Power Quality Analysis of a Grid Connected PV System

Abstract - Power quality (PQ) is a critical aspect of electrical systems, especially in renewable energy applications like photovoltaic (PV) systems connected to the grid. A grid-connected PV system can introduce various power quality disturbances such as voltage sags, harmonics, flicker, and frequency deviations. This study investigates the power quality performance of a grid-connected PV system under different operational conditions. The analysis includes monitoring and evaluation of voltage, current, power factor, harmonics, and other electrical parameters to assess their compliance with established international standards. The impact of irradiance variations, temperature changes, and system configuration on the overall power quality is also examined. Furthermore, the integration of power quality improvement techniques, such as the use of filters and advanced inverter control strategies, is explored to mitigate these disturbances and improve system performance. The findings highlight the importance of efficient power quality management in ensuring reliable operation and smooth integration of PV systems with the electrical grid. The study further emphasizes the importance of proper grid synchronization techniques and real-time monitoring systems that enable operators to detect and address power quality problems promptly. The integration of real-time sensors and smart grid technologies can provide early warnings about power quality degradation and enable corrective actions before any major damage occurs. Moreover, this research highlights the role of standards and regulations in ensuring the compliance of PV systems with acceptable power quality levels. The study draws on international standards such as IEEE 519 and IEC 61000 to evaluate the extent to which grid-connected PV systems adhere to these guidelines. Finally, this work aims to contribute to the ongoing efforts to improve the reliability and stability of power grids incorporating renewable energy sources. By identifying the specific challenges associated with PV system integration and proposing viable solutions, this research supports the development of more resilient and efficient power grids that are capable of accommodating a higher share of renewable energy without compromising power quality. Keywords: Power Quality, Grid-Connected PV System, Harmonics, Voltage Sag, Inverter Control, Renewable Energy, Power Factor, Flicker, System Configuration, Photovoltaic, Electrical Disturbances.