Results 21 to 30 of about 15,286 (265)

An efficient electromagnetic transient modeling and simulation method for ANPC three-level converters

Zhejiang dianli
According to a small-step real-time simulation study on active neutral-point clamped （ANPC） three-level converters， existing electromagnetic transient modeling methods are inferior in model accuracy， computational efficiency， simulation scale， etc.
LI Yang, TIAN Fang, ZHANG Xing, MU Qing
doaj   +1 more source

DAE Index Reduction for Electromagnetic Transient Models

CoRR
Electromagnetic transient (EMT) models are index-2 differential-algebraic equations when they include certain topologies and are formulated with modified nodal analysis. Such systems are difficult to numerically integrate, a challenge that is currently addressed by applying model approximations or reformulating with index-reduction algorithms.
Fiona Majeau, José Daniel Lara, Eduardo Corona, Bri-Mathias S. Hodge   +3 more
openaire   +2 more sources

Research on borehole transient electromagnetic positioning method of azimuthal coil scanning detection

Meitan xuebao
The borehole transient electromagnetic method is used to detect the long-range water-bearing bodies around the borehole wall by using the advanced water exploration borehole in the heading roadway, which avoids the “one’s opinion in one hole” because the
Jiulong CHENG, Chenglin JIANG, Yao LI, Renxi BAI   +3 more
doaj   +1 more source

A Novel Electromagnetic Transient Simulation Method of Large-Scale AC Power System With High Penetrations of DFIG-Based Wind Farms

IEEE Access, 2022
With the ever-expanding deployment of renewable energy sources (RESs), the short-time transients have more significant impacts on shaping the characteristics of large power grids.
Yifeng Dong, Jianbo Guo, Shihong Miao, Junxian Hou, Ji Han, Shicong Ma, Tiezhu Wang   +6 more
doaj   +1 more source

The influence of electromagnetic field models on the damper winding loss and heat calculation results of tubular hydro‐generator

Electronics Letters
This study investigates the effect of electromagnetic field models on tubular hydro‐generator damper winding losses and heat calculations using an on‐site 36‐MW such generator as an example.
Meng‐qi Xu, Wen‐hao Hu, Zhi‐ting Zhou, Zhen‐nan Fan   +3 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Electromagnetic Transient Modeling and Simulation of Power Converters Based on a Piecewise Generalized State Space Averaging Method

IEEE Access, 2019
Large-scale photovoltaic (PV) power plants connected to the grid leads to the complex calculations in modeling and simulation of the power system, especially in the electromagnetic transient progress.
Lei Wang, Xinchang Deng, Pingping Han, Xianjun Qi, Xiaolong Wu, Mengdi Li, Haihua Xu   +6 more
doaj   +1 more source

Transient Electromagnetic 1-Dimensional Inversion Based on the Quantum Particle Swarms Optimization-Smooth Constrained Least Squares Joint Algorithm and Its Application in Karst Exploration

Advances in Civil Engineering, 2022
Before the construction of the bridge bored pile in the karst area, geological conditions of the excavation area should be investigated. In order to avoid the karst caves in underground space making adverse impacts on the construction, bearing capacity ...
Xue Liu, Chunwei Pan, Fangkun Zheng, Ying Sun, Qingsong Gou   +4 more
doaj   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source