Comparison of DSOGI-Based PLL for Phase Estimation in Three-Phase Weak Grids

The paper presents a summary of different double second-order generalized integrator (DSOGI)-based phase-locked loop (PLL) algorithms for synchronization with three-phase weak grids. methods are compared through simulation under variety grid conditions, such as unbalanced phase voltages, high low-order harmonics distortion, frequency steps, jumps, and voltage sags. Following the results, three that have shown overall best results an experimental setup further validation operation voltage-source converter. Based on obtained benchmark table is presented allows ranking performance tested expected conditions.