Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/1363
Título: Natural gas system operation: lagrangean optimization techniques
Autor: Nogueira, Teresa
Vale, Zita
Palavras-chave: Lagrangean optimization techniques
Natural gas
Data: 2008
Editora: Curran Associates, Inc.
Relatório da Série N.º: International Gas Union Research Conference; Vol. 2
Resumo: To comply with natural gas demand growth patterns and Europe´s import dependency, the gas industry needs to organize an efficient upstream infrastructure. The best location of Gas Supply Units – GSUs and the alternative transportation mode – by phisical or virtual pipelines, are the key of a successful industry. In this work we study the optimal location of GSUs, as well as determining the most efficient allocation from gas loads to sources, selecting the best transportation mode, observing specific technical restrictions and minimizing system total costs. For the location of GSUs on system we use the P-median problem, for assigning gas demands nodes to source facilities we use the classical transportation problem. The developed model is an optimisation-based approach, based on a Lagrangean heuristic, using Lagrangean relaxation for P-median problems – Simple Lagrangean Heuristic. The solution of this heuristic can be improved by adding a local search procedure - the Lagrangean Reallocation Heuristic. These two heuristics, Simple Lagrangean and Lagrangean Reallocation, were tested on a realistic network - the primary Iberian natural gas network, organized with 65 nodes, connected by physical and virtual pipelines. Computational results are presented for both approaches, showing the location gas sources and allocation loads arrangement, system total costs and gas transportation mode.
URI: http://hdl.handle.net/10400.22/1363
ISBN: 9781615678709
Aparece nas colecções:ISEP – GECAD – Comunicações em eventos científicos

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