Planeamiento de la expansión de los sistemas de transmisión con enfoque multivoltaje AC

Abstract

The problem of planning the expansion of the transmission system allows defining where, how much and when new infrastructure should be added, in order to meet the energy demand of the power system while minimizing the costs in expansion and operation, complying with technical, economic and safety restrictions. To date, several methods have been proposed to solve the static problem, with a multi-voltage approach and DC load flow (simplified method). However, these solutions may not be feasible in large-scale systems; in addition, they do not indicate the right time to execute the expansion plan. To overcome such drawbacks, this paper proposes a dynamic model with AC load flow and multi-voltage approach, in which the effect of transmission losses and reactive power compensation on the expansion plan is evaluated. The dynamic problem with multi-voltage AC approach (PDET-MV) is solved with the hybrid metaheuristics Differential Evolution – Continuous Populations Based on Incremental Learning (DE-PEBILc). Results show that transmission system voltage elevation is only feasible in the long term when transmission loss costs are considered.