Results 111 to 120 of about 6,433 (219)

Threshold Currents of Vacuum Arcs With Tungsten and Copper Cathodes

High Voltage, EarlyView.
ABSTRACT This paper presents the results of an experimental study aimed at determining the threshold current for triggering a vacuum arc discharge, the probability of arc ignition and the average arc operation time depending on the current for tungsten and copper electrodes.
P. S. Mikhailov, I. L. Muzyukin, I. V. Uimanov, D. L. Shmelev, S. A. Barengolts   +4 more
wiley   +1 more source

Influence of nanofluid on performance improvement of dielectric properties and dissolved gases in oil-immersed power transformers. [PDF]

Discov Nano
Suboor A, Masood A, Khan AA, Urooj S, Zuberi MU, Khan SA, Rahman O, Parveen S, Bakhsh FI.   +8 more
europepmc   +1 more source

Arc Resistance Enhancement of Converter Transformer Tank Through Structural Improvements: Simulation and Experimental Validation

High Voltage, EarlyView.
ABSTRACT Currently, limited research exists on the structural response and protection methods of the converter transformer tank for ± 800 kV ultra‐high voltage direct current transmission project to high energy arc faults. This research investigates the dynamic response and the vulnerable areas of the ultra‐high voltage converter transformer under the ...
Ke Wang, Shuqi Zhang, Yikun Zhao, Yichen Wang, Zongliang Zhang, Jinhua Zhang   +5 more
wiley   +1 more source

The Failure of Voltage Divider Induced by Insulating Material Degradation Under Coupling Effect of High-Frequency Field and Temperature. [PDF]

Materials (Basel)
Li X, Zhang C, Liu Z, Song J, Tian H, Xie Q, Zhang Z, Li S.   +7 more
europepmc   +1 more source

An Improved Fast Computational Method for Vibration Characteristic Analysis of Dry‐Type Iron Core Reactor

High Voltage, EarlyView.
ABSTRACT Structural mechanics field simulation plays a critical role in the vibration characteristic analysis of electrical equipment. Existing structural field analysis of equipment based on numerical simulation faces challenges such as convergence difficulties and prolonged computational time, failing to meet the demand for real‐time prediction of ...
Wanqing Wang, Caibo Liao, Bang Liu, Kai Li, Wenyu Liu, Zhaoguo Li, Xianfa Tian   +6 more
wiley   +1 more source

Formic acid-sulfide synergistic aging kinetics and nanometer titanium dioxide modification mechanism in oil-immersed transformer insulation system. [PDF]

PLoS One
Gao Y, Li Z, Cheng P, Zhang Y, Wei X, Jia P.   +5 more
europepmc   +1 more source

Dynamic Behaviour of Bubbles in Oil Under Electrothermal Ageing

High Voltage, EarlyView.
ABSTRACT During long‐term operation of converter transformers, the internal oil–pressboard insulation undergoes irreversible degradation. Partial discharge in the weakened insulation will cause the formation of a large number of bubbles in the insulating oil.
Hongbin Wu, Zhaoyang Kang, Ze Li, Zhongyu Zhao, Shuqi Li, Fuqiang Ren, Hongshun Liu, Qingquan Li   +7 more
wiley   +1 more source

Power transformer online monitoring and state assessment method based on 2DCNN-BiLSTM multi-source feature fusion. [PDF]

PLoS One
Zhang W, Liu L, Chen C, Wei S, Zhang Y, Huo Z, Li D, Yin H.   +7 more
europepmc   +1 more source

Development of ± 550 kV DC GIS Basin Insulator

High Voltage, EarlyView.
ABSTRACT The basin insulator is a core component of the insulation system for ± 550 kV gas‐insulated switchgear (GIS). This paper, using a finite element method for multi‐physics simulations of electric–thermal coupling, determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators.
Shaohua Cao, Chengwei Jing, Siqiong Zhang, Zuodong Liang, Zehao Zhang, Fangwei Liang, Yong Yang, Geng Chen, Jinliang He, Chuanyang Li   +9 more
wiley   +1 more source

An intelligent life prediction approach employing machine learning models for the power transformers. [PDF]

Sci Rep
Nezami MM, Ahmad S, Salamat A, Ansari MF, Alsubait T, Taha IBM, Ghatasheh M, Mohamed Abdelwahab SA, Flah A.   +8 more
europepmc   +1 more source