Security System Operation
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. Computational algorithm for stability analysis of distribution networks with distributed generation
Abstract With the insertion of distributed generation in distribution networks, security analysis becomes crucial, in islanded operation or when the system is connected to the grid. Dynamic stability analyses are necessary in order to achieve minimum levels of security and reliability. Such analyses are obtained through the solution of the algebraic-differen
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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2. Maritime Co-operation among South Atlantic Countries and Repercussions for the Regional Community of Security Practice
Abstract This paper aims to examine the importance of co-operation for maritime security in the South Atlantic, focusing on the relationship between the national and sub-regional institutions that have leveraged this process, especially those from Brazil. For this purpose, the diagnosis addresses the debates around the contemporary roles of the navy and the
Contexto int.. Publicado em: 08/05/2017
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3. Explaining Co-operation and Conflict in Southern Africa: State-building, Foreign Policy and Regional Order
Abstract Abstract: Between 1975 and 1988, the Southern African regional system was marked by high levels of systemic conflict involving direct and indirect armed confrontation between South Africa and its neighbours. This reality sharply contrasts with the co-operative environment that has gradually formed since 1989. Following the trends towards deepening
Contexto int.. Publicado em: 2016-08
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4. Produção de sentido em processos decisórios [manuscrito] : um estudo no contexto de eventos inesperados na perspectiva da análise da conversa
This work deals with sensemaking and organizational decision in risk and stress situations. These situations are constant in complex organizations that need security in their processes. In emergency times, workers interact together in order to understand the situation and make decisions to decrease errors and accidents. To study the interactions, the approac
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/03/2012
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5. Application of Bayesian Networks in the human error contribution analysis of collision accidents. / Aplicação de Redes Bayesianas na análise da contribuição do erro humano em acidentes de colisão.
Recently, in the naval industry, the normalization of classification societies and IMO (International Maritime Organization) has presented a gradual change, going from prescriptive procedures to a regulatory structure based on risk. That perspective offers some advantages to operators and constructors: 1) greater capacity to incorporate innovations in design
Publicado em: 2010
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6. Sistema de suporte a decisão para analise e previsão de carga por barramento / Decision support system to the analysis and bus load forecasting
In a power operation system there are many variables that can Influence the execution of t ho control routines. The attendance of these variables is very important to aid the processes in the safe operation of the system. In the electric system the bus load level is an important variable in operation planning step. Accurate Information on the load level In e
Publicado em: 2009
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7. Um estudo de planejamento da expansão da transmissão em sistemas de potência considerando a incerteza
This work presents the development of a model for long term transmission expansion planning, which considers the system security (N-1 criterion), the cost of congestion, the impact of new facilities in system operation and the risk associated to demand growth uncertainty. It is proposed in the planning methodology the usage of load curtailment tolerance rela
Publicado em: 2009
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8. MULTICRITERIA OPTIMISATION OF HYDROTHERMAL SYSTEMS OPERATION USING GENETIC ALGORITHMS / OTIMIZAÇÃO MULTICRITÉRIO DA OPERAÇÃO DE SISTEMAS HIDROTÉRMICOS UTILIZANDO ALGORITMOS GENÉTICOS
In Brazil, the planning of the energy operation of the National Interconnected Power System is currently done through a chain of mathematical models designed to optimise the planning according to criterion of minimisation of the expected value of the total operation`s cost. However, since the 2001-2002 energy supply crisis, there was an intensification in th
Publicado em: 2008
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9. PRÉ-DESPACHO DE POTÊNCIA ATIVA CONSIDERANDO AS ÓTICAS DOS AGENTES GERADORES E DO OPERADOR DO SISTEMA / PRE-ORDER IN ACTIVE POWER CONSIDERING THE OPTICIANS OF AGENTS GENERATORS AND SYSTEM OPERATOR
The restructuring and deregulation of electricity markets has caused signicant changes in electrical power systems in several countries. This process has result in a market-based competition by creating an open market environment. In this new environment each generation company runs the Unit Commitment to maximize their prots, and have no obligation to meet
Publicado em: 2008
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10. CENÁRIOS FUTUROS DE OFERTA E DEMANDA DE ENERGIA ELÉTRICA: SIMULAÇÕES DO POSSÍVEL RACIONAMENTO ATÉ 2011 / FUTURES SETTINGS OF SUPPLY AND DEMAND OF ELECTRIC ENERGY: SIMULATIONS OF POSSIBLE ENERGY-RATIONING UNTIL 2011
The Brazilian electric energy generation system is a hydrothermal system of great size, with predominance hydroelectric plants. Its peculiar size and characteristics is the only one in the world. Consequently, its coordination is very complex and, therefore, it´s necessary the correct planning and operation to prevent or reduce problems related to supplemen
Publicado em: 2008
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11. Proposta de um sistema de medição de desempenho aplicado à mecanização agrícola: um estudo de caso no setor sucroalcooleiro / Proposal of a performance measurement system applied to agricultural mechanization: a study case in sugarcane agro-industrial sector
Leaders organizations of different sectors have a common characteristic, ability to measure your own performance and to use this measurement in an intelligent form to search higher level. In agricultural sector, efforts in that direction are still inexpressive. In function of the importance witch mechanized systems have for agricultural business success, due
Publicado em: 2008
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12. OtimizaÃÃo multiobjetivo da confiabilidade via sistemas multiagentes baseado em colÃnia de formigas
This dissertation presents the modeling, implementation and results of a multiagent system based on ant colony metaheuristic to solve multiobjectve problems on reliability engineering area. We will consider redundancy allocation and periodic tests policy problems. High reliability and low associated costs are objectives of all systems projects. Meanwhile, in
Publicado em: 2008