A double-PLLs-based impedance resha** method for extending stability range of grid-following inverter under weak grid

L Huang, C Wu, D Zhou… - IEEE Transactions on …, 2021‏ - ieeexplore.ieee.org
Conventional vector current control scheme has been widely used in grid-connected inverter
systems. However, it suffers from severe power limitation issues under weak grids. This …

Promising grid-forming vsc control schemes toward sustainable power systems: Comprehensive review and perspectives

K Mahmoud, P Astero, P Peltoniemi… - IEEE Access, 2022‏ - ieeexplore.ieee.org
Driven by environmental and economic aspects, the proliferation of renewable energy
sources (RES) has been expanded in power systems worldwide. In this regard, the …

Efficient wind energy integration in weak AC Grid with a DLMF-based adaptive approach

GS Chawda, AG Shaik, W Su - Applied Energy, 2024‏ - Elsevier
Power quality issues in weak grids with large impedance pose significant challenges that
limit wind energy (WE) penetration levels and the performance efficiency of existing WE …

Analysis of controller bandwidth interactions for vector-controlled VSC connected to very weak AC grids

JF Morris, KH Ahmed… - IEEE Journal of Emerging …, 2020‏ - ieeexplore.ieee.org
Stability assessment of conventional vector current control (VCC) of voltage-source
converters (VSCs) in weak grids has not been standardized. In this article, a small-signal …

A multivariable controller in synchronous frame integrating phase-locked loop to enhance performance of three-phase grid-connected inverters in weak grids

S Silwal, M Karimi-Ghartemani, H Karimi… - … on Power Electronics, 2022‏ - ieeexplore.ieee.org
This article presents a new current controller in the synchronous reference frame and its
associated design for enhancing the performance of three-phase grid-connected inverters …

Stability analysis of a weak-grid-connected voltage-sourced rectifier considering the phase-locked loop dynamics

S Jeong, G Jang - IEEE Transactions on Power Systems, 2022‏ - ieeexplore.ieee.org
The high bandwidth of a phase-locked loop (PLL) can deteriorate the small-signal stability of
a voltage-sourced converter (VSC) under a weak grid condition. This instability can occur for …

Voltage source converters connected to very weak grids: Accurate dynamic modeling, small-signal analysis, and stability improvement

S Rezaee, A Radwan, M Moallem, J Wang - IEEE Access, 2020‏ - ieeexplore.ieee.org
The interfacing of the vector-controlled voltage-source converters (VSCs) into weak grid
(WG) systems can induce severe instabilities. This is attributed to interactions between the …

Grid-forming vector current control

M Schweizer, S Almér, S Pettersson… - … on Power Electronics, 2022‏ - ieeexplore.ieee.org
In this article, a novel point of view on grid-forming control with current controlled power
electronic converters is presented. A control concept based on the emulation of the …

Dc-Link Ripple Suppression of Cascaded H-Bridge Based MV Grid Emulator Apparatus for Analysis and Testing of Grid-Tied Converters in Distribution System

J Sheng, C Li, X **ang, W Li… - IEEE Transactions on …, 2023‏ - ieeexplore.ieee.org
The medium-voltage grid emulator is gaining popularity for testing grid-code compliance of
large-capacity converters for renewable energy resources. The cascaded H-bridge …