0000000000639368

AUTHOR

M. De Araujo Andrade

showing 2 related works from this author

Different Space Charge Behavior of Materials Used in AC and DC Systems

2017

The aim of the present work is to evaluate the behavior, from the space charge accumulation phenomenon point of view, of three different XLPE specimens used as insulation materials in high voltage systems. Considering that under DC stress the charge accumulation is more relevant as compared to the AC case, in the specimens for DC applications additives are typically added. In this work, three different specimens are analyzed. One is a free additive sample used conventionally under AC stress and two others include different additives that are used under DC stress. In order to measure the space charge accumulation, the Pulsed Electro Acoustic (PEA) method has been employed. For each sample, t…

Work (thermodynamics)Materials sciencePEA method020209 energy02 engineering and technology01 natural sciencesSpace chargelaw.inventionStress (mechanics)lawElectric field0103 physical sciences0202 electrical engineering electronic engineering information engineeringPoint (geometry)AdditiveElectrical and Electronic EngineeringComposite material010302 applied physicsElectronic Optical and Magnetic MaterialCharge (physics)High voltageDC streSpace chargeCathodeSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - Elettrotecnica2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)
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Interpretation of PEA Output Signal in a Multilayer Specimen

2018

The aim of the present work is to evaluate the acoustic waves behavior within the Pulsed Electro-Acoustic (PEA) cell, in case of a multilayer specimen, in order to avoid misinterpretation of the output signal. Due to the reflection phenomenon of the acoustic waves travelling within the PEA cell, the output signal could be distorted. Because this aspect, for a given PEA cell with certain ground electrode and absorber thicknesses, depends on the sound velocity and thickness of the specimen under test, the latter must be carefully sized. For this aim, some useful relationships, that must be taken into account are given and described. In particular, a three layers sample simulating an air void …

Void (astronomy)Materials sciencePEA method020209 energyAcousticsElectronic Optical and Magnetic Material02 engineering and technologyAcoustic waveDielectricSpace chargeSpace chargeSettore ING-IND/31 - ElettrotecnicaMultilayer specimenElectrodeReflection phenomenon0202 electrical engineering electronic engineering information engineeringElectrical and Electronic Engineering
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