Abstract

PEREZ ABRIL, Ignacio. Multi-Objective Optimization of the Phase-Balancing in Primary Distribution Circuits. Energética [online]. 2016, vol.37, n.2, pp. 84-93. ISSN 1815-5901.

The unbalance of the phase currents in the primary distribution circuits produces two fundamental problems: the energy losses in the primary conductors are increased and the presence of a high neutral current on normal operation make it difficult the detection of earth faults by the neutral over current relays. The present work implements a Non-dominated Sorting Genetic Algorithm (NSGA-II) application for the phase balancing problem, which search for the minimal reconnection needed for the two-phase three-wire and the single-phase two-wire circuit laterals, as well as for the three-phase transformer banks and the single-phase distribution transformers, to minimize both: the energy losses and the maximum neutral current of the circuit. The successful performance of this application is achieved by the new definition of the set of independent variables, which permits the NSGA-II to optimize the selection of the elements to be reconnected. A test example is solved to shows the features of the presented approach.

Keywords : distribution systems; NSGA-II; phase balancing.

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