Resumo

MARTINEZ, José Alexander  e  MARTINEZ S., Fredy Hernán. Optimization of maintenance management of trees in power distribution systems. Tecnura [online]. 2013, vol.17, n.35, pp.12-25. ISSN 0123-921X.

We propose a data-analysis-based methodology for maintaining trees that affect power distribution networks. From the information captured in the field, we use fuzzy-logic-based techniques and models together with genetic algorithms so as to focus maintenance activities on the optimal time and place. The strategy is aimed at two key aspects: first, the history of failure events caused by trees on medium-voltage power supply systems; this information is used to calculate quality indicators such as energy-not-supplied (ENS) and number-of-users (NU) affected due to falling trees only. In this case we use a fuzzy-logic-based system to weight and find the critical circuits on which forest maintenance should be performed. Second, we construct an objective function based on tree-to-network distances and growth patterns of trees (classifed per species) in order to simulate forest maintenance; this is achieved using a genetic algorithm to determine optimum pruning cycles for a given power supply system. We use real historical data of medium voltage circuits for system setting as well as for performance evaluation.

Palavras-chave : fuzzy systems; genetic algorithms; maintenance; power distribution networks; trees.

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