Harmonic Analysis of a Photovoltaic Systems Connected to Low Voltage Grid

Solar Energy is clean, renewable and applicable in every place with a good solar incidence such as Brazil. The photovoltaic system is generally composed by photocells which are able to produce direct current through solar light incidence and, when connected to the grid, it needs an inverter to convert direct current in alternate current. This equipment can bring negative impact in the power quality provided from the main grid, such as voltage oscillation and harmonic distortion. In this context, this article presents an analysis of power quality using a quality analyzer on a photovoltaic system connected to the local distribution grid. All measurements were realized in a residential 3.38 kWp-photovoltaic system with an inverter. Harmonic spectrum were measured and analyzed based on the limits established in PRODIST Module 8 and IEEE 519 at the connection point of common coupling (PCC).