Power Quality Analysis for a PV Plant in Uruguay

Abstract

In this paper is presented the procedure adopted by UTE to study the impact of new Photovoltaic (PV) plants connected into the distribution grid. The studies presented focus on harmonic and flicker emissions. In both cases, international standards are used to estimate emissions in the connection node based on data given by the inverter manufacturers. After this, field measurements are performed first before the new PV plant is connected to evaluate the previous state of the grid, and then after the PV plant is connected, to evaluate the actual impact of the plant. All the measurements and the estimated values obtained in the first stage are compared to the limits provided also by international standards. The aim of this paper is to present a real case of the first 8MW PV plant connected to the 31,5kV network in Uruguay, along with the standards and criteria adopted. Finally, a brief comparison between theoretical and real values and their limits is presented.