Results 31 to 40 of about 884 (177)

Influence of zinc oxide nanoparticles on flashover voltage of unsaturated polyester resin-based composites for electrical insulators

Electrical engineering & Electromechanics
Introduction. Polyester-based composites are increasingly used in electrical applications for their insulation, mechanical, and thermal properties. Nanofillers have shown promise in enhancing the properties of polymer-based composites. Goal.
M. Rihan, A. Ghazzaly, A. H. Fahmy, A. A. Ebnalwaled, L. S. Nasrat   +4 more
doaj   +1 more source

Study on the dc flashover performance of standard suspension insulator with ring-shaped non-uniform pollution

High Voltage, 2018
Under dc electric field, pollution may be more easily deposited around insulator string caps and pins, distributing non-uniformly on its inner and outer parts, and presenting ring-like shape.
Zhijin Zhang, Jiayao Zhao, Dongdong Zhang, Xingliang Jiang, Yongfu Li, Bin Wu, Jian Wu   +6 more
doaj   +1 more source

Improvement of the Electrical Performance of Outdoor Porcelain Insulators by Utilization of a Novel Nano-TiO₂ Coating for Application in Railway Electrification Systems

Energies, 2023
The present study aimed to develop the electrical performance of outdoor insulators using a nano-TiO2 coating for railway electrification systems. The prototype design of porcelain insulators with normal coatings and using a nano-TiO2 coating is based on
Pichai Muangpratoom, Issaraporn Khonchaiyaphum, Wanwilai Vittayakorn   +2 more
doaj   +1 more source

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

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

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 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

Rare Lightning and Convection Characteristics During Two Successive Tornadoes in Southern China

High Voltage, EarlyView.
ABSTRACT Systematic investigations into lightning characteristics of tornado storms in China remain scarce. This study comprehensively analyses rare lightning behaviour and overshooting top characteristics for two successive tornadoes during a long‐lived supercell in southern China on 27 April 2024.
Fengquan Li, Jiangling Zhi, Yu Wang, Hantao Tao, Zhaoming Li, Shanqiang Gu, Zhe Li, Zeyu Zhang, Lei Zhang, Guoying Tang   +9 more
wiley   +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

A Thermal‐Dependent Conductivity Coating for Surface Charge and Electric Field Mitigation Under Electrothermal Coupling Field

High Voltage, EarlyView.
ABSTRACT The problem of gas–solid interface charge accumulation is an important reason for distorting the surface electric field and then inducing surface discharge. The temperature gradient distribution formed on the spacer during the operation of a gas‐insulated transmission line (GIL) will aggravate the surface charge accumulation, further ...
Jianyi Xue, Bowen Xing, Weiming Wang, Jianzhao Sang, Ning Yang, Tao Wen, Lijian Ding   +6 more
wiley   +1 more source