Surface Flashover and Charging on Insulators in Vacuum

Designation of an Indicator for flashover prediction of porcelain and glass insulators based on experimental tests.

Flashover of polluted insulators in contaminated areas is one of the most important factors influencing the operation of transmission and distribution lines and finally line outages. Therefore, it is essential to prevent and detect flashover in the insulators. Hence, utilizing the insulator status monitoring systems and predicting their functions have absorbed a lot of attention over the recent...

Prediction of Flashover Voltage of Insulators Using Low Voltage Surface Resistance Measurement

Increased surface flashover voltage in microfabricated devices

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Initiation Mechanism of Pulsed Surface Flashover along Silicon in Vacuum by Pre-breakdown Conduction and Photon Emission

Pre-breakdown (leakage) and breakdown currents and photon-emission associated with the currents, under impulse (0.36!10 IJ-S) voltage stress, along high purity (p>30 KQ em) silicon, with and without gold end contacts in vacuum (-lQ-6 Torr), are discussed. Three distinct phases leading to the breakdown condition are observed. These are one-carrier (hole) leakage current, two-carrier (electrons a...

Design of an artificial neural network for the estimation of the flashover voltage on insulators

This work attempts to apply an artificial neural network in order to estimate the critical flashover voltage on polluted insulators. The artificial eural network uses as input variables the following characteristics of the insulator: diameter, height, creepage distance, form factor and equivalent alt deposit density, and estimates the critical flashover voltage. The data used to train the netwo...