Results 11 to 20 of about 1,321 (186)

Insulator fault feature extraction system of substation equipment based on machine vision

IET Networks, EarlyView., 2022
Abstract The artificial intelligence technology and intelligent automation are more and more widely used, the insulators play a supporting and insulating role in the operation of the grid. The use of machine vision inspection technology to detect insulator faults has become an inevitable trend of the times.
Keruo Jiang, Qiaoqun Xia, Lijun Ma, Xin Xu, Zhipeng Shao   +4 more
wiley   +1 more source

Novel dc flashover model for predicting flashover voltage of the iced insulators [PDF]

High Voltage, 2020
Abstract This work first proposes a novel flashover model based on the deduced residual resistance of the ice layer. The most important finding of the field icing tests is that the double‐layer ice‐melting water film exists on the inner and outer surfaces of the ice layer.
Caijin Fan, Xingliang Jiang, Yanbin Xie, Jianlin Hu, Zhijin Zhang, Qin Hu, Maoqiang Bi   +6 more
openaire   +2 more sources

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

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

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

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

Study on the relationship between the characteristics of water droplets on the shed of composite insulators and the pollution flashover voltage

Energy Reports, 2022
The anti-pollution flashover characteristic of composite insulators is the main indicators to evaluate their electrical performance, and the pollution flashover voltage can directly characterize the anti-pollution flashover characteristics of the ...
Wei Wang, Hailiang Lu, Chun Li, Yeqiang Deng, Lei Lan, Xishan Wen, Bing Luo, Wei Xiao   +7 more
doaj   +1 more source

Simulation Experiment on Discharge of Plastic Film Overlapping on UHVDC Transmission Lines

Zhongguo dianli, 2022
In order to study the discharge phenomena of plastic film overlapping on UHV DC transmission lines and explore the cause of flashover fault of a ± 800 kV UHV line, an experimental study is conducted on the flashover characteristics of plastic film with ...
Shenghui WANG, Ximing WANG, Xinghao DONG, Jun ZHOU   +3 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