Results 21 to 30 of about 42,689 (263)

Effect of long-term fluorination on surface electrical performance of ethylene propylene rubber

High Voltage, 2019
To investigate the effect of fluorination on surface electrical performance of ethylene propylene rubber (EPR), four pieces of EPR specimens are prepared and fluorinated for different duration ranging from 120 min to 480 min.
Rujia Men, Zhipeng Lei, Tao Han, Davide Fabiani, Chuanyang Li, Chuanyang Li, Simone Vincenzo Suraci, Jian Wang   +7 more
doaj   +1 more source

Influence of frequency on the surface discharge characteristics of PEEK under positive repetitive square voltage

High Voltage, 2020
In this study, the surface discharge current pulses of polyetheretherketone (PEEK) material under positive repetitive square voltage in a nitrogen atmosphere are measured.
Zhuodong Yang, Xuebao Li, Xiangrui Meng, Xiangrui Meng, Zhibin Zhao, Pengyu Fu, Bin Zhai, Bin Zhai, Xiang Cui   +8 more
doaj   +1 more source

Numerical Calculations of Charging Threshold at GEO Altitudes With Two Temperature Non‐Extensive Electrons

Space Weather, 2023
Surface charging at geosynchronous altitude is one of the major concerns for satellites and spacecrafts. Spacecraft anomalies are often associated with extreme surface charging events, especially during substorms in which the GEO plasma is better modeled
Saba Javed, Nazish Rubab, Sadia Zaheer, Stefaan Poedts, Ghulam Jaffer   +4 more
doaj   +1 more source

Effects of volume and surface conductivity on the surface charge and electric field characteristics of the tri‐post insulator in SF6‐filled ± 500 kV DC‐GIL

IET Generation, Transmission & Distribution, 2023
Herein, the surface charge characteristics of a tri‐post insulator in a ± 500 kV direct current gas‐insulated transmission lines (DC‐GIL) filled with SF6 are thoroughly studied.
Xiaolong Li, Guangkuo Zhang, Chen Cao, Yan Shi, Jie Li, Wenzhi Chang   +5 more
doaj   +1 more source

Surface charges toolkit for gravity [PDF]

International Journal of Modern Physics D, 2020
These notes provide a detailed catalog of surface charge formulas for different classes of gravity theories. The present catalog reviews and extends the existing literature on the topic. Part of the focus is on reviewing the method to compute quasi-local surface charges for gauge theories in order to clarify conceptual issues and their range of ...
Ernesto Frodden, Diego Hidalgo
openaire   +2 more sources

Research on the Charging Process of LEO Spacecraft Surface Materials Based on Particle Transport Equations

IEEE Access
In order to find a simpler method to simulate the charging of spacecraft surface and further analyze the characteristics of the charging reaction of low-orbit spacecraft surface materials, this paper uses COMSOL to perform finite element analysis on the ...
Qianxin Fu, Xinyu Wang, Na Feng, Xu Tang, Guozhi Zhang, Guoguang Zhang   +5 more
doaj   +1 more source

Influence of moisture on the interface charge of oil–pressboard composite insulation under DC voltage

High Voltage, 2018
The distortion of the electric field in the oil–pressboard composite insulation caused by the accumulation of the interface charge is detrimental to both the insulation design and operation of converter transformers.
Bo Qi, Yanqiu Jiao, Chunjia Gao, Shuqi Zhang, Xiaolin Zhao, Chengrong Li   +5 more
doaj   +1 more source

Electrical discharge resistance of polymeric nanocomposites

IET Nanodielectrics, 2021
The trend of choosing insulating materials has changed in the past few decades, and a considerable shift has occurred from conventional ceramic to non‐ceramic insulating materials.
Srijib Banerjee, Shelly Saini, Shakthi Prasad D   +2 more
doaj   +1 more source

Charge accumulation characteristic on polymer insulator surface under AC voltage in air and C(4)F(7)N/CO(2) mixtures

High Voltage, 2020
Charge accumulation has always been a problem for the safe operation of gas insulated switchgear (GIS)/gas insulated transmission line (GIL) both under AC and DC.
Dayu Li, Guixin Zhang, Guixin Zhang, Tianyu Wang, Yicen Hou   +4 more
doaj   +1 more source

Improvement of partial discharge resistance of polypropylene under AC voltage by blending elastomer

IET Science, Measurement & Technology, 2023
This paper reports on the partial discharge (PD) erosion characteristics of polypropylene (PP)/elastomer blends where ethylene‐octene copolymer elastomer (EOC) and propylene‐based elastomer are involved.
Yu Gao, Jinjing Peng, Jing Li, Zheng Song, Xuri Xu, Tao Han, Meng Xiao   +6 more
doaj   +1 more source