Space Charge Measurement under DC and DC Periodic Waveform

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Abstract

In High Voltage systems, Partial Discharges (PDs) monitoring are one of the main diagnostic instrument to evaluate the reliability of the apparatus. Under Alternating Current (AC) stress, PDs detection and recognition techniques are well consolidated. On the contrary, the monitoring of PDs under Direct Current (DC) stress is difficult due to complexities related to the nature of the phenomenon, which cause the beginning of PDs events in proximity of the dielectric breakdown. This problem has been partially overcome by using a continuous Periodic waveform (DCP) with positive average value, as described in a recent published work. Under DC stress, another degradation factor is the Space Charge accumulation phenomenon. Considering that the latter phenomenon is widely influenced on the applied voltage, the aim of the proposed work was to confirm that the effect of this new DCP waveform is the same of that generated by a constant DC stress, from the space charge accumulation phenomenon point of view. The experimental tests have been performed by using the Pulsed Electro-Acoustic (PEA) method and the comparison between the charge profiles obtained by stressing the specimen with both the DC and DCP waveforms has been carried out.
Lingua originaleEnglish
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cita questo

@conference{5f98251d058b4c769ec972dfe6cea699,
title = "Space Charge Measurement under DC and DC Periodic Waveform",
abstract = "In High Voltage systems, Partial Discharges (PDs) monitoring are one of the main diagnostic instrument to evaluate the reliability of the apparatus. Under Alternating Current (AC) stress, PDs detection and recognition techniques are well consolidated. On the contrary, the monitoring of PDs under Direct Current (DC) stress is difficult due to complexities related to the nature of the phenomenon, which cause the beginning of PDs events in proximity of the dielectric breakdown. This problem has been partially overcome by using a continuous Periodic waveform (DCP) with positive average value, as described in a recent published work. Under DC stress, another degradation factor is the Space Charge accumulation phenomenon. Considering that the latter phenomenon is widely influenced on the applied voltage, the aim of the proposed work was to confirm that the effect of this new DCP waveform is the same of that generated by a constant DC stress, from the space charge accumulation phenomenon point of view. The experimental tests have been performed by using the Pulsed Electro-Acoustic (PEA) method and the comparison between the charge profiles obtained by stressing the specimen with both the DC and DCP waveforms has been carried out.",
keywords = "DC stress; DCP stress; DCP waveform; PEA method; Space charge; Electronic, Optical and Magnetic Materials; Electrical and Electronic Engineering",
author = "Roberto Candela and Pietro Romano and Antonino Imburgia",
year = "2018",
language = "English",

}

TY - CONF

T1 - Space Charge Measurement under DC and DC Periodic Waveform

AU - Candela, Roberto

AU - Romano, Pietro

AU - Imburgia, Antonino

PY - 2018

Y1 - 2018

N2 - In High Voltage systems, Partial Discharges (PDs) monitoring are one of the main diagnostic instrument to evaluate the reliability of the apparatus. Under Alternating Current (AC) stress, PDs detection and recognition techniques are well consolidated. On the contrary, the monitoring of PDs under Direct Current (DC) stress is difficult due to complexities related to the nature of the phenomenon, which cause the beginning of PDs events in proximity of the dielectric breakdown. This problem has been partially overcome by using a continuous Periodic waveform (DCP) with positive average value, as described in a recent published work. Under DC stress, another degradation factor is the Space Charge accumulation phenomenon. Considering that the latter phenomenon is widely influenced on the applied voltage, the aim of the proposed work was to confirm that the effect of this new DCP waveform is the same of that generated by a constant DC stress, from the space charge accumulation phenomenon point of view. The experimental tests have been performed by using the Pulsed Electro-Acoustic (PEA) method and the comparison between the charge profiles obtained by stressing the specimen with both the DC and DCP waveforms has been carried out.

AB - In High Voltage systems, Partial Discharges (PDs) monitoring are one of the main diagnostic instrument to evaluate the reliability of the apparatus. Under Alternating Current (AC) stress, PDs detection and recognition techniques are well consolidated. On the contrary, the monitoring of PDs under Direct Current (DC) stress is difficult due to complexities related to the nature of the phenomenon, which cause the beginning of PDs events in proximity of the dielectric breakdown. This problem has been partially overcome by using a continuous Periodic waveform (DCP) with positive average value, as described in a recent published work. Under DC stress, another degradation factor is the Space Charge accumulation phenomenon. Considering that the latter phenomenon is widely influenced on the applied voltage, the aim of the proposed work was to confirm that the effect of this new DCP waveform is the same of that generated by a constant DC stress, from the space charge accumulation phenomenon point of view. The experimental tests have been performed by using the Pulsed Electro-Acoustic (PEA) method and the comparison between the charge profiles obtained by stressing the specimen with both the DC and DCP waveforms has been carried out.

KW - DC stress; DCP stress; DCP waveform; PEA method; Space charge; Electronic, Optical and Magnetic Materials; Electrical and Electronic Engineering

UR - http://hdl.handle.net/10447/347839

M3 - Paper

ER -