Results 71 to 80 of about 167,660 (319)

Hybrid vector modulated model predictive control of bidirectional voltage source converter under unbalanced grid voltages

Systems Science & Control Engineering
For the power control problem of a bidirectional voltage-source converter, because only one voltage vector is applied at each control period, the traditional model predictive direct power control strategy brings in high harmonic content. In this paper, a
Zhichao Zhao, Licheng Wang, Jin Xiong, Zahoor Ahmed   +3 more
doaj   +1 more source

Leaftronics: Bio‐Fractal Scaffolds From Leaf Venation for Low‐Waste Electronics

Advanced Materials, EarlyView.
“Leaftronics” transforms naturally evolved leaf venation into quasi‐fractal scaffolds for sustainable electronics. Polymer‐infiltrated leaf skeletons can be used to fabricate ultra‐smooth, reflow‐ and thin‐film‐compatible decomposable substrates, while making the same lignocellulose networks conducting results in flexible transparent electrodes.
Rakesh Rajendran Nair, Hrisheekesh Thachoth Chandran, Karl Leo, Hans Kleemann   +3 more
wiley   +1 more source

Dynamic Modeling and Robust Controllers Design for Doubly Fed Induction Generator-Based Wind Turbines under Unbalanced Grid Fault Conditions

Energies, 2019
High penetration of large capacity wind turbines into power grid has led to serious concern about its influence on the dynamic behaviors of the power system.
Imran Khan, Kamran Zeb, Waqar Ud Din, Saif Ul Islam, Muhammad Ishfaq, Sadam Hussain, Hee-Je Kim   +6 more
doaj   +1 more source

An application of four‐wire grid‐forming power inverter in unbalanced distribution network

IET Generation, Transmission & Distribution, 2023
The modelling of a three‐phase four‐leg four‐wire grid‐forming inverter in a low voltage distribution system 18‐bus European Cigré under unbalanced conditions in an autonomous distribution network is presented.
Jéssica S. Döhler, Raul P. Mota, João Antônio G. Archetti, Dalmo C. Silva Júnior, Cecilia Boström, Janaína G. Oliveira   +5 more
doaj   +1 more source

Scalable Electric Vehicle Charging Protocols

, 2016
Although electric vehicles are considered a viable solution to reduce greenhouse gas emissions, their uncoordinated charging could have adverse effects on power system operation.
Giannakis, Georgios B., Kekatos, Vassilis, Zhang, Liang   +2 more
core   +1 more source

Material Selection and Geometric Design for Few‐filament Shape Memory Polymer Yarns for Force Generation

Advanced Materials Technologies, EarlyView.
A custom shape memory polymer material selection process relates quantitative application criteria (e.g., compression garment yarns) to material characterization information. The selected materials are manufactured into yarn geometries, which expand the design space by creating structural stress‐strain profiles beyond the nominal material stress‐strain
Michaela Andrews, Susan Mantell, Julianna Abel   +2 more
wiley   +1 more source

Control of Three-phase Four-leg Micro-grid Inverter in Islanding Mode

Kongzhi Yu Xinxi Jishu, 2013
Off-grid operation is one of the significant characteristics of micro-grid. In off-grid mode, unbalanced loads will cause voltage unbalance and degrade the performance of micro-grid.
TAN Lanlan
doaj  

Compensation of negative sequence stator flux of doubly-fed induction generator using polar voltage control-based direct torque control under unbalanced grid voltage condition

The Journal of Engineering, 2015
This study proposes a polar voltage control-based direct torque control method to reduce the effects of unbalanced grid voltage on doubly-fed induction generator (DFIG)-based wind turbine system.
Badrinarayan Bansilal Pimple, Vishal Yashwant Vekhande, Baylon G. Fernandes   +2 more
doaj   +1 more source

Laser‐Induced Ultrafast Magnetic Phase Transition in 2D Van Der Waals Antiferromagnetic Heterostructures

Advanced Science, EarlyView.
In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu, Fulu Zheng, San‐Dong Guo, Thomas Frauenheim, Zhaobo Zhou, Junjie He   +5 more
wiley   +1 more source

Controlling the doubly fed induction generator based wind turbines during normal and disturbed grid voltage [PDF]

, 2016
This work presents an improved strategy in the field of predictive control (PC) of the doubly fed induction generator (DFIG). The proposed strategy applies four voltage vector in every period in order to have constant switching frequency and low current ...
Rodríguez Arribas, Jaime, Veganzones Nicolas, Carlos, Zarei, Mohammad Mahdi   +2 more
core