Results 21 to 30 of about 1,100,817 (204)

AVR adjustment of Synchronous Generators in Weak Grids under Faulty Conditions. [PDF]

, 2013
In weak grids, an important problem with voltage stability and protections coordination of power plants exists. This problem appears because all the generation groups are connected to the same bus bar.
Blázquez García, Francisco, F. R. Blanquez, Rebollo López, Emilio, Carlos. A. Platero, E. Rebollo, Platero Gaona, Carlos Antonio, Blánquez Delgado, Francisco, F. Blazquez   +7 more
core   +1 more source

Frequency-coupled impedance model based subsynchronous oscillation analysis for direct-drive wind turbines connected to a weak AC power system

The Journal of Engineering, 2019
Recently, the emerging subsynchronous oscillation (SSO) issue caused by interactions between power electronic converters and weak grids has provoked serious stability concerns. Impedance modelling based method has been widely used to analyse the emerging
Wei Liu, Xiaorong Xie, Jan Shair, Jingbo He   +3 more
doaj   +1 more source

Control Performance Characterization and Monitoring Scheme for Power Converters in Weak Grids

IEEE Open Journal of Power Electronics, 2023
In weak grids, control performance of power converters is negatively affected by the significantly varied grid impedance, which can easily lead to degradation of anti-harmonic performance, resonances or even system instability.
Jiachen Wang, Qing Liu, Xiangchen Zeng, Weijian Han, Zhen Xin   +4 more
doaj   +1 more source

Differential Flatness-Based Performance Enhancement of a Vector Controlled VSC With an LCL-Filter for Weak Grids

IEEE Access, 2021
In this paper, a novel single-loop flatness-based controller (FBC) is proposed to control the grid-side current in a shunt converter connected to a weak grid through an LCL-filter.
Hassan Abdullah Khalid, Carlo Cecati, Nasser Ahmed Al-Emadi, Adel Gastli, Lazhar Ben-Brahim   +4 more
doaj   +1 more source

"Weak Grids "Weak Grids and and GridGrid--Forming Converters"Forming Converters"

, 2021
This presentation was part of the SP5 & SP6 WEBINAR on Grid solutions to realize 450 GW of offshore wind capacity by 2050.
openaire   +2 more sources

Active Damping Adaptive Controller for Grid-Connected Inverter Under Weak Grid [PDF]

IEEE Access, 2021
The stability of grid-connected inverters is very sensitive to varying grid impedance, especially in the weak grid condition. In this paper, based on the Lyapunov method and with the micro-grid impedance identification, an active damping adaptive control strategy is proposed to guarantee local asymptotic stability for an LCL inverter system.
Hong Li, Xin Ding, Ruinan Xue, Guojin Li, Yanming Chen   +4 more
openaire   +2 more sources

Influence of Active Power Output and Control Parameters of Full-Converter Wind Farms on Sub-Synchronous Oscillation Characteristics in Weak Grids

Energies, 2020
Active power outputs of a wind farm connected to a weak power grid greatly affect the stability of grid-connected voltage source converter (VSC) systems.
Yafeng Hao, Jun Liang, Kewen Wang, Guanglu Wu, Tibin Joseph, Ruijuan Sun   +5 more
doaj   +1 more source

Power-Synchronized Grid-Following Inverter Without a Phase-Locked Loop

IEEE Access, 2021
This paper proposes a power-synchronized control strategy for grid-following inverters (GFLIs) to regulate their power exchange with the grid without any need for sensing/regulating the point of connection voltage.
Behrooz Bahrani
doaj   +1 more source

INTEGRATION OF WIND FARMS INTO WEAK AC GRIDS [PDF]

, 2020
Large wind farms are usually located in remote and offshore areas. High voltage transmission systems that have long transmission distances are used to deliver the wind power to main grids. Weak AC grids have high impedance, low short circuit ratio (SCR) and/or low inertia compared to strong AC grids.
openaire   +1 more source

Comparison of converter control schemes for weak grids [PDF]

, 2018
Voltage source converter is used in power systems for connecting a renewable energy source to an AC grid or as an active front-end rectifiers in AC motor drives.
Riaz, Usama
core   +1 more source