Results 1 to 10 of about 1,193 (116)

Study on the Impact of Contamination Containing High Proportions of Metals on the AC Flashover Characteristics of Insulators

High Voltage
In heavy metal industrial areas, the issue of insulation flashover caused by metal contamination on the external insulation of transmission lines has become increasingly prominent.
Zhijin Zhang, Dong Zeng, Bingbing Wang, Xingliang Jiang, Jianlin Hu, Qin Hu   +5 more
doaj   +2 more sources

Surface Flashover in 50 Years: III. Extreme Environments and Industrial Challenges

High Voltage
Modern high‐voltage electrical equipment operates in complex environments where surface conditions are subjected to multifaceted influences from electric fields, thermal gradients, contaminants, irradiation and other extreme environmental factors.
Zhen Li, Heng Zhang, He Gao, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li   +6 more
doaj   +2 more sources

Flashover Features in Aircraft Cargo Compartment at Low Pressure

Fire
The flashover mechanism in an aircraft cargo compartment under low pressure was investigated in this study. A series of fire experiments were conducted in a scale model of a one-quarter volume FAA standard aircraft cargo compartment at 96 kPa and 60 kPa.
Zitong Li, Yuanhua He, Jingdong Wang, Jiang Huang   +3 more
doaj   +1 more source

Creeping flashover characteristics improvement of nanofluid/pressboard system with TiO2 nanoparticles

AIP Advances, 2018
Creeping flashover easily occurs at the interface between oil and pressboard in transformer and thus results in outage of power transmission system. Investigations have shown that creeping flashover characteristics at oil/pressboard interface can be ...
Meng Huang, Lei Wang, Yang Ge, Yu-zhen Lv, Bo Qi, Cheng-rong Li   +5 more
doaj   +1 more source

Particle traps constructed on the insulator of conductive slip rings for surface flashover mitigation under particle adhesion

AIP Advances
The generation of abrasive particles is an unavoidable consequence of sliding electrical contact wear in conductive slip rings (SRs). The adhesion of abrasive particles to the insulators may lead to a decrease in flashover voltage, posing a risk to ...
Yang Yang, Haibao Mu, Yitong Yao, He Li, Guangqian Niu, Chengshan Liu, Zhiyuan Qian   +6 more
doaj   +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  

Experimental analysis of flashover characteristics for overhead power lines based on the lightning fractal model

电力工程技术
In recent years, a fractal model that can reflect the tortuosity and dispersion of lightning has been gradually used in the research of lightning shielding performance for overhead power lines, based on electrical geometric models and pioneering ...
ZHAN Jintao, YANG Tianyi, GUO Jun
doaj   +1 more source

Surface flashover in 50 years: II. Material modification, structure optimisation, and characteristics enhancement

High Voltage
Surface flashover is a gas–solid interface insulation failure that significantly jeopardises the secure operation of advanced electronic, electrical, and spacecraft applications.
Zhen Li, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li   +4 more
doaj   +1 more source

Numerical study on flashover in aircraft cargo under varying pressure and ventilation conditions

Journal of Safety Science and Resilience
A numerical simulation study was conducted to analyze flashover in a full-scale aircraft cargo compartment, utilizing FDS (Fire Dynamics Simulator) and PyroSim (visual modeling) software. The study aims to: (i) examine how varying heat release rates (HRR)
Xuhong Jia, Shupei Tang, Quanyi Liu
doaj   +1 more source

Improved flashover prediction for overhead lines: Considering ground stratification and insulation volt‐time characteristics

High Voltage
This paper presents an approach to accurately forecast the yearly occurrence of flashovers caused by lightning‐induced voltage in overhead power lines in the presence of layered ground.
Amin Foroughi Nematollahi, Behrooz Vahidi, Elaheh Saddat Ahmadi Mousavi   +2 more
doaj   +1 more source