, Marco Antonio January 2010 (has links)
This thesis report, focuses on the automation process of Electrical Substations, with the main objective of integration into SCADA systems for electrical equipment responsible for the operation within substations, these devices have different communication protocols, after concentration information substation SCADA system, the next step to realize is sending data to the regulatory body that is in a remote location away from the substation, this is achieved using communication protocols designed for this function. All this process requires an optimization for the response times to any event that may happen in the substations and with this an optimization in operation of generation, distribution and transformation of electrical energy
35

Competição tributária internacional por investimentos estrangeiros diretos – IED: o posicionamento do brasil frente às recomendações da ocde para evitar práticas abusivas

D’ávila, Lucimara dos Santos 16 June 2016 (has links)
Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2016-09-27T12:28:46Z No. of bitstreams: 1 Lucimara dos Santos D_ávila.pdf: 887905 bytes, checksum: 99d2f256a2675268c4293efad678f69c (MD5) / Made available in DSpace on 2016-09-27T12:28:46Z (GMT). No. of bitstreams: 1 Lucimara dos Santos D_ávila.pdf: 887905 bytes, checksum: 99d2f256a2675268c4293efad678f69c (MD5) Previous issue date: 2016-06-16 / The purpose of this research is to develop a theoretical material, dealing with the new directions of the international tax policy, in the post-World War II period and after the establishment of the OECD, specifically about the control of tax competition. Aiming to create common interests between countries and thus avoid new conflicts, the OECD stimulated the free international capital flows, including foreign direct investment – FDI. The OECD, however, in order to avoid abusive practices of international tax competition for FDI funding, has instituted since 1998, policies and recommendations suggesting a policy of greater transparency and exchange of tax information between countries. In this scenario, although Brazil is not an OECD member, but a relevant foreign investment recipient, is gradually adapting its tax legislation, seeking to adapt to the best tax practices recommended by the OECD, however there are still many challenges to be faced, as we shall see in this study. This thesis, the final product of this research, intends to be an essentially informative material, but that brings to its readers an objective view of the need for greater fiscal transparency and the adoption of best tax practices recommended by the OECD, towards a fairer tax competition among countries. It is also analyzed the tax legal changes that have occurred in Brazil as part of this global phenomenon, reflecting the specific nature of our reality. The concepts used in the research were subsidized by surveys on secondary sources, including literature, based on books, journals, dissertations or theses presented at universities, sites about these concepts, in addition to the researcher learning in the Doctorate courses / O objetivo desta pesquisa é elaborar um material teórico versando sobre os novos rumos da política tributária internacional, no período pós-Segunda Guerra Mundial e após a constituição da OCDE, especificamente quanto ao controle da competição tributária. Visando criar interesses comuns entre os países e, assim, evitar novos conflitos, houve o estímulo, pela OCDE, para o livre fluxo internacional de capitais, incluindo os investimentos estrangeiros diretos – IED. A OCDE, no entanto, com o objetivo de evitar práticas abusivas de competição tributária internacional para captação de IED, vem instituindo, desde 1998, recomendações sugerindo uma política de maior transparência e troca de informações tributárias entre os países. O Brasil, neste cenário, ainda que não membro da OCDE, mas receptor de relevantes investimentos estrangeiros, vem adequando paulatinamente sua legislação tributária, procurando adaptar-se às melhores práticas tributárias recomendadas pela OCDE, porém ainda com muitos desafios a serem enfrentados, como veremos neste estudo. Tal tese, produto final desta pesquisa, pretende constituir-se em um material essencialmente informativo, mas que traga a seus leitores uma visão objetiva acerca da necessidade de maior transparência fiscal e da adoção das melhores práticas tributárias recomendadas pela OCDE, em busca de uma competição tributária mais justa entre os países. Procura-se, também, posicionar as mudanças legislativas tributárias que têm ocorrido no Brasil como parte desse fenômeno global, refletindo as especificidades inerentes à nossa realidade. Os conceitos utilizados na pesquisa foram subsidiados por levantamentos em fontes secundárias, incluindo o levantamento bibliográfico baseado em livros, revistas especializadas, dissertações ou teses apresentadas em universidades, sites sobre esses conceitos, além do aprendizado da pesquisadora nas disciplinas do Doutorado
36

Klorgasbomber i Afghanistan : En jämförande fallstudie om hot och konsekvenser för svenska enheter i Afghanistan

Gunnvall, Björn January 2012 (has links)
Från oktober 2006 till juni 2007 genomfördes en rad attacker i Irak där man använde bilbomber lastade med klorgasbehållare. Hundratals människor exponerades för gasen och attackerna fick stora konsekvenser för koalitionens agerande. Denna uppsats granskar attackerna för att analysera de krav som ställdes på aktören som genomförde dem. Därefter appliceras kraven på den motståndare som Sveriges insats i Afghanistan möter för att belysa hotbilden för svenska enheter att bli utsatta för en liknande attack. Vidare beskrivs de konsekvenser som hotbilden får för insatsen. Resultatet av undersökningen visar att motståndaren i Afghanistan skulle kunna genomföra en klorgasattack om denne uppfyller vissa kriterier som rimligen skulle kunna uppfyllas. Konsekvenserna för den svenska insatsen är att man, om möjligt, bör undersöka motståndarens kvalitativa kapacitet kopplat mot klorgasens användande, övervaka flödet av klorgas i sitt operationsområde samt öva grundläggande soldatfärdigheter för självskydd.
37

Automatizace rozvodny VN s využitím řídicího systému COM600 a standardu IEC61850 / Medium voltage substation automation using control system COM600 and standard IEC61850

Havelka, Tomáš January 2016 (has links)
This work deals with problematic of standard IEC61850, mainly with chapter IEC 61850-9-2 LE which is commonly known as Process bus communication. There are described advanced tools of the control system COM600 with detail description of their configuration in this work. It also deals with configuration of IEC 61850-9-2 LE with Relion family protection relays and its implementation to the control system COM600. The main aim of this work is focused on configuration of IEC 61850-9-2 standard with protection relays, configuration and detail description of COM600 advanced tools, description of Logic processor, further custom design and appliaction configuration global reset of Logic procesor in control system COM600.
38

Microgrid Safety and Protection Strategies

Hartono, Aryudha January 2018 (has links)
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 issue, there is a consideration tostudy the fault isolation in the Microgrid under the limited fault current provided by IB-RES.To have fault isolation capability, the intelligent electrical device (IED) is needed. The firststep is to find a method that can detect a fault under the fault level modification constraint.This thesis presents a zero and negative sequence current protection to detect a fault.However, to make it selective, this protection will be applied directionally. It is common thatthe distribution grid has unbalanced load operation, thus providing zero and negativesequence component in the grid. To apply the directional zero and negative sequence currentprotection, the unbalanced load flow is simulated to distinguish the fault and normaloperation under unbalanced load condition.Safety and regulation are discussed briefly in this thesis. It is important that each of theIB-RES has fault ride-through (FRT) capability that follows a regulation. However, thisregulation is expected to have a coordination with the proposed protection in the Microgridso the reliability, selectivity, and sensitivity can be achieved in grid-connected and islandedmode. This thesis shows the coordination between fuses, IED, and inverter FRT capability.After providing a protection strategy, the adaptability of the proposed protection isassessed regarding of Microgrid expansion. The result shows that by applying the schemeand following the grading margin requirement that is presented in this thesis, the Microgridexpansion will not disrupt the proposed protection coordination. Since it is known that thedistribution grid is expanding its load capacity and microgeneration in continuous basis, it isconvenient that the proposed protection in the IED is expected to be adaptable, means that ithas a fixed IED setting when the grid is expanded. The analysis is performed by electrical transient analysis program (ETAP) and MatlabSimulink. The short circuit analysis, sequence-of-operation, and unbalanced load flow aresimulated by ETAP, while the protection stability is simulated by Matlab Simulink. / Ett problem som finns med microgrid är att de distribuerade produktionsgeneratorerna harett dubbelriktat effektflöde som modifierar felströmmen. Dessutom, inverterbaseradeförnyelsebara energikällor (IB-RES) begränsar det totala felströmsbidraget på grund av desstermiska kapacitet. Eftersom microgrids ska vara operativ vid både anslutning till externt nätsamt önätsdrift behövs skyddsstrategier för att kunna hantera fel, speciellt vid önätsdrift.Om endast IB-RES och batterilager används kan feldrift och normal drift inte särskiljas.Bortsätt från felhantering är det viktigt att studera felbortkoppling för microgrid underbegränsad felström som fås av IB-RES. För att kunna åstadkomma felbortkoppling behöveren IED (från engelskans Intelligent Electronic Device). Det första steget är att finna en metodför att kunna detektera fel under fel nivå modifiering. Denna avhandling tittar på att användanoll- och minusföljds ström sekvensskydd för att detektera fel. För att göra skyddet selektivtkommer det att titta på riktningen av effektflödet. I distributionsnät är det vanligt att haobalanserade laster vilket medför noll- och negativa sekvenskomponenter i nätet. För atttillämpa riktningsskydd för noll och negativ sekvens ström simuleras ett obalanserateffektflöde för att särskilja på feldrift och normal drift vid obalanserad last.Säkerhet och förordningar diskuteras kortfattat i denna avhandling. Det är viktigt att varjeIB-RES har en feltålighet som följer vissa förordningar. Denna förordning förväntassamordna det föreslagna skyddet i micronåt så att pålitlighet, selektivitet och känslighet kanåstadkommas vid nätanslutning och önätsdrift. Denna avhandling visar samordningen mellansäkringar, IED och feltåligheten för växelomriktare.Anpassningsförmågan för det föreslagna skyddet bedöms med avseende på expansion avmicrogrid. Resultatet visar att en expansion av ett microgrid inte kommer att störa denföreslagna samordningen om skyddsmetoden och tidsfördröjningskravet som presenteras idenna avhandling följs. Eftersom det är känt att distributionsnätet kommer att fortsätta ökasin lastkapacitet och mikrogenerering, är det lämpligt att skyddet förväntas varaanpassningsbart vilket innebär att det har en fast IED inställning när nätet expanderas.Analysen genomförs med mjukvarorna electrical transient analysis program (ETAP) ochMatlab Simulink. Kortslutningsanalysen, arbetssekvensen och obalanserad lastflödesimuleras av ETAP, medan skyddsstabiliteten simuleras av Matlab Simulink.
39

Estratégias de atração de investimentos estrangeiros diretos para o Brasil 2003 - 2013 / Strategies to attract foreign direct investment to Brazil 2003 - 2013

Farias, Carla Goreth Araújo da Silva 05 February 2015 (has links)
Submitted by Elesbão Santiago Neto (neto10uepb@cche.uepb.edu.br) on 2018-07-17T13:17:40Z No. of bitstreams: 1 PDF - Carla Goreth Araújo da Silva Farias.pdf: 30640486 bytes, checksum: 7d7ac554db0c19b8c1db8fd68fa52529 (MD5) / Made available in DSpace on 2018-07-17T13:17:40Z (GMT). No. of bitstreams: 1 PDF - Carla Goreth Araújo da Silva Farias.pdf: 30640486 bytes, checksum: 7d7ac554db0c19b8c1db8fd68fa52529 (MD5) Previous issue date: 2015-02-05 / CAPES / The research paper aims to analyze the strategies of Brazil that contribute to the attraction of Foreign Direct Investment to Brazil in the period 2003-2013. As such, a contextualization of worldwide investment flows was made, highlighting the participation of Brazil, and emphasizing the flows designated for Brazil. Subsequently, an analysis of the sectorial destinations of these investments was made, underscoring its effects on the Brazilian economy. Previously, the strategies for attracting investments were studied, with an analysis of the direct and indirect effects that contribute favorably to the attraction of cash flow to the country. The analysis was conducted by a qualitative survey i.e. an exploratory analysis of the data, using bibliographic reference, website researches and official documents provided by the Brazilian Government. It was noted that the Government remained committed to attracting foreign investment, implementing and innovating in the development of strategies to attract productive capital, with a view mainly to ensure innovative production processes for the country. It was found that the Federal Government in the period 2003-2013 demonstrated deliberate actions in order to attract FDI. / A pesquisa tem como objetivo analisar as estratégias brasileiras que contribuem para atração dos Investimentos Estrangeiros Diretos para o Brasil no período 2003-2013. Para tanto, foi realizado uma contextualização dos fluxos mundiais de investimento, destacando a participação brasileira, enfatizando a evolução desses fluxos para o Brasil. Em seguida, fez-se uma análise acerca do destino setorial desses investimentos, ressaltando os efeitos sobre a economia brasileira. Posteriormente, foram estudadas as estratégias de atração de investimentos, com análise dos efeitos diretos e indiretos que contribuem favoravelmente na atração dos fluxos para o país. A análise foi realizada a partir de levantamento qualitativo, ou seja, análise exploratória dos dados, utilizando-se de consulta bibliográfica e pesquisas aos portais e documentos oficiais disponibilizados pelo governo brasileiro. Ficou constatado que o Governo se manteve empenhado na atração de investimentos estrangeiros, aplicando e inovando na elaboração de estratégias destinadas a atrair os capitais produtivos, tendo em vista principalmente assegurar processos produtivos inovadores para o país. Verificou-se que o Governo Federal no período 2003-2013 pôs em prática ações deliberadas com o objetivo de atrair IED..,
40

UHF-SAR and LIDAR Complementary Sensor Fusion for Unexploded Buried Munitions Detection

Depoy, Randy S., Jr. January 2012 (has links)
No description available.

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