Power Quality Analysis of a Photovoltaic Power Plant Connected to the Distribution Network: a Case Study of a 2 MWp Photovoltaic Power Plant

Abstract

This article presents an in-depth analysis of the impact of connecting a photovoltaic (PV) power plant to the distribution networks (MV). The specificity of the study lies in the particular case of the connection of a 2 MWp photovoltaic power plant to the medium voltage network (22 kV). The power supply for this connection is provided by a three-phase inverter, a crucial element that can influence power quality by causing various disturbances such as harmonics, imbalances, and flickers. The context of the study explores power quality records, obtained via a quality analyzer installed in the connection between the inverter and the power grid, and thus providing an in-depth understanding of fluctuations and anomalies during the operation of the PV plant, particularly at the beginning and end of the day. This analysis includes a detailed assessment of power quality, highlighting both grid disturbances and those generated specifically by the PV plant installation. The results will contribute to a better understanding of the challenges involved in integrating PV power plants into distribution networks, paving the way for solutions and adjustments needed to ensure harmonious and efficient cohabitation between renewable energies and existing electricity infrastructures.