Alocação de banco de capacitores em redes de distribuição utilizando algoritmo evolutivo diferencial com restrição por ressonância harmônica

Abstract

This work presents a methodology for the allocation of capacitor banks in radial distribution networks with differential binary evolution algorithm. The allocation of capacitor bank aims to reduce the electric losses from reactive power present in the network, aiming at the optimization of system operation, cost reduction and maintenance of energy quality. The allocation of capacitor banks presents as a non-linear, multiobjective optimization problem subject to several operational restrictions and quality standards. In this work eight types of capacitor bank were used, among them, four fixed types and four automatic types, where the algorithm is able to select possible combinations of capacitor bank installation, in order to minimize electrical losses, and consequently improve Voltage and power factor in the feeder, without any transgression of the standards imposed by the regulators, and to minimize the cost of installing the capacitor banks. The methodology is tested in a real system of a Brazilian utility of electricity distribution, taking into account two levels of demand, in order to simulate the load of the network to better identify the possibility of installing automatic and fixed capacitor bank . The results obtained demonstrate that the proposed algorithm was able to minimize conflicting objectives such as loss reduction and cost, respecting the operational constraints as well as, guaranteeing solutions that do not cause harmonic resonance, very important in the present day given the growth of nonlinear loads, pointing The applicability of the proposal of this work.