Search results for "acoustic method"

showing 3 items of 3 documents

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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Review of acoustic methods for space charge measurement

2015

In the last decade, due to the increased use of direct current, the space charge accumulation phenomenon has reached more interest. In this regard, several non-destructive measurement systems were used. In particular, for solid dielectrics, the acoustic methods have had greater success. This review presents a brief historical evolution of the Pulse Electro- Acoustic (PEA) method, describing the working operation, the thicknesses analyzed and the spatial resolution for the different configurations of the PEA cell. The Pressure Wave Propagation (PWP) method in both configurations Piezo-PWP and Laser Induced Pressure Pulse (LIPP) is also described.

Materials sciencePressure Wave Propagation methodSystem of measurementAcousticsDirect currentDielectricLaser Induced Pressure Pulse methodSettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciSpace chargeTemperature measurementSpace chargePulse Electro- AcousticPulse (physics)PIPWPSettore ING-IND/31 - ElettrotecnicaElectronic engineeringacoustic methodPressure wave propagationPiezo-PWPImage resolution
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Pulsed Electro-Acoustic space charge apparatus – qualifying, testing and monitoring of insulation for HVDC cables and accessories

2022

partial dischargeSettore ING-IND/31 - ElettrotecnicaPulsed Electro Acoustic methodHVDC jointspace chargeHVDC cable
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