Abstract: In recent years, the widespread adoption of phase-locked loop type grid-connected converters has presented new challenges for transient stability and small-signal stability analysis of power …

Impedance-Circuit-Based Stability Analysis for PLL-Synchronized Voltage Source Converter in Weak Grid Publisher: IEEE PDF

Apr 1, 2025 · Subsequently, the influence of PLL on the stability of grid-connected inverters is analyzed, focusing on three key factors: grid impedance, harmonics, and external time-delay control.

Jan 1, 2022 · Commonly, this stability problem (referred to as PLL-synchronization stability in this paper) was studied by employing a single-converter system connected to an infinite bus, which, however, …

A modified sequence-domain impedance definition and its equivalence to the dq-domain impedance definition for the stability analysis of AC power electronics systems.

Jul 12, 2024 · This model elucidates the interplay between the GCC’s output impedance, the PLL-FCE and the grid impedance. It also unveils the impact of the PLL-FCE on system stability in weak grid …

Feb 16, 2026 · The results demonstrate that the PLL and current loop control have been demonstrated to affect port impedance significantly, and reduced current loop gain and lower grid strength have …

Mar 5, 2024 · Using phase plane analysis, this study investigates the transient synchronism of the grid-following converter (GFL) and explores the influence of delay time constants from the three PLL …

First, the impedance models of the single-phase inverter with the basic T/4 delayed PLL and SOGI-PLL are developed. Then, the influence of these PLLs on the stability of inverter is analyzed by means of …

The study also compares the impedance and stability of remote converters under grid-forming control with power synchronization and grid-following with Phase Locked Loop (PLL) (PV or PQ control …