Optimal Power Flow
Mostrando 25-36 de 41 artigos, teses e dissertações.
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25. Resolução do problema de fluxo de carga para redes de distribuição utilizando o metodo desacoplado rapido com rotação automatica de eixos / Fast decoupled load flow method with automatic axes rotation for distribution systems
The fast decoupled loadflow (FDLF) [2] is a variant of the traditional Newton method [1] for solving the loadflow problem (find the operational state of electrical power networks). It is well-known that FDLF presents unsatisfactory performance when applied to distribution systems. Their unfavourable r/x branch ratios may lead to divergence or slow convergenc
Publicado em: 2006
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26. ANALYSIS OF THE TRUSTWORTHINESS IN NETS OF DISTRIBUTION RADIAL: RECONFIGURATION AND ALOCATION OF DISTRIBUTED GENERATION / Análise da Cconfiabilidade em Redes de Distribuição Radiais: Reconfiguração e Alocação de Geração Distribuída
The distribution utilities must satisfy two concurrent objectives during planning process of the electric network: minimization of the investment cost and the satisfaction of reliability targets. An alternative to satisfy these objectives is to include low cost alternatives in the planning process. One of these alternatives is the reconfiguration of the dist
Publicado em: 2006
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27. INCLUSION OF DYNAMIC RESTRICTIONS IN THE ANALYSIS OF OPTIMAL POWER FLOW / INCLUSÃO DE RESTRIÇÕES DINÂMICAS NA ANÁLISE DE FLUXO DE POTÊNCIA ÓTIMO
Este trabalho propõe a inclusão de restrições dinâmicas na análise de Fluxo de Potência Ótimo (FPO), envolvendo o problema associado ao fechamento de anel elétrico e ao planejamento de fontes de potência reativa. Os algoritmos desenvolvidos utilizam a metodologia primal-dual de pontos interiores (MPI) associada à técnica de decomposição matemá
Publicado em: 2006
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28. REMUNERAÇÃO DOS SERVIÇOS ANCILARES DE SUPORTE DE POTÊNCIA REATIVA E RESERVA DE POTÊNCIA QUANDO PROVIDOS POR GERADORES / PRICING THE ANCILLARY SERVICES OF REACTIVE POWER SUPPLY AND GENERATION RESERVE WHEN PROVIDED BY GENERATORS
Este trabalho apresenta metodologias para definir a remuneração dos geradores que provêem serviços ancilares em função do benefício proporcionado ao sistema. São analisados os serviços ancilares de suporte de potência reativa e reserva de potência. Para o serviço ancilar de suporte de potência reativa, o valor do benefício proporcionado pelos g
Publicado em: 2005
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29. Um modelo de fluxo de potencia otimo linear com reprogramação corretiva via metodo de pontos interiores
This study presents a Linear Optimal Power Flow model with Corrective Rescheduling, using a Primal-Dual Logarithmic-Barrier Interior-Point Method. The Linear Optimal Power Flow model determines a feasible economical operation solution for a Basic Case, but does not consider the occurrence of contingencies. The Linear Security Constrained Optimal Power Flow m
Publicado em: 2004
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30. Effects of wet CO oxidation on the operation of engines and power generators
A simplified method is used to determine the optimum water content in the flue gases of charcoal gasifiers to be utilized as alternative fuels in the operation of engines and gas turbines for power generation. Computational models of plug flow reactors and well stirred reactors are employed to simulate the reaction and post-flame zones, adopting different ch
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
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31. COSTS ALLOCATION OF REACTIVE POWER DEVICES / IDENTIFICAÇÃO DOS BENEFICIÁRIOS E ALOCAÇÃO DE CUSTOS DE FONTES DE POTÊNCIA REATIVA
No atual modelo econômico do setor elétrico, é necessário identificar os agentes beneficiados pelos serviços ancilares à transmissão de potência de forma a alocar adequadamente os custos de investimento, de operação e manutenção do equipamento necessário para a prestação do serviço. Entre os serviços ancilares, destaca-se o suporte de potên
Publicado em: 2003
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32. VOLTAGE STABILITY REINFORCEMENT ON ELETRIC POWER SYSTEMS / REFORÇO DAS CONDIÇÕES DE ESTABILIDADE DE TENSÃO NA OPERAÇÃO DO SISTEMA ELÉTRICO
As the electric power transmission networks became more interconnected, the thermal limits of lines and transformers restrict less the power transmission. Similarly, the use of static systems of reactive power compensation increases the power transmission capacity in systems whereas before they were limited by problems of angular stability. Actually, transmi
Publicado em: 2002
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33. Fluxo de potencia otimo parametrico
The aim of this work is to present a parametric method for the resolution of the Optimal Power Flow (OPF) problem applied to large scale power systems. This research work on parametric optimization applied to OPF was developed at UNICAMP and at McGiII University, in Montreal, Canada. The parametric approach consists of relaxing the original problem (OPF) by
Publicado em: 2000
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34. Metodos de solução do fluxo de potencia otimo reativo e tratamento das restrições de desigualdade
The Reactive Optimal Power Flow (ROPF) is a computational optimization tool that dispatches all reactive power sources of an electrical power system. It is extremely important in power system planning, operation and voltage collapse simulation. Its mathematical modeling involves nonlinear nonconvex equality constraints and linear and nonlinear nonconvex ineq
Publicado em: 1999
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35. Resfriamento por convecção natural de placas de circuito impresso formando um canal vertical
Experiments and theoretical modeling were carried out on the cooling by natural convection of an array of vertical parallel printed circuit boards. The thermal analysis of printed circuit boards (PCB) for predicting, as accurately as possible, the temperature of each component is important to obtain an optimal thermal design and to check the performance of a
Publicado em: 1997
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36. TEORIA DAS BIFURCAÇÕES EM SISTEMAS ELÉTRICOS DE POTÊNCIA: UMA APLICAÇÃO AO PROBLEMA DE OTIMIZAÇÃO / BIFURCATION THEORY IN ELECTRICAL POWER SYSTEMS: AN APPLICATION TO THE OPTIMIZATION PROBLEM
This work aims at studying bufurcation theory associated to non-linear differential equations systems with application on stability of electrical power systems. As an application of this theory, the problem of optimal operation in power systems is analyzed. New restriction to optimum power flow are found and together with traditional ones, assure the stabili
Publicado em: 1995