This work presents an analysis about the power quality, carried out in a real electrical
energy distribution grid, considering different customers groups, located in the low
voltage grid. The study was made in two steps. The first one through measurements
registered in the transformers of the distribution grid supplied by CEA – Amapá’s
Electricity Company, previously classified in groups as: commercial group, residential
group and home-and-commercial group, identifying and characterizing the generators
sources of harmonics generation in the system, making possible, this way, an
analysis of the harmonic injection level in the distribution grid as well as the impacts
these distribution sources of harmonic generation can provoke in the power quality
offered by the CEA utility. The last stage of the study presents the use of a threephase
harmonic load flow, where, considering the harmonic profile found out through
the measurements carried out, a global evaluation of the system is provided.
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