ANCHIETA FILHO, J.; http://lattes.cnpq.br/7152772308917359; ANCHIETA FILHO, José de.
Abstract:
The growing use of renewable energy sources to the detriment of the use of non-renewable
sources reveals a consolidated environmental concern with the emission of greenhouse gases
and the worsening of global warming. Given this, the Brazilian energy matrix has a significant
share of renewable energy sources. Photovoltaic solar energy is a form of energy that is widely
disseminated with an annual growth rate of approximately 15% and Brazil is favored due to its
geographical characteristics and low variability of solar irradiation. An example of this type of
generation are grid-connected photovoltaic systems (SFCR). In this case, frequency inverters
are used to interface with the power grid. However, photovoltaic inverters have their operation
based on power electronics, which is characterized by having devices with non-linear behavior.
As a result, the growth of SFCR can gradually degrade the Electric Power Quality in the
distribution systems. Therefore, the present work has as main objective to carry out an
evaluation of the Electric Power Quality (PQ) of a photovoltaic inverter connected to the
electrical distribution grid. Among the analyzed parameters, harmonic distortion in the network,
voltage unbalance and voltage fluctuations stand out. The results obtained during the
monitoring were compared with the Module 8 – PRODIST standard, which deals with the
quality of electrical energy. It is noted in the results obtained in the research that the total voltage
harmonic distortion remained below 10%, the voltage harmonic distortion values of the even
and odd components not multiples of 3, as well as the harmonic components multiples of 3,
obtained lower values , respectively, 2%, 7.5% and 6.5%. The voltage unbalance values
remained below 3% and the voltage fluctuation was below 1 pu. Note that frequency inverters
allow a reduction in voltage harmonic distortion.
