Vasileios Zagkanas

Aristotle University of Thessaloniki | AUTH · School of Electrical and Computer Engineering

This study presents an experimental investigation of the positive lightning impulse dielectric strength of natural ester oil-based nanofluids with Fe2O3 nanoparticles. The effects of the concentration of the latter upon the distribution of the breakdown voltage of the nanofluid are quantified. Experiments were performed following the IEC 60897 proc...

A software application for the estimation of the corona inception field and voltage of typical ACSR transmission line conductors is presented. The software, developed in Python, runs as an executable Microsoft Windows application. It calculates the inception field and voltage of line conductors, based on a physical model that considers the ionizati...

Simulation software for estimating the basic inception characteristics of air and surface discharges, namely inception voltage and electric field, is presented. The simulation software, called CSPDI, utilizes an electrostatic solver using the Boundary Element Method and integrates physical modeling of partial discharge inception, based on the growt...

This paper presents how virtual prototyping and testing through Fieldscale SENSE can effectively support the product development process of automotive capacitive sensor systems. A capacitive sensor designed by Volkswagen Group Innovation to be placed at the steering wheel of a car, has been used as a case study. It is shown that a combination of el...

Corona inception field of line conductors is of major importance for assessing corona performance of overhead transmission lines. Using computational models that consider the ionization processes in corona discharge, the corona inception field of ACSR conductors typically utilized in overhead transmission lines is estimated. The interactive effects...

The overvoltage surges propagating along overhead line conductors are gradually distorted and attenuated because of impulse corona discharge. The extent of these effects is dependent mainly on the associated corona energy losses. The inception characteristics of impulse corona are most commonly assessed based on corona inception under steady or slo...

The overvoltage surges propagating along overhead line conductors are gradually distorted and attenuated because of impulse corona discharge. The extent of these effects is dependent mainly on the associated corona energy losses. The inception characteristics of impulse corona are most commonly assessed based on corona inception under steady or slo...

Negative DC corona on conductor bundles is experimentally investigated in the coaxial configuration. The dependence of the corona characteristics, namely inception voltage and current, thus also inception field and power losses, on bundle radius and number of conductors in the bundle is assessed. The corona inception voltage of conductor bundles is...

Corona discharge causes the attenuation and distortion of lightning and switching surges propagating along overhead transmission lines. Therefore, knowledge on surge corona characteristics is of great importance for insulation coordination studies. Most of the studies pertaining to corona effects on wave propagation on overhead line conductors negl...

Sieving Electrostatic Precipitator is a novel technology in the field of electrostatic precipitation where woven wire meshes are used for both particle charging and collection. Existing research shows that Sieving Electrostatic Precipitator is capable of capturing submi-cron particles more efficiently than conventional Electrostatic Precipitator. I...

Sieving Electrostatic Precipitator is a novel technology in the field of electrostatic precipitation where woven wire meshes are used for both particle charging and collection. Existing research shows that Sieving Electrostatic Precipitator is capable of capturing submicron particles more efficiently than conventional Electrostatic Precipitator. In...

The performance of projected-capacitive touch screens, as affected by metal mesh density and cover glass properties, has been investigated through simulations based on BEM method. Parametric simulations, including several finger or stylus positions, allowed for the assessment of important touch screen characteristics, such as mutual capacitance, si...

The salient characteristics of DC corona discharge on conductor bundles, namely corona inception voltage, corona current and the associated power losses, are experimentally investigated in the coaxial cylindrical electrode arrangement in air. The corona inception voltage increases markedly with increasing number of bundle conductors. There is an "...

Characteristics of negative DC corona threshold inception in the coaxial cylindrical electrode arrangement are investigated based on experimental data and computations on avalanche growth considering a field and atmospheric conditions dependent photoelectron emission coefficient. A transition region between glow and streamer regimes of inception of...

The conditions for threshold inception of positive DC corona in the coaxial cylindrical electrode arrangement are investigated. The establishment of the self-sustained corona discharge in glow or streamer form, as influenced by conductor radius and atmospheric conditions, is evaluated through detailed computations that consider space charge field e...

The effect of stranded conductor geometry on the salient characteristics of DC corona, namely corona inception voltage, corona conductance and the associated power losses is experimentally investigated in the coaxial cylindrical electrode arrangement in air. The number of strands of the conductor has a greater impact on the characteristics of posit...

The effect of the steepness of overvoltage surges propagating along overhead transmission lines on corona characteristics is of great importance for insulation coordination studies. Corona inception voltage on line conductors under fast-front overvoltages is commonly estimated through Peek’s empirical formula, which however was obtained for steady...

Knowledge on the effects of air density on corona discharge is of great importance for many practical applications, including overhead transmission lines. In the present study the salient characteristics of both positive and negative DC corona on 7-stranded conductors, namely the corona inception voltage, corona current and the associated power los...

Corona discharge has attracted much interest among researchers as it has a lot of applications in industry and a number of effects on power systems. Corona inception in the coaxial cylindrical electrode arrangement, which finds many practical applications, depends on the electric field strength around the inner conductor and on atmospheric conditio...

Corona discharge has attracted much interest among researchers as it has a lot of applications in industry and a number of effects on power systems. In the coaxial cylindrical electrode arrangement in air, simulating many practical applications, corona inception depends on the electric field strength around the inner conductor and on atmospheric co...

Corona discharge has many practical applications, thus it has been studied extensively experimentally as well through modelling in many electrode arrangements. In the present study a computational method for the estimation of the positive corona inception field strength in the coaxial cylindrical electrode arrangement in air is presented. It is bas...