Results 31 to 40 of about 5,098 (229)

Study on Insulator Flashover Voltage Gradient Correction Considering Soluble Pollution Constituents

Energies, 2016
Natural polluted insulator surfaces are always coated with various kinds of soluble constituents, and those constituents affect flashover performance differentially.
Dongdong Zhang, Zhijin Zhang, Xingliang Jiang, Zhongyi Yang, Jiayao Zhao, Yongfu Li   +5 more
doaj   +1 more source

Feature extraction and classification of surface discharges on an ice-covered insulator string during AC flashover using gray-level co-occurrence matrix

Scientific Reports, 2021
This study focuses on the feature extraction and classification of surface discharges of ice-covered insulator strings during process of alternating current flashover.
Yong Liu, Qiran Li, Boxue Du, Masoud Farzaneh   +3 more
doaj   +1 more source

Unraveling the “U-Shaped” Dependence of Surface Flashover Performance on the Surface Trap Level

IEEE Access, 2019
The effects of surface traps on surface flashover remain controversial. To clarify the relation between surface flashover and surface trap level, in this work, the surface trap level of epoxy composites was modified by nanoparticles incorporation ...
Shengtao Li, Zhen Li, Yin Huang, Haoming Xu, Farooq Aslam, Daomin Min, Weiwang Wang   +6 more
doaj   +1 more source

Flashover Performance and Process of Suspension Insulator Strings Artificially Covered with Snow

Energies, 2018
Snow accumulates on the surface of insulator string, causing a decrease in its electrical performance, seriously threatening the reliable operation of the power grid.
Yuyao Hu, Sihua Guo, Richang Xian, Xingbo Han, Zhongyi Yang, Ying Wu   +5 more
doaj   +1 more source

Short-term Breakdown and Long-term Failure in Nanodielectrics: A Review [PDF]

, 2010
Nanodielectrics, which are concentrated in polymer matrix incorporating nanofillers, have received considerable attention due to their potential benefits as dielectrics.
Yunxa Zhang, Yin, Guilai, Zhang, Yunxia, Guilai Yin, Suna Bai, Qingquan Lei, Jianying Li, Chen, George, Li, Jianying, Li, Shengtao, Bai, Suna, G. Chen, Zhong, Lisheng, Shengtao Li, Lisheng Zhong, Lei, Qingquan   +15 more
core   +1 more source

Displacement Current and Surface Flashover [PDF]

, 2007
High-voltage vacuum insulator failure is generally due to surface flashover rather than insulator bulk breakdown. Vacuum surface flashover is widely believed to be initiated by a secondary electron emission avalanche along the vacuum-insulator interface.
G. J. Caporaso, Harris, J. R., Blackfield, D., Caporaso, G. J., Chen, Y. J., J. R. Harris, Y.-J. Chen, D. Blackfield   +7 more
core   +1 more source

Optimized Design of Shed Parameters for Polluted Hollow Porcelain Insulators at High Altitude

IEEE Access, 2023
The pollution flashover problem of hollow insulators, one of the primary faults in substations, can be improved by optimizing the shed parameters. Combining the artificial pollution test and electric field simulation, this paper studies the optimal shed ...
Ziwei Qiu, Yong Sun, Yanjie Cui, Zhijin Zhang, Yuhao Liu, Xuye Chen, Yufan Wu, Chao Li, Lin Wang, Zhengfei Lei   +9 more
doaj   +1 more source

The Effect of a Vertical Electric Field on the Surface Flashover Characteristics of a Bushing Model

Energies, 2018
High-voltage bushings play a crucial role in energy conveyance. Their specialized electric structure makes the bushing more vulnerable to surface discharge.
Mingxi Zhu, Liming Wang, Fanghui Yin, Masoud Farzaneh, Hongwei Mei, Lu Wen   +5 more
doaj   +1 more source

Effects of surface roughness on DC and AC surface flashover performances of epoxy composites in SF6/N2 mixtures [PDF]

AIP Advances
Surface flashover of the epoxy insulator is one of the urgent insulation issues in SF6/N2 filled gas-insulated equipment, causing irreversible insulation failure and harming the secure operation of power systems. However, the effects of surface roughness,
Lei Zhang, Guobao Zhang, Hengyang Zhao, Wei Yang, Jianlin Li, Taiyun Zhu, Zhengyang Wu, Wenhu Han, He Gao, Zhen Li   +9 more
doaj   +1 more source

Atmospheric-pressure plasma jet deposition of bumpy coating improves polypropylene surface flashover performance in vacuum

, 2020
Polypropylene (PP) with low leakage current and high mechanical strength is a promising candidate for recyclable vacuum insulation applications, but its surface flashover voltage is low. Advantageously to widely used technologies such as fluorination and
Kong, Fei, Yan, Ping, Zhang, Cheng, Shao, Tao, Zhang, Shuai, Dong, Pan, Ostrikov, Kostya Ken, Cheng, Xian, Zhang, Penghao   +8 more
core   +1 more source