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 +4 more
wiley +1 more source
Mechanism of saline deposition and surface flashover on high-voltage insulators near shoreline:mathematical models and experimental validations [PDF]
, 2019 This paper deals with sea salt transportation and deposition mechanisms and discusses the serious issue of degradation of outdoor insulators resulting from various environmental stresses and severe saline contaminant accumulation near the shoreline.
Chaudhary, Muhammad Akmal +2 more
core +2 more sources
IEEE Journal of the Electron Devices Society, 2018 The development of Gallium arsenide photoconductive semiconductor switch has been hampered by the surface flashover. The surface flashover threshold with the laser excitation is far lower than the one without the laser excitation.
Shaoqiang Wang, Wei Shi
doaj +1 more source
The influence of surface currents on pattern-dependent charging and notching [PDF]
, 1998 Surface charge dissipation on insulator surfaces can reduce local charging potentials thereby preventing ion trajectory deflection at the bottom of trenches that leads to lateral sidewall etching (notching). We perform detailed Monte Carlo simulations of
Giapis, Konstantinos P. +1 more
core +1 more source
Feasibility study on application of microwave radiometry to monitor contamination level on insulator materials [PDF]
, 2016 This paper introduces a novel method for monitoring contamination levels on high voltage insulators based on microwave radiometry. Present contamination monitoring solutions for high voltage insulators are only effective in predicting flashover risk when
Jiang, Y. +5 more
core +2 more sources
Fire design in safety engineering: likely fire curve for people’s safety [PDF]
, 2018 The present study analyses fire design settings according to Fire Safety Engineering (FSE) for the simulation of fire in civil activities and compares these simulations developed using natural and analytic fire curves.
Grossi, Luca +4 more
core +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 +6 more
doaj +1 more source
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 +3 more
doaj +1 more source
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 +5 more
doaj +1 more source
Monitoring insulator contamination level under dry condition with a microwave reflectometer [PDF]
, 2015 —Build-up of surface contamination on high voltage insulators can lead to an increase in leakage current and partial discharge, which may eventually develop into flashover. Conventional contamination level monitoring systems based on leakage current,
Jiang, Yan +5 more
core +1 more source