Distributed series/hybrid-shunt compensation for harmonic mitigation in commercial facilities

This work presents the development and application of an electronically controlled harmonic mitigation device based on the insertion of active series harmonic impedances in the electric network. These active harmonic impedances are inserted at specific frequency (or frequencies). Important advantages of the proposed system are the reduced converter rating and the utilization of coaxial transformers with single turn secondary. In this paper, the active harmonic impedance device is applied to implement distributed harmonic mitigation strategy, leading to a flexible and cost-effective solution for industrial and commercial power systems applications. The desired overall results are investigated through modeling and simulation of an actual commercial facility, based on the PTW - Power Tools for Windows/SKM. Harmonic distortions and harmonic sources data are measured in the considered facility, characterizing the situation before and after the implementation of series-shunt compensation for harmonic mitigation.