Results 41 to 50 of about 1,321 (186)

Impulsive Flashover Characteristics and Weibull Statistical Analysis of Gas-Solid Interfaces With Varying Relative Humidity

IEEE Access, 2020
This paper informs on the flashover strength of three materials: Delrin (polyoxymethylene), HDPE (high-density polyethylene) and Ultem (polyetherimide) with smooth surface finishes, in zero-grade air at -0.5, 0 and 0.5 bar gauge, and at <; 10%, ~50 ...
Ruairidh W. Macpherson, Mark P. Wilson, Igor V. Timoshkin, Scott J. Macgregor, Martin J. Given   +4 more
doaj   +1 more source

Study on the Coupled Effects of High‐Speed Airflow and Charged Sand on Power‐Frequency Discharge Characteristics of Conductor–Tower Gaps in Strong Wind–Sand Environments

High Voltage, EarlyView.
ABSTRACT Strong wind–sand weather in Xinjiang threatens power grid safety by increasing transmission line tripping risks. Existing studies focus on sand polarization but neglect the coupled influence of high‐speed airflow and charged sand on gap discharge characteristics.
Jianghai Geng, Yang Wang, Ping Wang, Yang Lu, Songsong Zhou, Yujian Ding, Xiaojun Zhang, Wenbing Zhuang, Yu Su   +8 more
wiley   +1 more source

Calculation model for improving the flash over voltage of composite insulator in extreme environment of the novel power system

Diance yu yibiao
In order to achieve the optimized energy allocation, long-distance and high-capacity transmission is becoming more common in the novel power system.
LIU Xingting, WANG Nan, MA Jing, WANG Xinwei, QIAO Xinhan, ZHU Zishang   +5 more
doaj   +1 more source

Studying AC Flashover Performance of Suspension Insulators Under Natural Cold Fog and Wet Deposition Conditions

IEEE Access, 2020
The electrical performance of insulators under comprehensive conditions including low air pressure, pollution and icing, is an important basis for the selection of external insulation.
Bingbing Dong, Zelin Zhang, Nianwen Xiang, Changsheng Gao, Jiale Song, Yu Gu   +5 more
doaj   +1 more source

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

High Voltage, 2022
The surface flashover is affected by many factors, such as surface roughness, nanofillers and chemical functional groups. In this research study, polyamide mesh was utilised as a scaffold to systematically study the synergistic effect of micro structure ...
Qing Xie, Guoshuang Ma, Peng Wang, Xuesong Zhang, Jiyuan Yan, Zhaochen Liu, Fangcheng Lü   +6 more
doaj   +1 more source

Experimental Study on Disintegration Characteristics of Water Droplets in Icicle‐Flat Plate Gap Beyond Critical Discharge Voltage

High Voltage, EarlyView.
ABSTRACT The disintegration behaviour of ice‐melting droplets aggravates the discharge risk of ice‐covered insulators and the disintegration characteristics of droplets at applied voltages exceeding the critical discharge voltage lack in‐depth study.
Lin Yang, Xinyang Gou, Xingkun Hu, Jiabao Ding, Yanpeng Hao, Licheng Li, Hao Li   +6 more
wiley   +1 more source

Surface Flashover of Silicon

Eighth IEEE International Conference on Pulsed Power, 2005
We have previously reported the results of experiments based on high-speed shutter and streak photography which show clearly that in surface flashover of silicon in a vacuum ambient the current flows primarily in the silicon, not in the ambient.
F.E. Peterkin, P.F. Williams, T. Ridolfi, B.J. Hankla, L.L. Buresh   +4 more
openaire   +3 more sources

Temperature Extraction Scheme for Composite Insulator Core Rod Sheath of Overhead Transmission Lines Based on Oriented Bounding Boxes

High Voltage, EarlyView.
ABSTRACT Unmanned Aerial Vehicle (UAV) inspection of overhead transmission line composite insulators allows for the rapid acquisition of large amounts of infrared images of insulators in service, which can be used to analyse their operational status. However, efficiently and accurately analysing these images remains a challenge.
Zhenan Zhou, Xinzhe Yu, Yu Deng, Chen Gu, Kun Zhang, Zheyuan Liu, Songsong Zhou, Yueneng Xu   +7 more
wiley   +1 more source

Investigation of the Partial Discharge Inception and Flashover With IEC‐Based Comparative Tracking Index Electrodes and Comparison With Homogeneous and Inhomogeneous Electric Fields at Varying Pressures for Aerospace Applications

High Voltage, EarlyView.
ABSTRACT For designing aeronautical components, the creepage distance is usually estimated by considering the pollution level and the dielectric material group as defined by the standard IEC 60664‐1. The material group is expressed by the comparative tracking index (CTI) performed at atmospheric pressure following the standard IEC 60112.
Somya Anand, Mohammed El Amine Slama, Pierre Henrard, Michaël Darques, Solomon Berihu Araya   +4 more
wiley   +1 more source

Comparative Analysis of Machine Learning Algorithms for Automated Hydrophobicity Classification in Composite Insulators Using Contour Features

High Voltage, EarlyView.
ABSTRACT This study presents a comparative analysis of six machine learning algorithms for automated hydrophobicity classification in composite insulators using contour‐based image features. A robust image‐processing pipeline was developed to extract statistical features from water droplet patterns on insulator surfaces, enabling objective ...
Salihu Salisu, Christos Zachariades, Aliyu Abubakar   +2 more
wiley   +1 more source