On the performance of space vector EPLL-based grid synchronization technique during power quality disturbances

The detection of the fundamental frequency and phase angle of the positive sequence grid voltages are utmost necessary for the proper operation of controlled active power converters, which require to operate stable and robust even during the presence of diverse power quality issues. There exist various utility grid synchronization and detection methods based on Phased-Locked Loop (PLL) techniques. In this paper, a grid synchronization technique based on the enhanced PLL implemented in the stationary reference frame is presented. The algorithm has been implemented and validated on an FPGA control board. Simulation studies and experimental investigations have been conducted to evaluate its performance under diverse power quality disturbances.