Results 41 to 50 of about 799 (256)

Structure Optimization of Well-distributed High Temperature Insulation System Oil-immersed Distribution Transformer

工程科学与技术, 2017
:With the rise of safety,economic and environmental protection requirements of power systems,replacingthe insulation materials to enhance the performance of oil-immersed distribution transformer is high needed.Based on the classical theory of heat ...
ZHAO Lihua, LIU Danhua, ZHANG Zongxi, LIU Rui, JIANG Wei, WANG Zhong   +5 more
doaj  

LIGHTNING IMPULSE MODELING AND SIMULATION OF DRY-TYPE AND OIL-IMMERSED POWER- AND DISTRIBUTION TRANSFORMERS

Journal of Energy : Energija, 2022
This paper presents in detail numerical methods and techniques for lightning impulse (LI) modeling and simulation of power and distribution transformers. The modeling methods are based on equivalent circuits of transformer winding entities resulting from the initial winding discretization determined by the required accuracy.
Smajic, Jasmin, Obrist, Roman, Rüegg, Martin, Cranganu-Cretu, Bogdan, Roy, Carlos, Weber, Benjamin, Rahimpour, Ebrahim   +6 more
openaire   +3 more sources

An Electrowetting Pump

Advanced Functional Materials, EarlyView.
A tubular electrowetting pump moves alternating droplets through a millimeter‐wide channel in discrete, reversible steps, functioning as a fluidic stepper motor. With no moving parts and electrodes insulated from the liquid, it delivers silent, accurate flow. Flexibility allows the pump to be woven directly into textiles for wearable, medical, and soft‐
Robert Hennig, Herbert Shea
wiley   +1 more source

Multidimensional Cellular Micro‐Compartments to Model Invasive Lobular Carcinoma Dormancy

Advanced Healthcare Materials, EarlyView.
Invasive lobular carcinoma (ILC) is an understudied subtype of breast cancer that is susceptible to late recurrences. In this study, micro‐compartmentalization techniques spanning multiple dimensions, including 2D, pseudo‐3D, and 3D, are integrated to uncover the mechanisms underlying ILC dormancy, revealing the central role of p27Kip1.
Xilal Y. Rima, Sarmila Majumder, Divya S. Patel, Chunyu Hu, Hong Li, Xin Huang, Kim Truc Nguyen, Jacob Doon‐Ralls, Chiranth K. Nagaraj, Mangesh D. Hade, Setty M. Magaña, Eswar Shankar, Xiaoli Zhang, Daniel G. Stover, Bhuvaneswari Ramaswamy, Eduardo Reátegui   +15 more
wiley   +1 more source

Simulation analysis method of hot spot temperature of oil-immersed transformer based on temperature field calculation

Diance yu yibiao
With the construction of large-capacity pumped storage power plants, the problem of transformer winding overheating become more prominent. Given the technical shortage of the real-time monitoring for hot spot temperature of oil-immersed transformers in ...
PAN Wenxia, CHEN Xingchi, ZHAO Kun, GAO Congchuang   +3 more
doaj   +1 more source

A Method for Fans’ Potential Malfunction Detection of ONAF Transformer Using Top-Oil Temperature Monitoring

IEEE Access, 2021
The fan is one of the key components of the power transformer cooling system. The operating condition of fans determines transformers’ internal temperature rise and long-term reliability.
Lujia Wang, Wanwan Zuo, Zhi-Xin Yang, Jianwen Zhang, Zhenlu Cai   +4 more
doaj   +1 more source

Concept and application of Digital Twins for oil-immersed power transformers

Zbornik radova Elektrotehnicki institut Nikola Tesla
This paper provides a literature review and establishes the state-of-the-art in the concept and application of Digital Twin (DT) technology to power transformers. The introductory sections focus on the evolving definition and universal concepts of DT, independent of specific fields of application, as well as the goals of Industry 4.0 and the ...
Uroš Radoman, Filip Kilibarda, Nenad Kartalović, Nikola Miladinović, Vladimir Polužanski, Valentina Vasović, Branko Pejović, Aleksandar Žigić, Jelena Lukić   +8 more
openaire   +2 more sources

Stability of Medicinal Nanoemulsions to Spaceflight: Insights From the StarMed Experiment

Advanced Healthcare Materials, EarlyView.
Chitosan‐coated melatonin nanoemulsions (MN) recovered from a sounding rocket mission preserve droplet size and controlled‐release behavior, whereas uncoated nanoemulsions show ageing‐driven droplet growth and increased accessible drug fraction. Simple polymer coatings thus enhance the flight resilience of liquid space medicines under cumulative launch
Modupe Adebowale, Nguyen Van Duc Long, Philip M. Williams, Jens Hauslage, Volker Hessel   +4 more
wiley   +1 more source

Predicting transformer temperature field based on physics‐informed neural networks

High Voltage
The safe operation of oil‐immersed transformers is critical to the safety and stability of the power grid. As the operating time increases, the failure rate of oil‐immersed transformers shows an increasing trend, posing serious challenges to safe ...
Pengfei Tang, Zhonghao Zhang, Jie Tong, Tianhang Long, Can Huang, Zihao Qi   +5 more
doaj   +1 more source

Photoactive Tweezers

Advanced Materials, EarlyView.
A photoactive tweezers system based on photoactive colloids is developed and systematically investigated in this study. Through experimental and theoretical methods, we demonstrate that the photoredox reaction catalyzed by a dye‐sensitized TiO2 particle generates a strong positive phototaxis, enabling self‐entrapment in the beam center.
Jingyuan Chen, Qingxin Guo, Shiwei Zhang, Donghao Cui, Changjin Wu, Pei Xu, Wei Wang, Kai Lou, Binglin Zeng, Jinyao Tang   +9 more
wiley   +1 more source