0000000000004844

AUTHOR

I. Troia

showing 6 related works from this author

Partial discharge detection and localization along medium voltage cables

2017

In the last years different partial discharge (PD) measuring techniques have been developed because PD diagnostic is the most widely tool to evaluate the insulation condition of a power cable. Recently non-conventional methods and sensors have been used in order to reach improved results in PD measurements. The purpose of this work is to perform measurements that allow to study the variation of pulses when they travel along a MV cable and to locate the pulse source through the time arrival difference of the pulses obtained from two sensors installed separately.

010302 applied physicsMaterials sciencebusiness.industryAcousticsElectronic Optical and Magnetic Material01 natural sciencesPulse (physics)PD measurementSettore ING-IND/31 - Elettrotecnica0103 physical sciencesPartial dischargeWirelessPower cablePD localizationPartial DischargeElectrical and Electronic EngineeringbusinessVoltage
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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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Pulsed Electro-Acoustic Method for specimens and cables employed in HVDC systems: Some feasibility considerations

2018

Recent experiments on the use of the PEA method for testing dielectric materials in specimens and comparison with a detailed model provide an insight of the phenomenon and suggest the need of adopting similar models also for cables. What is said is even more important considering the possible future adoption of the PEA methodology to test DC cables for Pre-Qualification and Type Tests. The use of an accurate model of the PEA cell used for testing specimens and related experiments prove that the thickness of the different parts composing the PEA setup is a basic element for providing accurate charge reading and interpretation of the phenomenon. Both simulation and experimental results, carri…

010302 applied physicsControl and OptimizationComputer science020209 energySample (material)Issues in PEA measurementMechanical engineeringEnergy Engineering and Power Technology02 engineering and technologyAcoustic wave01 natural sciencesSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaPulsed Electro-Acoustic methodComputer Networks and Communication0103 physical sciencesReflection phenomenon0202 electrical engineering electronic engineering information engineeringDC cableCharge accumulation
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Wireless partial discharge tracking on cross-linked polyethylene MV and HV cables

2018

Medium voltage (MV)/high voltage (HV) cable lines are high-value assets and require substantial costs for their installation or replacement. For this reason, the capability to assess the condition of cable lengths and accessories on site is of great importance. Cross-linked polyethylene (XLPE) insulation is extensively used for MV, HV, and extra-high voltage (EHV) class cables [1] thanks to its excellent voltage-endurance and thermomechanical properties. In particular, XLPE-insulated cables feature substantially lower losses, easier manufacturing and jointing procedures, better environmental compatibility, and higher operating temperature compared with impregnated paper cables, which lead t…

Materials sciencecross-linked polyethylene insulation01 natural scienceschemistry.chemical_compoundOperating temperaturepower cable testing0103 physical sciencesWirelessPower cablefault locationElectrical and Electronic Engineeringcable insulation010302 applied physicsCross-linked polyethylenebusiness.industryElectronic Optical and Magnetic Material010401 analytical chemistryElectrical engineeringfault diagnosiHigh voltagePolyethylene0104 chemical sciencesElectronic Optical and Magnetic Materialspartial dischargechemistryPartial dischargebusinesspower cableVoltageIEEE Electrical Insulation Magazine
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Space Charges and Partial Discharges Simultaneous Measurements under DC Stress

2016

In the field of HVDC, the main causes of insulation aging are due to the space charge and PD phenomena. In particular, the purpose of the present work is to verify a possibility to measure simultaneously the space charge and the PDs under DC stress in order to evaluate the correlation between both phenomena. The space charge was measured by using a modified PEA cell and PDs were measured by using a novel wireless sensor system. The space charge profile and the PD pulses carried out simultaneously have been reported and discussed.

010302 applied physicsMaterials sciencebusiness.industry020209 energyElectrical engineering02 engineering and technologyMechanicsSpace (mathematics)01 natural sciencesspace charge partial discharges DC stress HVDCStress (mechanics)Settore ING-IND/31 - Elettrotecnica0103 physical sciences0202 electrical engineering electronic engineering information engineeringbusiness
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Partial discharge behavior under single phase half and full-bridge rectifier

2017

The aim of the present work is to simulate partial discharges (PDs) phenomena under voltage stress close to the Direct Current (DC) waveform. The employed waveforms have been realized by using a full-wave and a half-wave rectifiers. After that, in order to generate a steadier voltage supply, a capacitive filter has been inserted in the output of the half-wave rectifier. Simulations have been carried out by modifying a previous software used in the case of Alternating Current (AC). Finally, experimental tests have been carried out in order to validate simulation results.

Materials sciencePD model020209 energyCapacitive sensing02 engineering and technology01 natural scienceslaw.inventionRectifierControl theorylaw0103 physical sciences0202 electrical engineering electronic engineering information engineeringWaveformElectrical and Electronic Engineering010302 applied physicsHVDCElectronic Optical and Magnetic MaterialDirect currentDC streRectified waveformSettore ING-IND/33 - Sistemi Elettrici Per L'EnergiaSettore ING-IND/31 - ElettrotecnicaFilter (video)Partial dischargePartial DischargeAlternating currentVoltage
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