Power Transmission Planning
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Impactos socioambientais da implantaÃÃo de linha de transmissÃo de energia elÃtrica sobre as comunidades extrativistas do babaÃu no Estado do MaranhÃo
The Construction of transmission power lines brings great benefits for the society. However, it uses the natural resources and develops activities that affect the environment. This fact becomes necessary that the Company actions must be guided, in its phases of planning, implantation and operation, towards to execute its mission, considering the constitution
Publicado em: 2006
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14. Transmission systems expansion planning using DC-AC models and non-linear programming techniques / Planejamento da expansão de sistemas de transmissão usando os modelos CC - CA e tecnicas de programação não-linear
Neste trabalho são propostos modelos matemáticos e técnicas de solução para resolver o problema de planejamento da expansão de sistemas de transmissão através de três enfoques. a) Usando o modelo de corrente alternada do sistema de transmissão e um algoritmo heurístico construtivo especializado para resolver o problema de planejamento, e, ainda, r
Publicado em: 2006
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15. Optimal dispatch of generating units in hydroelectric systems by heuristic based on langrangean relaxation and dynamic programming / Despacho otimo de unidades geradoras em sistemas hidreletricos via heuristica baseada em relaxação lagrangeana e programação dinamica
The daily scheduling operation of the electrical energy system has by target to find the dispatch generation to the next day which must be compatible with the daily generation target defined by the energy planning models and to be an operational guide. Because of its proximity with the real time operation the modeling must represent the main characteristic o
Publicado em: 2006
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16. Transmission systems expansion planning considering security and generation programming plans / Planejamento da expansão de sistemas de transmissão considerando segurança e planos de programação da geração
This Ph.D. thesis presents some proposals to solve the transmission network expansion planning problem, static and multistage, taking into account security constraints - (n _ 1) security criterium, and the transmission expansion planning to satisfy some generation programming plans. Trying to find optimal solutions to large scale power systems, the specializ
Publicado em: 2005
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17. Avaliação das ações de controle da transmissão vertical do HIV/AIDS entre puérperas atendidas em uma maternidade de Fortaleza-ce. / Evaluation of the actions of control of the vertical transmission of the HIV/AIDS between postpartum women taken care in a fortaleza-ce maternity
The women in fertile age have been target of the contamination for the HIV, what it requires special attention, mainly in the gestation, therefore there is the risk of the vertical transmission (VT) of the HIV. The agreed therapy of high power showed decisive in the reduction of the VT tax, however the measures of control are not satisfactory. It was objecti
Publicado em: 2005
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18. Um modelo de previsão de carga por barramento
In the operation of an electric power system, an important stage is the determination of the daily operation programme, which determines a plan of electric power production for the following day(s) for each of the generating units of the system, usually on an hourly or a half-hourly basis. This programme is used by the system s real time operation as an oper
Publicado em: 2004
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19. Metaheuristicas aplicadas ao planejamento da expansão da transmissão de energia eletrica em ambientes de processamento distribuido
In this work, several combinatorial metaheuristics are developed for solving the transmission expansion planning problem of electric power systems that is analysed considering the static and long-term approach, e.g. a parallel version of the simulated annealing methodology and several parallel versions of a genetic algorithms, besides an asynchronous team wh
Publicado em: 2004
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20. Um algoritmo para estimação de estado em alimentadores de distribuição de energia elétrica com base no método da soma de potências
Most algorithms for state estimation based on the classical model are just adequate for use in transmission networks. Few algorithms were developed specifically for distribution systems, probably because of the little amount of data available in real time. Most overhead feeders possess just current and voltage measurements at the middle voltage bus-bar at th
Publicado em: 2003
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21. UtilizaÃÃo de fatores locacionais de perdas no planejamento da expansÃo de sistemas de transmissÃo
This work presents a diagnosis and suggests changes to the planning criteria currently in use in the Brazilian electric sector, focusing on the way how to treat the electrical losses in the analyses for determining the expansion of the Basic Network, due to the recent creation of a methodology for calculating Loss Factors in the electrical system, considerin
Publicado em: 2002
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22. ACQUISITION COST ALLOCATION OF REACTIVE POWER SOURCES / ALOCAÇÃO DO CUSTO DE CAPITAL DE FONTES DE POTÊNCIA REATIVA / ASIGNACIÓN DEL CUSTO DE CAPITAL DE FUENTES DE POTENCIA REACTIVA
This report presents three methods to identify the transmission consumers in power systems that take advantage of new or existent reactive power sources and, consequently, to allocate its acquisition costs among these consumers. The methodology to obtain the allocation factors, applied to each of the agents, takes into account the analysis of a transmission
Publicado em: 2001
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23. Uma metodologia de planejamento da expansÃo da transmissÃo baseada em trade-off e indicador de mÃrito econÃmico
Since the last ten years the electrical industry have been experiencing an intensive restructuring process worldwide. This process varies from country to country in accordance with their characteristics. However a common objective has been identified: the increase in terms of efficiency through the introduction of competition in the energy production and tra
Publicado em: 2000
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24. Otimização da expansão conjunta da geração e transmissão em sistemas hidrotermicos de potencia atraves do algoritmo de decomposição de benders e equacionamento das incertezas relativas as vazoes afluentes aos reservatorios, das usinas hidroeletricas, previsões do mercado e custo de instalação das novas usinas
A new approach is developed in this work for the joint generationltransmission expansion planning of hydrothermal electric power systems. The goal is to determine the generating capacity of the candidate plants, the commissioning dates of their generating units, their production scheduling, the new transmission lines and their voltage levels, as well as the
Publicado em: 1995