Results 31 to 40 of about 1,867,604 (284)

Stability Control of Grid-Connected Converter Considering Phase-Locked Loop Frequency Coupling Effect

Energies
Given the problems that the phase-locked loop frequency coupling effect (PLL-FCE) in a weak grid reduces the quality of the output current waveform and brings challenges to maintaining a steady running of the grid-connected converter (GCC), this paper ...
Ye Zhang, Haibo Pen, Xiaoyu Zhang
doaj   +1 more source

A Control Parameters Design Method With Multi-Constrains for an LCL-Filtered Grid-Connected Inverter in a Weak Grid

Frontiers in Energy Research, 2022
Under weak grid conditions, the variation of the grid impedance will affect the steady-state and dynamic performance of the LCL-filtered grid-connected inverter and even make the inverter unstable.
Fuyun Wu, Zhuang Sun, Weiji Xu, Zhizhou Li, Jianguo Lyu   +4 more
doaj   +1 more source

Stability enhancement control strategy for grid-connected wind power system based on composite feedforward damping

International Journal of Electrical Power & Energy Systems
The stability of grid-connected wind power system (GCWPS) is prone to deteriorate due to the impedance interaction between wind turbines and the weak grid.
Haining Wang, Zhiwei Xie, Yandong Chen, Wenhua Wu, Zhen Zhu, Jiayuan Gao   +5 more
doaj   +1 more source

The Collaborative Semantic Grid

, 2006
Grid and Semantic Web technologies both enable heterogeneous resources to be joined up to achieve new functionality and capability, and their combined effectiveness has been demonstrated through a number of ‘Semantic Grid’ projects. These typically apply
De Roure, David, Michaelides, Danius, Page, Kevin, Frey, Jeremey, Page, KR, Roure, DD, Frey, JG, Michaelides, DT   +7 more
core   +2 more sources

Control Strategy of Vienna Rectifier With LCL Filter Under Weak Grid Conditions

发电技术, 2019
For the LCL type filter, there is a natural resonance peak, and the change of the grid impedance in the actual power grid will further affect the stability of the rectifier.
Yuanpeng FENG, Jiuhe WANG, Jianguo LI, Qiaojie ZHANG   +3 more
doaj   +1 more source

Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid

Energies, 2022
In a distributed generation system, the all-pass-filter phase-locked loop (APF-PLL) is a commonly used method for grid synchronization. However, the coupling effect between APF-PLL and current control loop increases the risk of oscillation instability ...
Longyue Yang, Tian Cao, Huapeng Chen, Xinwei Dong, Shuyuan Zhang   +4 more
doaj   +1 more source

Golgi enzymes are retrieved from the plasma membrane to the trans‐Golgi network

FEBS Letters, EarlyView.
Golgi enzymes are traditionally considered resident proteins retained within the Golgi apparatus. Here, we demonstrate that a subset transiently reaches the cell surface and is subsequently retrieved to the trans‐Golgi network via retrograde transport. Using a nanobody‐based toolkit, we uncover a dynamic trafficking cycle of several Golgi enzymes.
Dominik P. Buser, Tina Junne
wiley   +1 more source

Voltage stability improvement of weak grids using a new cascade droop control of grid-connected converter

International Journal of Electrical Power & Energy Systems
The voltage control loop of a virtual synchronous generator (VSG) is typically governed by a conventional reactive power-voltage droop control, which may exhibit instability when encountering disturbances or operating under weak grid conditions.
Hayder Hassan Abbas, Qobad Shafiee, Hassan Bevrani   +2 more
doaj   +1 more source

Voltage Weak DC Distribution Grids [PDF]

Electric Power Components and Systems, 2017
AbstractThis paper describes the behavior of voltage weak DC distribution systems. These systems have relatively small system capacitance. The size of system capacitance, which stores energy, has a considerable effect on the value of fault currents, control complexity, and system reliability.
Tsegay Gebremedhin Hailu, Laurens Mackay, Laura M. Ramirez-Elizondo, Jan A. Ferreira   +3 more
openaire   +3 more sources

User oriented access to secure biomedical resources through the grid [PDF]

, 2006
The life science domain is typified by heterogeneous data sets that are evolving at an exponential rate. Numerous post-genomic databases and areas of post-genomic life science research have been established and are being actively explored. Whilst many of
Watt, J, Ajayi, O, Jiang, J, Ajayi, O., Sinnott, R, Jiang, J., Sinnott, R.O., Stell, A, Stell, A.J., Watt, J.   +9 more
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