Results 41 to 50 of about 34,712 (114)

Grid-Forming Voltage-Source Inverter for Hybrid Wind-Solar Systems Interfacing Weak Grids

IEEE Open Journal of Power Electronics
This paper presents a grid-forming (GFM) voltage-source inverter (VSI) with direct current regulation for a hybrid wind-solar generator, enabling stable operation at very weak grid conditions and under faults.
Amr Radwan, Mahmoud A. Elshenawy, Yasser Abdel-Rady I. Mohamed, Ehab Fahmy El-Saadany   +3 more
doaj   +1 more source

Enhancing stability control of Phase-Locked loop in weak power grids

International Journal of Electrical Power & Energy Systems
This paper analyzes the factors affecting the stability of phase-locked loops (PLLs) in weak power grids. By establishing a PLL model in weak power grids, it is found that line impedance, grid frequency disturbances, and output power all have an impact ...
Andong Liu, Hongbo Cao, Jun Liu
doaj   +1 more source

An optimal allocation strategy for GFM and GFL converters considering transient voltage stability constraints

Zhejiang dianli
The hybrid grid-forming （GFM） and grid-following （GFL） converter integration systems combine the technical advantages of GFM voltage sources and GFL current sources.
LI Qun, TANG Weijia, WANG Chenggen, ZHANG Sen   +3 more
doaj   +1 more source

Adaptive hybrid synchronization control of grid-connected converters in renewable power plants and its small-signal stability analysis

Zhejiang dianli
As the capacity of renewable power plants connected to the grid increases year by year， optimizing the control strategies for their converters becomes crucial for enhancing system stability.
GONG Kai, XIAO Huangqing, ZHANG Zhan, HE Hongliang, HUANG Ying, LI Yan   +5 more
doaj   +1 more source

Research on Reliability Improvement Method of Mountainous Power Grid Considering Electrified Railways Access

Energies
The mountainous power grids exhibit significantly lower reliability compared to conventional urban grids due to inherent structural weaknesses, dispersed load distribution, and higher failure probabilities of power supply equipment.
Like Pan, Yingxin Zhao, Tong Xing, Haibo Zhang, Wenrui Dai, Zhanhao Dong   +5 more
doaj   +1 more source

Mechanism of Power Transfer Limit Under Multiple Electrical Constraints for Grid-Connected New Energy Units and Full-Power Operation Conditions in Weak Grids

Shanghai Jiaotong Daxue xuebao
To address the issue of active power transfer limits for new energy units in weak grids, current research lacks analytical methods that consider multiple electrical constraints of new energy systems, including constraints such as maximum steady-state ...
ZHANG Yu, ZHANG Chen, LIU Hui, YU Siqi, WU Linlin, CAI Xu
doaj   +1 more source

Model predictive control of three-level grid-connected inverters for weak power grids

Zhejiang dianli
In weak power grids， grid-connected inverters often suffer from poor robustness and significant harmonics. Moreover， model predictive control （MPC） heavily relies on system parameters， limiting its applicability in weak grids.
ZHAO Leilei, MU Wei, SONG Huiqing, ZHANG Min, WANG Shan   +4 more
doaj   +1 more source

Comprehensive Modulation Strategies for Synchronous Reluctance Motor Drives Used in Weak Grids

Energies
Synchronous reluctance machines are considered a cost-effective solution for several industrial applications and present potential efficiency benefits compared to induction motors.
Shuo Wang, Dmytro Prystupa, Yuli Bao, Vasyl Varvolik, Giampaolo Buticchi, He Zhang, Michele Degano   +6 more
doaj   +1 more source

Impact of Grid Strength on the Transient Dynamics of Droop- and VSM-Based Grid-Forming Converters

International Transactions on Electrical Energy Systems
With the increasing use of converter-based resources, it has become more crucial to comprehend the dynamic interaction between grid-forming (GFM) control strategies and power system transients under different grid strengths.
Qusay Salem, Rafat Aljarrah
doaj   +1 more source

Assessing Techno‐Economic Performance of Synchronous Condensers and Static Synchronous Compensators in Renewable Energy‐Integrated Weak‐Grids Using Hedge Feedforward Feedback‐Based Online Gated Recurrent Unit

IET Smart Grid
To achieve net‐zero targets in many counties, renewable energy generators (REGs) are integrated with grids where less fault current is produced compared to synchronous generators.
Md Ohirul Qays, Iftekhar Ahmad, Daryoush Habibi, Mohammad A. S. Masoum   +3 more
doaj   +1 more source