Results 11 to 20 of about 34,712 (114)

Real-Time Transient Voltage and Frequency Sensing Strategy for Resilience Enhancement of PV-Storage Systems in Weak Grids [PDF]

Sensors
Photovoltaic (PV)-storage systems operating in weak grids are affected by high grid impedance, transient voltage disturbances, and measurement noise, which can degrade frequency regulation, increase converter current stress, and impose high-frequency ...
Yu Ji, Zixuan Liu, Xin Gu, Chenze Huo, Zihan Zhang, Song Tang, Jun Mei, Can Huang   +7 more
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Optimizing weak grid integrated wind energy systems using ANFIS-SRF controlled DSTATCOM [PDF]

Scientific Reports
This paper proposes an intelligent control strategy based on the adaptive neuro-fuzzy inference system (ANFIS) to enhance power quality in wind energy systems connected to weak grids.
Peram Venkata Ramana, K. Mercy Rosalina
doaj   +2 more sources

Seepage analysis based on weak finite element method

Yantu gongcheng xuebao, 2023
In the design and operation management of hydraulic structures such as dams, gates and embankments, the seepage calculation plays a very important role. The current methods for seepage analysis are mainly based on the general finite element method. It is
HE Zhaokui 1, SU Baoyu 2, SHENG Jinchang 2, LUO Yulong 2
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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
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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
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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
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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
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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
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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

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
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