Modelo computacional de cortes para otimizar o potencial de geração de usinas hidrelétricas / Computacional model of cuts to optimize the potential to generate hydro power plants

AUTOR(ES)
DATA DE PUBLICAÇÃO

2011

RESUMO

The repowering of hydro power plants increases their generating capacity by improving the structure or changing equipment. It is a low cost alternative to improve the generation capacity comparing with the building of new plants. Repowering by changing the hydro-turbines is the focus of this work. By doing that, the efficiency of the energy generation process is improved but, the efficiency is not constant. It can be described by a curve. The curve shape depends on the turbine s characteristics. The aim of this work is, given some possible turbines curve shapes, determine the combination of curves that optimizes the power plant generation according to the plant operational characteristics. A mixed integer nonlinear programming was formulated and a parallel implementation of Bender s decomposition method was developed to solve the problem of mathematical optimization. Simulations were done with data given by the São Francisco s Hydroelectric Company (CHESF). It was concluded that the ideal would be charged to the levels using a repowering turbines with profiles of different curves and not only one profile

ASSUNTO(S)

otimização matemática usinas hidrelétricas energia elétrica - produção sistemas de energia elétrica - produção mathematical optimization hydroelectric power plants electricity electric power systems

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