Results 61 to 70 of about 732,564 (210)

Failure behavior of dielectric films for peaking capacitor subjected to surface flashover under nanosecond pulses

AIP Advances, 2023
The flashover failure and damage of polypropylene (PP) and polyester (PET) films under nanosecond current pulses were experimentally investigated.
Zhiqiang Chen, Jinru Sun, Ziyi Dong, Jiaxin Ren, Wei Jia, Fan Guo, Linshen Xie, Wei Wu, Xueling Yao   +8 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

Research on Hot-line Cleaning of Artificial Contaminanted Insulator Using High Pressure Hot Water Vapor

Gaoya dianqi, 2014
The hot-line cleaning of insulator contaminants has a great significance to prevent pollution flashover.The technique of hot-line cleaning insulator contaminants by water vapor is proposed in this paper.The flashover characteristics of insulator under ...
LE Zhenchun, ZHAO Wenbin, YANG Guoqing, FU Chenzhao, JI Shengchang   +4 more
doaj  

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

Study on the Amplification Factor of Ice‐Shedding Jump Height of Transmission Lines Under Ice–Wind Coupling

High Voltage, EarlyView.
ABSTRACT Ice accumulation on transmission lines poses a persistent threat to grid stability, yet precise technical guidance for the dynamic response during ice shedding under wind loads remains insufficient. In response to this issue, this study uses C++ to create a calculation program and obtains aerodynamic coefficients of ice‐covered conductors with
Guolin Yang, Linghao Wang, Xingliang Jiang, Zhijin Zhang, Jianlin Hu, Yutai Li   +5 more
wiley   +1 more source

Conductivity Analysis and Thermoelectric Behaviour of Larch Standing Trees Under Lightning Currents: Role of Moisture Distribution and Carrier Motion

High Voltage, EarlyView.
ABSTRACT The direct effects of lightning strikes on forest combustibles form the foundation for predicting lightning‐induced forest fires. Accurate assessment of lightning impact is hindered by limited knowledge of the conduction characteristics of standing larch trees.
Jinru Sun, Xiaomeng Liu, Shu Li, Duanzhou Peng, Xueling Yao, Xiaodong Liu   +5 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

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

Study on Raindrop Dynamic Behaviour and Its Impact on Insulator Flashover Characteristics Under Airflow Synergy

High Voltage, EarlyView.
ABSTRACT The synergistic effect of airflow on rainfall behaviour significantly impacts the flashover probability of insulators. This study combines experiments and simulations to investigate the influence of raindrop dynamic behaviour, shed structures and rainfall conditions on flashover characteristics under airflow conditions.
Keqi Huang, Xueqin Zhang, Song Xiao, Lirui Zhang, Yujun Guo, Guangning Wu   +5 more
wiley   +1 more source