A phase-locked loop (PLL) is a nonlinear negative-feedback control system that
synchronizes its output in frequency as well as in phase with its input. PLLs are now widely …

The contribution of solar photovoltaic (PV) in the electrical power sector is increasing
expeditiously. Recent interest in the integration of solar PV into the grid raises concerns …

Grid synchronization algorithms are of great importance in the control of grid-connected
power converters, as fast and accurate detection of the grid voltage parameters is crucial in …

Recently, several advanced phase-locked loop (PLL) techniques have been proposed for
single-phase applications. Among these, the Park-PLL and the second-order-generalized …

For doubly fed induction generator (DFIG)-based wind energy conversion systems (WECSs),
large electromotive force will be induced in the rotor circuit during grid faults. Without proper …

In this paper, the low-voltage ride-through (LVRT) capability of the doubly fed induction
generator (DFIG)-based wind energy conversion system in the asymmetrical grid fault …

Due to the significance of extracting the grid voltage information, the grid synchronization
system plays an important role in the control of grid-connected power converters, and …

With increasing the penetration of distributed and renewable sources into power grids, and
with increasing the use of power electronics-based devices, the dynamic behavior of large …

The grid voltage phase and frequency are crucial information in control of most grid-
connected power electronic-based equipment. Most often, a phase-locked loop (PLL) is …

A new proposal for the placement, integration, and control of unified power quality
conditioner (UPQC) in distributed generation (DG)-based grid connected/autonomous …