Results 51 to 60 of about 884 (177)

Review of Treatments for Suppressing Surface Charge Accumulation and Enhancing Surface Flashover Voltage

CSEE Journal of Power and Energy Systems
The focus of this paper is to provide a comprehensive review of various insulation performance improvement methods for vacuum-solid and compressed air-solid interfaces.
Jixing Sun, Huili Wang, Jingquan Zheng, Zongze Li, Jindong Huo, Changwang Guo, Yifei Wang, Peng Xiao, Shakeel Akram, Dehao Qin   +9 more
doaj   +1 more source

Luminescence evolution from alumina ceramic surface before flashover under direct and alternating current voltage in vacuum

AIP Advances, 2016
The luminescence evolution phenomena from alumina ceramic surface in vacuum under high voltage of direct and alternating current are reported, with the voltage covering a large range from far below to close to the flashover voltage. Its time resolved and
Guo-Qiang Su, Yi-Bo Wang, Bai-Peng Song, Hai-Bao Mu, Guan-Jun Zhang, Feng Li, Meng Wang   +6 more
doaj   +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

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

A Review and Prospect of Appearance Defect Detection Methods for High Voltage Equipment Based on Vision Large Models

High Voltage, EarlyView.
ABSTRACT High voltage equipment, as a core component of power systems, plays an indispensable role in ensuring the reliability of power supply through its safe and stable operation. Traditional visual defect detection for high voltage equipment, however, often relies on manual inspection and experience‐based judgement, which struggles to meet the ...
Zhenbing Zhao, Shuo Feng, Teng Ma, Chenkang Tang, Wenlong Liao, Yixuan Huang, Yongjie Zhai, Wenqing Zhao   +7 more
wiley   +1 more source

Forecasting Flashover Parameters of Polymeric Insulators under Contaminated Conditions Using the Machine Learning Technique

Energies, 2020
There is a vital need to understand the flashover process of polymeric insulators for safe and reliable power system operation. This paper provides a rigorous investigation of forecasting the flashover parameters of High Temperature Vulcanized (HTV ...
Arshad, Jawad Ahmad, Ahsen Tahir, Brian G. Stewart, Azam Nekahi   +4 more
doaj   +1 more source

INVESTIGATION OF FLASHOVER VOLTAGE FOR EPOXY COMPOSITES FILLED WITH VARIOUS FILLERS

International Journal of Engineering Technologies and Management Research, 2020
Minerals fillers such as Magnesium Oxide (MgO), Alumina Trihydrate (ATH), Calcium Carbonate (CaCo3), and Silica (SiO2) were used to produce epoxy composite for high and medium voltage in electrical application. Effects of types and percentage weight of filler on flashover voltage properties of epoxy resin were determined.
Mohamed. T. M. Mousa, Loai. S. Nasrat, Ziad. M. Ali   +2 more
openaire   +2 more sources

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

Application Status and Development Trends of DC Ice‐Melting Devices in China's Power Grid

IET Smart Energy Systems, EarlyView.
This paper summarises the development history and engineering application status of DC ice‐melting devices (DCIMD) in China, analyses the principles, advantages, disadvantages and adaptability of mainstream topologies and discusses the key problems and corresponding improvement directions.
Ming Lei, Tianlong Zhang, Zhenglin Li, Jian Wang, Tao Zhang, Peng Wang, Ruiqi Zhan   +6 more
wiley   +1 more source

Effect of AC Pre-Charging of Epoxy Insulator on Flashover Properties in Eco-Friendly Binary Gas Mixtures

Energies
Metal particles and surface charge accumulation are considered the key factors that could trigger unexpected flashovers of insulators equipped in gas-insulated switchgear (GIS).
Jian Guan, Guohui Han, Qifeng Shang, Xiaohu Qi, Zhiying Wang, Yu Gao   +5 more
doaj   +1 more source