Results 71 to 80 of about 3,167,411 (345)

Complex Contagions in Kleinberg's Small World Model [PDF]

, 2014
Complex contagions describe diffusion of behaviors in a social network in settings where spreading requires the influence by two or more neighbors.
Ebrahimi, Roozbeh, Gao, Jie, Ghasemiesfeh, Golnaz, Schoenebeck, Grant   +3 more
core   +1 more source

Review of HVDC technologies for weak grid interconnectors

Electrical Engineering
HVDC has experienced substantial growth in utilization globally, attributable to its superior capacity for transmitting large amounts of power relative to its HVAC counterpart and its increasingly competitive pricing. Voltage source converter technology, a variant of HVDC, is particularly well suited for transferring bulk offshore power, whether in ...
Roni Irnawan, Rian Fatah Mochamad, Filipe Faria da SIlva, Qi Zhang, null Sarjiya, Claus Leth Bak, Evy Haryadi   +6 more
openaire   +2 more sources

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

High Frequency Resonance Damping of DFIG based Wind Power System under Weak Network [PDF]

, 2017
When operating in a micro or weak grid which has a relatively large network impedance, the Doubly Fed Induction Generator (DFIG) based wind power generation system is prone to suffer high frequency resonance due to the impedance interaction between DFIG ...
Blaabjerg, Frede, Song, Yipeng, Wang, Xiongfei   +2 more
core   +2 more sources

Explicit Impedance Modeling and Shaping of Grid-Connected Converters via an Enhanced PLL for Stabilizing the Weak Grid Connection

IEEE Access, 2022
The voltage source converters (VSCs) are used to interface and control the renewable energy resources that are integrated into the power grids. However, a weak grid connection raises a stability problem for grid synchronization of the grid-feeding ...
Mohsen Eskandari, A. Savkin, Hassan Haes Alhelou, F. Blaabjerg   +3 more
semanticscholar   +1 more source

Distribution of Electrical Resistivity in Single Carbon Fiber Filaments and Its Correlation With Tensile Modulus

Advanced Engineering Materials, EarlyView.
A statistical framework is applied to quantify the distribution of electrical resistivity among individual filaments of two commercially available carbon fiber types. Correlations between filament resistivity, tensile modulus, and diameter are examined and complemented by TEM analysis to provide new insight into filament‐level variability relevant for ...
Nils Wieja, Daniel Sebastian Wolz, Philip Johannes Steinbild, Markus Löffler, Darius Pohl, Jan Wolf, Anja Winkler, Thomas Behnisch, Bernd Rellinghaus, Maik Gude   +9 more
wiley   +1 more source

Enhanced Stability and Power Quality Control of LCL-GCI Under Weak Grid Conditions Using THQVC

IEEE Access
Grid disturbances and weak grid conditions often lead to synchronization instability in LCL- filtered grid-connected inverters (LCL-GCI), causing challenges in maintaining system stability and power quality.
Pratchaya Pathomchaiwat, Bunlung Neammanee, Jirawut Benjanarasut   +2 more
doaj   +1 more source

Improved Capacitor Voltage Feedforward for Three-Phase LCL-Type Grid-Connected Converter to Suppress Start-Up Inrush Current

Energies, 2017
Three-phase active damping LCL-type grid-connected converters are usually used in distributed power generation systems. However, serious inrush current will be aroused when the grid-connected converter starts, especially in rectifier mode, if no ...
Shiying Zhou, Xudong Zou, Donghai Zhu, Li Tong, Yong Kang   +4 more
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Oscillation suppression strategy for direct drive wind power system based on voltage feedforward compensation for phase locked loop

CSEE Journal of Power and Energy Systems
Due to the fact that the impedance of grid interacts with that of direct-drive wind turbines under weak grid, the direct-drive wind power system (DDWPS) possesses the risk of power oscillation.
Haining Wang, Zhiwei Xie, Yandong Chen, Wenhua Wu, Zili Wang   +4 more
doaj   +1 more source