Results 31 to 40 of about 1,100,817 (204)

System strength and weak grids: fundamentals, challenges, and mitigation strategies

, 2018
Converter-based renewable energy sources (RES) and battery energy storage (BES) devices that are asynchronously connected to the system are becoming more and more widespread. A number of relevant stability issues, usually in areas with little synchronous
Tapan Kumar Saha, Mancarella, Pierluigi, Ruifeng Yan, Saha, Tapan Kumar, Dozein, Mehdi Ghazavi, Yan, Ruifeng, Mehdi Ghazavi Dozein, Pierluigi Mancarella   +7 more
core   +1 more source

Modelling and Stability Analysis of Wind Power Plants Connected to Weak Grids

Applied Sciences, 2019
It is important to develop modelling tools to predict unstable situations resulting from the interactions between the wind power plant and the weak power system.
Esmaeil Ebrahimzadeh, Frede Blaabjerg, Torsten Lund, John Godsk Nielsen, Philip Carne Kjær   +4 more
doaj   +1 more source

Line Inductance Stability Operation Domain Assessment for Weak Grids With Multiple Constant Power Loads [PDF]

, 2021
Weak grids are gaining considerable attention since power generation resources are remote from constant power loads (CPLs), which results in low-frequency/harmonic oscillation.
Qin, Dehao, Wang, Peng, Sun, Qiuye, Peng, Wang, Ma, Dazhong, Gui, Yonghao; id_orcid, Gui, Yonghao, Wang, Rui   +7 more
core   +1 more source

Hybrid power plant control to enhance voltage stability in weak grid

International Journal of Electrical Power & Energy Systems
This paper presents the potential of hybrid power plants (HPPs) to improve voltage stability in weak grids. Moving towards converter-based generations, installation capacity of the available renewable sources is significantly limited by weak grids. While
Fatemeh Shahnazian, Kaushik Das, Ruifeng Yan, Poul E. Sorensen   +3 more
doaj   +1 more source

Comparison of PLL-Based and PLL-Less Control Strategies for Grid-Following Inverters Considering Time and Frequency Domain Analysis

IEEE Access, 2022
This article presents a comprehensive comparison of three control strategies used for grid-following inverters (GFLIs). The first strategy is the phase-locked loop (PLL)-based vector current control (VCC), and the other two PLL-less controllers are the ...
Nabil Mohammed, Weihua Zhou, Behrooz Bahrani   +2 more
doaj   +1 more source

Reactive Power-Voltage Droop Gain Online Tuning Method of Photovoltaic Inverters for Improvement of Stable Output Power Capability in Weak Grids

Shanghai Jiaotong Daxue xuebao
The active power output capability and small signal stability in weak grids are key factors that limit stable photovoltaic (PV) power generation. To improve stably generating PV power in weak grids, an adaptive control method for PV inverters based on ...
WANG Yuyang, ZHANG Chen, ZHANG Yu, WANG Yiming, XU Po, CAI Xu
doaj   +1 more source

Grid-Connected Converters: A Brief Survey of Topologies, Output Filters, Current Control, and Weak Grids Operation

Energies, 2023
Grid-connected converters (GCCs) are used extensively for the integration of DC power sources with AC power sources. However, since it is a complex topic, there are many possibilities for regulating grid-injected currents, as well as different modulation
Guilherme V. Hollweg, Shahid A. Khan, Shivam Chaturvedi, Yaoyu Fan, Mengqi Wang, Wencong Su   +5 more
doaj   +1 more source

Enhanced Q-axis Voltage Integral Damping Control for Fast PLL-Synchronized Inverters in Weak Grids

, 2023
The phase-locked loop (PLL) is a commonly used synchronization control method for grid-tied inverters. The PLL-synchronized inverters tend to have poor stability robustness with weak grid interconnections, especially when the PLL is designed with a high ...
Liang Zhao (13530160), Lennart Harnefos (10844848), Feifan Chen (16812666), Xiongfei Wang (12437481), Mikko Routimo (16845408), Jarno Kukkola (16845405)   +5 more
core   +1 more source

Invisible but not inaccessible—Revealing transient oligomers formed by intrinsically disordered proteins with solution NMR and complementary methods

FEBS Letters, EarlyView.
Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley   +1 more source

Machine learning-guided optimal power flow for weak hybrid AC-DC grids [PDF]

This paper presents a novel machine learning-guided approach for optimal power flow in weak hybrid AC-DC grids. The methodology addresses two key challenges: voltage stability in weak grids and the integration of LCC-HVDC systems.
Banatwala, Ali Z., Gu, Chenghong; id_orcid, Pei, Xiaoze; id_orcid   +2 more
core   +1 more source