Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-10-13T13:21:48Z No. of bitstreams: 2 Dissertação - Cássio Landim Ribeiro - 2017.pdf: 3929731 bytes, checksum: 438916584696fc0815c232bacc624152 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-10-13T13:22:21Z (GMT) No. of bitstreams: 2 Dissertação - Cássio Landim Ribeiro - 2017.pdf: 3929731 bytes, checksum: 438916584696fc0815c232bacc624152 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-10-13T13:22:21Z (GMT). No. of bitstreams: 2 Dissertação - Cássio Landim Ribeiro - 2017.pdf: 3929731 bytes, checksum: 438916584696fc0815c232bacc624152 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-09-29 / This paper presents a new methodology aimed at increasing efficiency in the dimensioning and approval stage of aerial rural electricity distribution lines projects. As a substitute for the sequential process currently employed, the approach proposed here is based on Simultaneous Engineering, where all the actors of the process have access to the computational tool, in a web platform, that allows implementing the methodology, enabling the multidisciplinary activity to be carried out in a parallel way. The estimates gathered indicate that the tool will allow the reduction of the time spent for the elaboration and approval of the projects, allowing: to reduce the total cost in man-hour spent by the electric utility; satisfy the customer's needs more quickly; optimize the mechanical dimensioning of distribution lines; and provide additional financial gain to the concessionaire due to the reduction of the average time to effectively start supplying electric power. / Neste trabalho, é apresentada uma nova metodologia dirigida ao aumento da eficiência nas etapas de dimensionamento e de aprovação de projetos de linhas rurais aéreas de distribuição de energia elétrica. Em substituição ao processo sequencial atualmente empregado, a abordagem proposta aqui é baseada em Engenharia Simultânea, onde todos os atores do processo têm acesso à ferramenta computacional, em plataforma web, que permite implementar a metodologia, possibilitando realizar a atividade multidisciplinar, em paralelo, de maneira mais ágil. As estimativas realizadas indicam que a ferramenta possibilitará a redução do tempo gasto para a elaboração e aprovação dos projetos, permitindo: reduzir o custo total em homem-hora despendido pela concessionária de energia elétrica; satisfazer a necessidade do cliente de maneira mais rápida; otimizar os dimensionamentos mecânicos das linhas de distribuição; e prover ganho financeiro adicional à concessionária devido à redução do tempo médio para efetivamente iniciar o fornecimento da energia elétrica.

The loss of senior expertise in power line design poses a critical challenge to the sustainable energy transition. Current methods of knowledge transfer fail to prevent the loss of invaluable knowledge necessary for future junior power line designers. Additionally, the rise of informal deployment of generative language models may also threaten to bury hand-written knowledge documents before this knowledge can be extracted, structured, and preserved for future guidance. This thesis proposes a framework where large language models are integrated into knowledge transfer and decision-making guidance for an engineering enterprise. Using this framework, this thesis further explores how data-driven knowledge tools can assist junior design engineers by supporting information retrieval and directing to knowledge sources. The ability of a large language model to retrieve relevant knowledge from an engineering design document was validated by comparing the process of human designers manually completing a similar task. In this evaluation involving six participants and the large language model, responses to questions on mechanical dimensioning of stays for utility poles were ranked by experts. The results showed that the large language model responses were ranked similarly to the junior designers on average. Additionally, a small-scale demonstrative knowledge tool, insights from interviews, literature studies as well as the results from the validation study lead to the conclusion that large language models can assist power line designers via a knowledge tool. Beyond power line design, this thesis contributes to the understanding of how data-driven language models can assist knowledge retrieval and decision-making across other engineering design domains. This work utilizes a professional education document on the mechanical dimensioning of wooden power line poles including an analysis on the wind and weight span’s affect on the dimension of the pole, developed parallel to this work. The original design data from the document supported the tests conducted in this thesis. The professional education document on the mechanical dimensioning of wooden power line poles was developed in parallel to this thesis as a case study supporting the tests with original design data on power line design knowledge. The work also discusses risks and ethical aspects when implementing such a knowledge tool. Risks such as leakage of classified information are emphasized and need comprehensive systems and methods to be avoided. It is therefore highlighted how important it is to carry out the project with care and expertise to avoid damage to companies and society. Local language models or highly trusted AI system providers are recommended to ensure that no sensitive information is leaked to an unwanted third-party. With a high degree of caution and consideration of risks, an effective knowledge tool can contribute to increased efficiency, faster and more sustainable development of power line infrastructure, and thus an faster energy transition. / Förlusten av senior expertis inom kraftledningskonstruktion utgör en kritisk utmaning för den hållbara energiomställningen. Nuvarande metoder för kunskapsöverföring är otillräcklig för att förhindra förlusten av ovärderlig kunskap som är nödvändig för framtida juniora kraftledningsprojektörer. Dessutom kan den ökade informella användingen av generativa språkmodeller hota att begrava mänskligt skrivna kunskapsdokument. Detta arbete presenterar ett ramverk d¨ar storskaliga språkmodeller används för att underlätta kunskapsöverföring och tillhandahålla vägledning vid beslutsfattande inom ingenjörsföretag. Med hjälp av detta ramverk utforskar arbetet ytterligare hur datadrivna kunskapsverktyg kan hjälpa juniora kraftledningskonstrukt¨orer genom att stödja informationsinhämtning med hänvisning till kunskapskällorna. En storskalig språkmodells förmåga att hämta relevant kunskap från ett tekniskt designdokument validerades genom att jämföra processen för mänskliga designers som manuellt slutförde en liknande uppgift. I denna utv¨ardering, som involverade sex deltagare och den storskaliga spr˚akmodellen, rankades svaren på frågor om mekanisk dimensionering av stag för kraftledningsstolpar av experter. Resultaten visade att den storskaliga språkmodellens svar i genomsnitt rankades på liknade nivå som de juniora ingenjörerna. Tillsammans med  ett småskaligt demonstrativt kunskapsverktyg, insikter från intervjuer med kraftledningskonstruktörer, litteraturstudier samt resultat från valideringsstudien dras slutsatsen att storskaliga språkmodeller kan stödja kraftledningskonstruktörer via ett kunskapsverktyg. Utöver kraftledningskonstruktion bidrar detta arbete till förståelsen av hur datadrivna språkmodeller kan hjälpa till med kunskapsinhämtning och beslutsfattande  inom andra tekniska designområden. Arbetet använder ett professionellt utbildningsunderlag om mekanisk dimensionering av kraftledningsstolpar i träkonstruktion, inklusive en analys av vertikala- och horistontella linspannets påverkan på stolpens dimension, utvecklat parallellt med detta arbete. Orginaldesigndata från underlaget stödde de tester som genomfördes. Arbetet belyser även risker och etiska aspekter vid implementering av ett sådant kunskapsverktyg. Risker som läckage av sekretessbelagd information betonas, och omfattande system och metoder behövs för att undvika dem. Därför understryks hur viktigt det är att genomföra liknande projekt med noggrannhet, försiktighet och expertis för att undvika skador på företag och samhälle. Lokala språkmodeller eller API-leverantörer med högt förtroende rekommenderas för att minimera risken att känslig information läcker ut till en oönskad tredje part. Med stor försiktighet och hänsyn till riskerna kan ett effektivt kunskapsverktyg bidra till ökad effektivitet, snabbare och mer hållbar utveckling av kraftledningsinfrastruktur, och därmed en snabbare energiomställning.

Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2017-11-17T16:18:59Z No. of bitstreams: 2 Dissertação - Denner Monteiro de Carvalho - 2017.pdf: 49512193 bytes, checksum: dce0c13146977219335b29250e4960d7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-11-20T10:11:34Z (GMT) No. of bitstreams: 2 Dissertação - Denner Monteiro de Carvalho - 2017.pdf: 49512193 bytes, checksum: dce0c13146977219335b29250e4960d7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-11-20T10:11:34Z (GMT). No. of bitstreams: 2 Dissertação - Denner Monteiro de Carvalho - 2017.pdf: 49512193 bytes, checksum: dce0c13146977219335b29250e4960d7 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-09-28 / The present work presents the development of a computational tool for the optimization of processes in the elaboration of electromechanical projects of conventional electricity distribution networks. The current process of elaboration of distribution network projects that has significant topographical interferences is slow and depends on software with a technological lag that requires post processing of the data to generate the final project, besides demanding specific technical knowledge and too much elaboration time. This elaboration time, as well as the errors occurred in the post-processing stage, hinder the approval process of the projects in the electric power concessionaires, and delay the connection of final consumers. For modeling the process, the typologies of the terrain where the network path is to be determined through surveys of the topographic data are verified first. Afterwards, mechanical forces and stresses are observed in each type of electromechanical structure, defining the minimum mounting distances in compliance with related technical norms, as well as incident variables such as wind speed and mechanical variations of the conductors during the operation. The modeling of the decision variables is applied a recursive heuristic method with the application of the Hill Climbing optimization method, which sweeps the entire line defined by topography, performing the mechanical evaluations and calculations with the optimization of technical budget criteria, generating uniform solutions and Automated. The tool obtained is developed in Web platform with friendly interface and updated, and can be used through any browser. The software, besides providing the elaboration of the project with embedded normative criteria, can be easily used for project analysis, providing integrated visualization of the planialtimetric profiles through Google Maps, optimizing the process of visual evaluation. / O presente trabalho apresenta o desenvolvimento de um método computacional destinado à otimização de processos na elaboração de projetos eletromecânicos de redes de distribuição convencional de energia elétrica. O processo atual de elaboração de projetos de redes de distribuição que possui interferências topográficas é lento e depende de softwares com defasagem tecnológica que necessitam de pós processamento dos dados para gerar o projeto final, além de demandar conhecimento técnico específico e demasiado tempo de elaboração. Esse tempo de elaboração, bem como os erros ocorridos na etapa de pós processamento, dificultam o processo de aprovação dos projetos nas concessionárias de energia elétrica, e atrasam a ligação dos consumidores finais. Para modelagem do processo, são verificados primeiramente as tipologias do terreno onde se deseja definir o caminhamento da rede através de levantamentos dos dados topográficos. Após, são observados os esforços e solicitações mecânicas pontualmente em cada tipo de estrutura eletromecânica, definindo as distâncias mínimas de montagem em observância às normas técnicas relacionadas, e também, variáveis incidentes como a velocidade do vento e variações mecânicas dos condutores durante a operação. Realizada a modelagem das variáveis de decisão é aplicado um método heurístico recursivo com a aplicação do método de otimização Hill Climbing, que varre toda a linha definida pela topografia, realizando as avaliações e cálculos mecânicos com a otimização de critérios técnicos orçamentários, gerando soluções uniformizadas e automatizadas. O método computacional é desenvolvido em plataforma Web com interface amigável e atualizada, podendo ser utilizada através de um navegador qualquer. O software além de proporcionar a elaboração do projeto com critérios normativos embutidos, pode ser facilmente utilizada para análise de projetos, proporcionando visualização integrada dos perfis planialtimétricos através Google Maps, otimizando o processo de avaliação visual.

The first part of this paper presents general information about electromagnetic designing of an induction motor. Focus is on explanation of individual designing aspects and their effects on final motor parametres. Design principles for magnetic cores, slot dimensioning, stator winding and rotor squirrel cage are presented. Second chapter presents complete analytical computation of a given induction motor. Firstly several parametres need to be selected. Then sizing of stator and rotor is conducted. Secondly steady state equivalent parametres and related operating characteristics are computed. Following chapter consinsts of three final designs. In the last chapter results of mechanical analysis are presented.