Alocação multiobjetivo e multicritério de chaves e dispositivos de proteção em redes de distribuição sob condições de incerteza

Abstract

Minimizing the impact of faults is a recurring problem in the power distribution sector. To deal with this, distribution companies often resort to the allocation of switches and protection devices, which act in a way that tries to clear the fault, isolate the smallest possible part of the affected network, and restore consumers. In this context, this Thesis proposes a multi-objective approach to the problem of allocating protection and switching devices, having as objective functions the investment cost and an estimate of the network's reliability. This problem also encompasses distributed generation, island operation, and coordination between devices. The uncertainties associated with distributed generation and the estimation of fault currents are analyzed. A multi-criteria decision-making approach is also proposed to assist in choosing the final solution. This strategy is based on the definition of additional criteria to evaluate the performance of the alternatives, as well as the use of methods to aid decision-making, allowing the incorporation of the decision unit's preferences, leading to a definition of final action that is adequate to the needs of the decision maker. The results highlight the advantages of a multi-objective approach to device allocation and the relevance of a multi-criteria strategy to assist in assertive decision-making for different scenarios.