Results 51 to 60 of about 6,201 (230)

AC Flashover Voltage Model for Polluted Suspension Insulators and an Experimental Investigation in Salt Fog

IEEE Access, 2020
In recent years, the electrical performance of polluted suspension insulators operating in coastal foggy regions has attracted wide attention because of the occurrence of flashover. Surface wetting by salt fog accretion increases the surface conductivity
Bingbing Dong, Zhu Zhang, Nianwen Xiang, Hejun Yang, Shuiqing Xu, Tingli Cheng   +5 more
doaj   +1 more source

Fabrication and operation of a two-dimensional ion-trap lattice on a high-voltage microchip [PDF]

, 2014
Microfabricated ion traps are a major advancement towards scalable quantum computing with trapped ions. The development of more versatile ion-trap designs, in which tailored arrays of ions are positioned in two dimensions above a microfabricated surface,
A Sørensen, B Gassend, C Ospelkaus, C Schneider, C Zipkes, D Leibfried, D Porras, D Stick, F Minert, F Rieutord, J Britton, J Chiaverini, J Labaziewicz, JD Siverns, JD Siverns, JI Cirac, JJ McLoughlin, JM Amini, JP Home, JW Britton, K Grujic, KR Brown, L Deslauriers, M Brownnutt, M Harlander, MD Hughes, MD Paine, MJ Biercuk, R Blatt, R Krpoun, R Raussendorf, R Schmied, RJ Clark, RRA Syms, S Kotler, S Narayanan, WK Hensinger, X-L Deng   +37 more
core   +2 more sources

Micro Partial Discharge Characteristics of SF6 Under DC Voltage

High Voltage, EarlyView.
ABSTRACT In gas‐insulated high‐voltage direct current (HVDC) devices, micro partial discharges (PD) caused by micro‐protrusions or surface roughness on conductors or enclosures may not cause immediate insulation system failure due to their weak discharge intensity.
Geng Chen, Jie Wang, Chuanyang Li, Cong Wang, Youping Tu   +4 more
wiley   +1 more source

Effect of inverted T arrangement on AC pollution flashover characteristics of insulator strings

High Voltage, 2019
The arrangement of insulator strings has an effect on its pollution flashover characteristics. A new arrangement of insulator strings, inverted T-type arrangement, is proposed in this study.
Xingliang Jiang, Xiaodong Ren, Han Wang, Xingbo Han, Conglai Bi, Zhiyu Li, Ledong Hou   +6 more
doaj   +1 more source

AC Volume Breakdown and Surface Flashover of a 4% Novec^TM 4710/96% CO₂ Gas Mixture Compared to CO₂ in Highly Nonhomogeneous Fields

Energies, 2020
AC pre-discharge currents, breakdown, and flashover voltage measurements are reported in a 10 mm needle-plane arrangement in a 4% NovecTM 4710/96% CO2 gas mixture and compared with CO2 for pressures up to 8.8 bar abs.
Houssem Eddine Nechmi, Mohammed El Amine Slama, Abderrahmane (Manu) Haddad, Gordon Wilson   +3 more
doaj   +1 more source

Dielectric Breakdown Characteristics of Biaxially Oriented Polypropylene Films: Surface Structures on Thickness Dependence

High Voltage, EarlyView.
ABSTRACT Film capacitors, essential for energy storage in power systems, benefit from reduced film thickness to increase capacitance and lower costs. While the inverse power law traditionally links higher electric strength with thinner films, its validity diminishes below a critical thickness.
Chuansheng Zhang, Chengyan Ren, Yu Feng, Yi Luo, Cheng Zhang, Tao Shao   +5 more
wiley   +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

Parametric and nonparametric identification of shell and tube heat exchanger mathematical model [PDF]

, 2012
Parametric and nonparametric models of a shell and tube heat exchanger are studied. Such models are very important because they provide information about controlling a system operation. Without the model, the control task would be difficult for tuning
Khaerudini, D. S., Mahzan, S., Sebayang, D., Untoro, P.   +3 more
core   +1 more source

Anisotropy in Dry‐Type Valve‐Side Bushings of Converter Transformer: Phenomena and Effects

High Voltage, EarlyView.
ABSTRACT The safe and stable working of dry‐type valve‐side bushings, important components of converter transformers, is essential. In recent years, poor design has led to several core breakdown, flashover and cracking failures. The bushing cores, composed of crepe paper and aluminium foil, exhibit significant anisotropic physical properties due to its
Gaoyi Shang, Xueyang Bai, Wanhao Shi, Jinzhong Li, Shuqi Zhang, Hao Tang, Xuandong Liu   +6 more
wiley   +1 more source

A Novel Model for Prediction of Flashover 150kV Polluted Insulator Based on Nonlinear Autoregressive External Input Neural Network

Protek: Jurnal Ilmiah Teknik Elektro
This study aims to use an artificial neural network to forecast the flashover voltage of a polluted high-voltage insulator. Practical tests were conducted on a high-voltage insulator to gather data for the neural network.
Mardini Hasanah, Novizon Novizon, Rusvaira Qatrunnada, Yusreni Warmi, Sitti Amalia, Herris Yamashika   +5 more
doaj   +1 more source