Results 21 to 30 of about 2,280 (259)

Study on the Method of Calculating Temperature Rise of Transformer [PDF]

E3S Web of Conferences, 2020
The internal temperature of the transformer is a key parameter to measure the thermal state of the transformer. The service life of the transformer generally depends on the life of the insulating material, and high temperature is the main reason why ...
Li Tao, Du Xiaoping, Sun Xuewu, Song Yuanyuan   +3 more
doaj   +1 more source

Investigation of wave processes of transformer windings as a distributed electric circuit

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
Relevance of the work is caused by the need of localize the defects of the transformer windings at diagnosis. It is possible to determine the spatial location of the defects along the transformer winding only if the transformer is considered as a system ...
Yusup Niyazbekovich Isaev, Elena Startseva, Artyom Schekotuev   +2 more
doaj   +2 more sources

Research on Transformer Winding Deformation and Winding Resistance

DEStech Transactions on Environment, Energy and Earth Science, 2016
In this paper, the influence of transformer winding deformation on the equivalent electrical parameters is studied, and the proximity effect and skin effect caused by AC current in the wire are simulated. It is verified that the current distribution will be affected by the proximity effect and skin effect.
Chen Ling, Puxin Shi, Yusheng Quan, Tiantang Xiang   +3 more
openaire   +2 more sources

Fault diagnostics in power transformer model winding for different alpha values

Journal of Electrical Systems and Information Technology, 2015
Transient overvoltages appearing at line terminal of power transformer HV windings can cause failure of winding insulation. The failure can be from winding to ground or between turns or sections of winding.
G.H. Kusumadevi, G.R. Gurumurthy
doaj   +1 more source

Comparisons of transformer thermal behaviours between conventional disc type and S disc type windings

IET Generation, Transmission & Distribution, 2022
Controlling the highest temperature in the windings is the primary objective of transformer thermal design to guarantee designed transformer thermal life expectancy.
Xiang Zhang, Qiang Liu, Zhongdong Wang, Mark Wilkinson   +3 more
doaj   +1 more source

Evaluation Method for Winding Performance of Distribution Transformer

Energies, 2021
In order to ensure the safe and stable operation of a power system, the performance evaluation of transformer windings after a short-circuit test can predict whether the windings are deformed in order to provide a useful reference for the operation and ...
Chunguang Suo, Yanan Ren, Wenbin Zhang, Yincheng Li, Yanyun Wang, Yi Ke   +5 more
doaj   +1 more source

Effect of DFPP on Ferroptosis in Peripheral Blood CD14+ Monocytes of Hyperlipidemic Patients Involving the ACSL4/LPCAT3/ALOX5 Pathway

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Hyperlipidemia is a major risk factor for atherosclerotic cardiovascular disease (ASCVD). Although statins are the cornerstone of lipid‐lowering therapy, their use may be limited in some patients by adverse effects. This study evaluated the possible impact of non‐drug treatment using double‐filtration plasmapheresis (DFPP) on CD14+
Yun Cheng, Lan Li, Qingmei Yang, Meipeng Wu   +3 more
wiley   +1 more source

Numerical calculation of the lightning transient voltage distribution on converter transformer winding based a dual winding model

The Journal of Engineering, 2019
The insulation co-ordination of converter transformer winding has a great influence on power system security. An equivalent circuit of a 500 kV converter transformer winding structure, including a LC equivalent network circuit and an ideal transformer in
Hongrui Jia, Xuezhong Liu, Shijin Tian, Lin Wang, Fei Gao   +4 more
doaj   +1 more source

MACHINE-TRANSFORMER UNITS FOR WIND TURBINES

Electrical Engineering & Electromechanics, 2016
Background. Electric generators of wind turbines must meet the following requirements: they must be multi-pole; to have a minimum size and weight; to be non-contact, but controlled; to ensure the maximum possible output voltage when working on the power supply system. Multipole and contactless are relatively simply realized in the synchronous generator
Panchenko, V. I., Tsyplenkov, D. V., Grebeniuk, A. M., Kyrychenko, M. S., Bobrov, O. V.   +4 more
openaire   +5 more sources

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source