Results 51 to 60 of about 98,856 (268)

PMU-voltage drop based fault locator for transmission backup protection [PDF]

, 2021
Local protection elements such as fuses and relays are the first protective mechanism to clear the fault and isolate the affected part of the power grid.
Chavez, Jose J. (author), Guardado, JL, Popov, M, Kumar, NV, Veerakumar, Nidarshan (author), Palensky, P. (author), Rueda, J, Palensky, P, Azizi, S, Guardado, Jose L. (author), Terzija, Vladimir (author), Azizi, Sadegh (author), Terzija, V, Rueda, José L. (author), Chavez, JJ, Popov, M. (author)   +15 more
core   +1 more source

Influence of Flexibilizers on the Thermal and Combustion Properties of Soundproof Enclosures in Ultrahigh Voltage Converter Transformer Equipment

Fire
Soundproof enclosures are essential components in ultra-high voltage converter transformer equipment. However, conventional designs pose considerable fire risks, as they may impede fire suppression efforts in case of equipment failure. This study adopted
Jiaqing Zhang, Fengju Shang, Yi Guo, Wenlong Zhang, Yanming Ding   +4 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Experimental study on enhancing the foam spray range of compressed air foam nozzle

Journal of Safety Science and Resilience
As the core equipment in power systems, ultra-high voltage (UHV) transformers pose a high fire risk. The compressed-air foam spray nozzle is a novel end-release device that, due to its high efficiency and excellent suppression effect on oil-based fires ...
Fengju Shang, Jiaqing Zhang, Xin Liu, Yi Guo, Yunpeng Yang, Lilong Nie, Kaiyuan Li   +6 more
doaj   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Optimizing the roles of unit and non-unit protection methods within DC microgrids

, 2012
The characteristic behavior of physically compact, multiterminal dc networks under electrical fault conditions can produce demanding protection requirements.
Burt, Graeme, Norman, Patrick, Galloway, Stuart, Fletcher, Steven, Crolla, Paul   +4 more
core   +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

Structure optimal design of 500 kV dry-type air-core shunt reactor based on response surface method

AIP Advances
The hotspot temperature of the reactor is one of the important indices in reactor design, and the appropriate hotspot value can ensure that the reactor will not overheat failure and threaten the safety of the power system.
Yanjing Zhu, Jiajun Kou, Zhiyu Zhang, Gang Liu, Wei Hu, Liang Xie, Guangdong Zhou   +6 more
doaj   +1 more source

Effect of oil immersion on the horizontal flame spread over transformer insulating paperboard with different sizes

Case Studies in Thermal Engineering
Transformer oil and insulating paperboard are widely used in oil-immersed transformers and may be ignited in the event of device failure. The present study aims to investigate the effect of oil immersion on the horizontal flame spread over the ...
Yubiao Huang, Yi Guo, Fengju Shang, Jiaqing Zhang   +3 more
doaj   +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