0000000000462768

AUTHOR

S. Franchi Bononi

showing 3 related works from this author

Effect of Polarity Reversal on the Partial Discharge Phenomena

2020

In the field of High Voltage Direct Current (HVDC) transmission, the space charge accumulation phenomenon and the Partial Discharges (PD) phenomena are considered the main causes of dielectric ageing. During the years, the degradation effect of both phenomena under constant DC stress has been widely studied by several researchers. In case of polarity reversal, typically carried out to control bi-directional power flow between interconnected High Voltage transmission systems, the space charge movement may not synchronously follow the electric field polarity. This could make the moment of reversing polarity a very critical one, where space charge injected during preceding polarity produces hi…

010302 applied physicsPolarity reversalMaterials scienceHVDCPolarity (physics)polarity reversalHigh voltage02 engineering and technologyMechanicsDielectric021001 nanoscience & nanotechnology01 natural sciencesSpace chargeElectric fieldPartial discharge0103 physical sciencesPartial dischargePryCamHigh-voltage direct current0210 nano-technologyAir void
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Different Measurement Setup Configurations for Space Charge test in Mini Cable Specimens with the PEA Method

2019

Under DC stress, the space charge accumulation is believed one of the most responsible of dielectrics ageing. For this reason, due to the increase of the HVDC transmission, a recommendation has been proposed. The latter want to introduce the space charge measure, with the PEA method, in cable specimens during the prequalification or type tests. Considering the several issues related to this kind of measures the aim of the proposed work is find a measurement setup for mini cable specimens which is able to provide a clear and clean space charge profile. Therefore, different tests have been made in this work. In particular, the length of the cable specimen, the width of the pulse electrodes, a…

mini cable010302 applied physicsMaterials sciencePEA method020209 energyAcoustics02 engineering and technology01 natural sciencesMeasure (mathematics)Space chargeSpace chargePulse (physics)Stress (mechanics)Settore ING-IND/31 - ElettrotecnicaLength measurementCable specimenPEA for cableTransmission (telecommunications)Position (vector)0103 physical sciencesElectrode0202 electrical engineering electronic engineering information engineering2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena (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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