Redução de perdas na distribuição de energia eletrica pelo metodo GRASP

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

Energy is continuously dissipated in electric power systems due to electrical resistance in the lines and equipment. Losses amount to around 7% of total energy production, 2% in transmission and 5% in distribution. The problem of loss minimization tries to find a network configuration where the amount of losses is reduced. This work proposes a procedure that combines non-linear network flow optimization techniques with the GRASP method. GRASP is an iterative method that uses a combination of a constructive procedure with a local search. The construction phase obtains a feasible solution, combining a greedy function with a randomize selection. The local search tries to improve the solution. The structure of the electric power distribution network usually has a radial configuration. Initially, the constraint of radial operation is relaxed, meeting an optimistic solution (a lower bound) for the problem. Information from are flows in the optimistic solution are used to open switches, guiding the construction phase of GRASP to find feasible and good quality solutions. The local search tries to get additional reductions of losses through the branch-exchange procedure. Case studies iIIustrate the possibilities of the approach

ASSUNTO(S)

sistemas de energia eletrica otimização combinatoria energia eletrica - distribuição heuristica

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