The changes the electric sector has undergone over the last decades have imposed new challenges to the utility companies, which have driven researches for improvements in the distribution system without giving up the optimal use of resources. The adequacy to sector regulations, constant search for reduction in losses, increasing demand and the insertion of new paradigms, such as distributed generation, have been widely studied topics. The use of properly allocated Capacitor Banks has long been one of the main strategies used to maintain electrical variables such as voltage, power factor and feeder loading within the appropriate levels. On the other hand, the increasing presence of harmonics in the network adds limitations to this strategy. In this context, this work proposes the use of NSGA-II, a multiobjective metaheuristic, in solving the Problem of Capacitor Banks Allocation in three-phase radial distribution networks, considering harmonic resonance phenomena due to the presence of nonlinear loads. The multiobjective approach allows the user to choose from a range of solutions, one that best suits their needs. The results showed great relevance of harmonic distortion and resonance index analysis to obtain optimized solutions for the allocation problem, allowing increased quality of the energy delivered to the consumer and lifespan of the equipments that constitute the distribution network.
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