Protection Coordination
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. On common agency with informed principals
This thesis consists of three chapters that have as unifying subject the frame-work of common agency with informed principals. The first two chapters analyze the economic effects of privately informed lobbying applied to tariff protection (Chapter 1) and to customs unions agreements (Chapter 2). The third chapter investigates the choice of retailing struture
Publicado em: 01/12/2009
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14. Computational method for automatic overcurrent coordination of protection devices in industrial electrical systems / Metodologia computacional para coordenação automática de dispositivos de proteção contra sobrecorrente em sistemas elétricos industriais
This work presents a computational methodology for automatic overcurrent coordination of protection devices in radial industrial electrical systems, which main advantages are the accuracy in the devicessettings calculation and the automatic proposition of solutions to coordination problems, whenever it is possible. The methodology is used both for equipment
Publicado em: 2009
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15. ELECTRIC DISTRIBUTION POWER SYSTEMS RELIABILITY OPTIMIZATION: An Approach Considering the Selection and Allocation of Protection and Switching Devices / OTIMIZAÇÃO DA CONFIABILIDADE DE SISTEMAS DE DISTRIBUIÇÃO DE ENERGIA ELÉTRICA: Uma Abordagem Considerando a Seleção e Alocação de Dispositivos de Proteção e Manobras
One of the main goals of the electric utilities is to provide energy to its customers in a reliable and low cost way. Traditionally, the electricity sector regulatory commissions impose continuity targets, which must be carried out, to avoid great penalties. For many years, the electric utilities have adopted the practice of allowing the increment of tempora
Publicado em: 2009
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16. ALGORITMOS HEURÍSTICOS DE OTIMIZAÇÃO DA PROTEÇÃO E MANOBRA EM REDES DE DISTRIBUIÇÃO DE ENERGIA / RELIABILITY HEURISTIC ALGORITHMS FOR PROTECTION AND MANEUVERING DEVICES DISTRIBUTION NETWORKS
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 cons
Publicado em: 2008
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17. Research and development in the irrigated rice seeds sector in Rio Grande do Sul State / Pesquisa e desenvolvimento no setor de sementes de arroz irrigado no Rio Grande do Sul
The aim of this work was to investigate the ways in which the organizations dedicated to the research and development (R&D) of rice irrigated seeds in the Rio Grande do Sul State face the action of opportunist agents, which promote the commerce and the informal use of genetic materials protected by Law. The research problem was structured as the following qu
Publicado em: 2008
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18. Feeders parallelism through vis-a-vis disconnecting switches in aerial primary distribution network. / Paralelismo de alimentadores através de seccionadoras de vis-à-vis na rede aérea primária de distribuição.
An important aspect related to the distribution systems operation concerns the safety required in the post-disturbances restorement actions or in the emergency and scheduled maneuvers, which involve the need for load transfer between primary overhead feeders of a same sub-station or for an adjacent sub-station, in a safe and reliable way, complying with the
Publicado em: 2008
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19. Geographic Indication and market construction: the value of the origin of the Mineiro Cerrado. / Indicação Geográfica e construção do mercado: a valorização da origem no Cerrado Mineiro
Geographic Indication (GI) comes as a protection tool to farmers and has been becoming in a qualification process that links the product to the environmental and social characteristics of its origin. In this way, qualification goes beyond the technical aspects and denotes an intense process of dispute and negotiations, generating productivity, political and
Publicado em: 2008
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20. Nitrosilo complexos de rutênio : síntese, caracterização e avaliação de suas potencialidades citotóxicas / Nitrosyl ruthenium complexes : synthesis, characterization and evaluation of its cytotoxic potentialities
The behavior of nitric oxide (NO) in biological systems has been under intense investigation in recent years in view of its possibly crucial role in a variety of physiological processes. Great progress in this area has been achieved by studying nitrosyl transition metal complexes. In this sense ruthenium complexes are by far the most studied and their relati
Publicado em: 2008
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21. CONTRIBUTIONS TO STUDY OF WIND FARM CONNECTION TO THE UTILITY / CONTRIBUIÇÕES AO ESTUDO DE CONEXÃO DE GERAÇÃO EÓLICA À REDE ELÉTRICA
Distribution systems have not been designed to receive distributed generation (DG) units. The electric energy injection in these systems is safe and reliable if the characteristics regarding of DG interconnection in distribution power systems are considered: (i) Protection; (ii) Stability; (iii) Electric energy market; (iv) Quality of energy. In this work, a
Publicado em: 2007
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22. Myoglobins: the link between discoloration and lipid oxidation in muscle and meat
Aerobic metabolism changes rapidly to glycolysis post-mortem resulting in a pH-decrease during the transformation of muscle in to meat affecting ligand binding and redox potential of the heme iron in myoglobin, the meat pigment. The "inorganic chemistry" of meat involves (i) redox-cycling between iron(II), iron(III), and iron(IV)/protein radicals; (ii) ligan
Química Nova. Publicado em: 2006-12
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23. Overcurrent protection in electrical distribution systems through probabilistic approach. / Proteção de sobrecorrente em sistemas de distribuição de energia elétrica através de abordagem probabilística.
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
Publicado em: 2006
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24. Behavior of humpback whales calves, Megaptera novaeangliae, around Abrolhos Archipelago, Bahia (Brazil) / Comportamento de filhotes de baleia jubarte, Megaptera novaeangliae, na região ao redor do Arquipélago dos Abrolhos, Bahia (Brasil)
To characterize the behavior of humpback whales calves, a study was conduct around Abrolhos Archipelago, an important nursing area for the species in Brazil. It was investigated aspects of the behavioral development of calves, behavioral differences between calves of different breeding seasons and also the effects of the presence of one escort in the behavio
Publicado em: 2006