An Adaptive Quadrature Signal Generation-Based Single-Phase Phase-Locked Loop for Grid-Connected Applications.

The quadrature signal generation-based phase-locked loops (QSG-PLLs) are highly popular for synchronization purposes in single-phase systems. The main difference among these PLLs often lies in the technique they use for creating the fictitious quadrature signal. One of the most popular QSG approaches is delaying the original single-phase signal by a quarter of a cycle. The PLL with such QSG techni...