Time-Domain Analysis of Power Quality Adverse Effects of Grid Interconnected Photovoltaic Generation

The photovoltaic generation is being interconnected to power systems at a growing rate as a renewable and alternative energy source. The influence of this type of generation on the operation, stability, reliability and power quality of the electrical network requires to be analyzed. This work presents the modeling, and the time-domain solution of these systems to assess the power quality adverse effects during the operation of the power grid with photovoltaic generation. Harmonics, total harmonic distortion, electromagnetic transients such as faults, load transients, and voltage sags are evaluated. The modeling and case studies include the photovoltaic array model with maximum power point tracking controller, the voltage source DC/DC converter model with a pulse width modulation controller, and the DC/AC interconnection converter model for single-phase and three-phase cases with sinusoidal pulse width modulation controller. The time-domain results can be used to assess the power quality indexes.