0000000000013973

AUTHOR

Stanislaw Gubanski

showing 3 related works from this author

Partial discharge of gel insulated high voltage power modules subjected to unconventional voltage waveforms

2016

Performances and duration of the new generation of high voltage power electronic components are dependent on dielectric materials aim to insulating their internal terminals. The presence of defects, some due to faults generated during the manufacturing process, but also due to the internal design of layers and connections, can cause local enhancements of electric field and consequently possible activity of partial discharges phenomena or other effects (aging, tracking) that may result in reduction of device reliability. Furthermore, the usage of unconventional voltage waveforms, like square waves or pulse width modulated waves, additionally increases the electrical aging of the insulation s…

010302 applied physicsMaterials sciencebusiness.industryAcoustics020208 electrical & electronic engineeringElectrical engineeringHigh voltage02 engineering and technologyInsulated-gate bipolar transistor01 natural sciencesSettore ING-IND/31 - ElettrotecnicaReliability (semiconductor)Partial Discharge Gel insulation IGBTvisual_artInsulation systemPower module0103 physical sciencesElectronic componentPartial discharge0202 electrical engineering electronic engineering information engineeringvisual_art.visual_art_mediumbusinessVoltage2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
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PD characteristics at Square Shaped Voltages Applying Two Different Detecting Techniques

2016

Nowadays power electronic converters are widely used and the fast switching voltage fronts results in an increased stress on the insulation material and may cause a reduction of the HV systems reliability. Nonsinusoidal voltage waveform have influence on the partial discharges (PD) characteristics in insulating systems due to the increased harmonic content which causes problems mainly in electrical PD measurement setups. In fact, impulse voltages cause strong switching disturbances, which make it much more difficult to distinguish PD signals from noise. This work investigates the influence of repetitive steep pulses on different types of test objects exposed to square wave voltages applying…

010302 applied physicsFrequency responseEngineeringbusiness.industrySystem of measurementPartial Discharge measurements square waveformSquare waveImpulse (physics)01 natural sciencesSettore ING-IND/31 - ElettrotecnicaRise time0103 physical sciencesPartial dischargeElectronic engineeringWaveformbusinessVoltage
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Partial discharges at different voltage waveshapes: Comparison between two different acquisition systems

2018

In modern HV apparatuses the wide use of electronic converters, increase the stress on the involved insulation systems and thus affect the reliability of the whole power grid. Additionally, such non-sinusoidal voltage shapes contain high gradient flanks that create problems in the detection of partial discharge (PD) activity. The aim of this paper is to discuss the methodology on how to suitably approach PD detection in insulation systems exposed to various voltage waveshapes in general by comparing two different measuring systems. The first one, equipped with a resonant PD decoupler, designed specifically for detection at typical power electronic waveshapes and the other one, based on an a…

010302 applied physicsFrequency responseMaterials sciencebusiness.industrySystem of measurement020208 electrical & electronic engineeringElectrical engineering02 engineering and technologyConverters01 natural sciencesPower (physics)Settore ING-IND/31 - ElettrotecnicaReliability (semiconductor)Partial discharge0103 physical sciencesPartial discharge0202 electrical engineering electronic engineering information engineeringmeasurementElectronicsElectrical and Electronic Engineeringbusinesssquare voltage waveformsVoltageIEEE Transactions on Dielectrics and Electrical Insulation
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