Results 81 to 90 of about 2,064 (185)

Black-Start and Hot-Swap Performance Assessment and Improved Control Strategy for Grid-Forming VSC and CSC-Based PV Systems

IEEE Open Journal of Industry Applications
The grid-forming (GFM) control of voltage-source converter (VSC)-based photovoltaic (PV) systems has shown promise in supporting the grid frequency and inertia.
Md. Mizanur Rahman, Yasser Abdel-Rady I. Mohamed   +1 more
doaj   +1 more source

Quantitative Stability Conditions for Grid-Forming Converters With Complex Droop Control

, 2023
In this paper, we study analytically the transient stability of grid-connected distributed generation systems with grid-forming (GFM) complex droop control, also known as dispatchable virtual oscillator control (dVOC). We prove theoretically that complex
Dörfler, Florian, He, Xiuqiang, Huang, Linbin, Häberle, Verena, Subotić, Irina   +4 more
core  

VSS-GFM: A Voltage-Source-Sustaining Grid-Forming Strategy for Seamless Operation Under Severe Disturbances

Grid-forming (GFM) control strategies face critical challenges in fault response, protection coordination, and grid code compliance. Conventional voltage-controlled GFM (VC-GFM) and current-controlled GFM (CC-GFM) each possess distinct advantages but individually fail to fully address these challenges. This paper systematically analyzes both VC-GFM and
Guoqing Gao, Shan He, Liang Huang, Qi Zhang, Frédéric Colas, Xavier Guillaud, Frede Blaabjerg   +6 more
openaire   +1 more source

Sensitivity-based impedance modeling of AC voltage-controlled converters [PDF]

Loads affect the stability of grid-forming (GFM) converters, both in stand-alone and grid-connected modes. This has motivated the development of methods that study the stability of GFM converters using an impedance-based analysis.
Doval Gandoy, Jesús, Pérez Estévez, Diego, Ríos Castro, Diego   +2 more
core   +1 more source

Comparative Impedance Characteristic Analysis of Grid‐Following and Grid‐Forming Inverters

IET Renewable Power Generation
This paper comprehensively analyses the impedance characteristics of grid‐following (GFL) and grid‐forming (GFM) inverters at around synchronous frequency areas considering various operating and grid connection conditions and control settings.
Yonggang Zhang, Peter Unruh, Boris Fischer, Martin Braun   +3 more
doaj   +1 more source

Grid-Forming Inverter Integration for Resilient Distribution Networks: From Transmission Grid Support to Islanded Operation

Electricity
The progressive replacement of synchronous machines by inverter-based resources (IBRs) reduces system inertia and short-circuit strength, making power systems more vulnerable to frequency and voltage instabilities.
Mariajose Giraldo-Jaramillo, Carolina Tranchita   +1 more
doaj   +1 more source

Low Voltage Ride-Through Capability of Grid-Connected PV Systems: A Comparative Study of Grid-Following and Grid-Forming Converters Under Current Limits

IEEE Access
This study investigates the Low Voltage Ride-Through (LVRT) capabilities of grid-connected photovoltaic (PV) systems, focusing on the comparative performance of Grid-Following (GFL) and Grid-Forming (GFM) converters under current limit constraints.
Zainab M. Almesri, Hussain A. Hussain, Rashad M. Kamel   +2 more
doaj   +1 more source

Stability and Resynchronization of Current-Constrained VOC-Based GFM Inverters Through Revisiting Traditional Power System Criteria

IEEE Open Journal of Power Electronics
As inverter-based resources and renewable energy systems continue to increase their penetration in modern power grids, maintaining system stability has become a critical challenge.
Kazuki Watanabe, Daisuke Iioka
doaj   +1 more source

Dual-frames-impedance-based analysis of dynamic phase difference effect on grid-forming converter with different power synchronization controls

International Journal of Electrical Power & Energy Systems
The grid-forming converters (GFMs) have been widely employed to support the power grid. Yet, the phase difference effect (PHE) caused by active power control (APC) on the system's design and stability is still inexplicable.
Xianfu Lin, Ruoxue Yu, Jingrong Yu, He Wen   +3 more
doaj   +1 more source

A virtual test facility for simulating the dynamic response of materials [PDF]

, 2000
The goal of the Caltech Center is to construct a virtual test facility (VTF): a problem solving environment for full 3D parallel simulation of the dynamic response of materials undergoing compression due to shock waves.
Aivazis, Michael, Goddard, William A., Meiron, Dan, Ortiz, Michael, Pool, James, Shepherd, Joseph   +5 more
core