Partial discharge testing of defects in dielectric insulation under DC and voltage ripple conditions

E. Corr, A. Reid, X. Hu, W.H. Siew, M. Zhu, M. Judd, M. Seltzer-Grant, R. Giussani

Research output: Contribution to journalBook/Film/Article review

Abstract

This paper details testing conducted on selected void defects in dielectric insulation samples under various HVDC voltage conditions. The aim of this work is to illustrate the type of PD activity that could be observed in HVDC insulation systems. Initially the samples were subject to HVAC excitation to confirm the defect type and establish the PD inception voltage. HVDC testing was then conducted using a ‘ramp and hold’ test technique with different hold voltages in the ramp determined from the measured HVAC inception voltage. The effect of harmonic ripple superimposed on the HVDC voltage waveform, which is typically a result of the converter switching operation, was also investigated. The findings from this study should provide network operators and insulation manufacturers a greater insight into the behavior of PD phenomena in solid insulation under HVDC conditions, enabling greater confidence in the diagnosis of defect type and severity in such systems.
LanguageEnglish
Pages117-125
Number of pages9
JournalCIGRE Science and Engineering
Volume11
Publication statusPublished - 28 Jun 2018

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Partial discharges
Insulation
Defects
Testing
Electric potential
HVAC

Keywords

  • HVDC insulation
  • partial discharges
  • power cables

Cite this

Corr, E. ; Reid, A. ; Hu, X. ; Siew, W.H. ; Zhu, M. ; Judd, M. ; Seltzer-Grant, M. ; Giussani, R. / Partial discharge testing of defects in dielectric insulation under DC and voltage ripple conditions. In: CIGRE Science and Engineering. 2018 ; Vol. 11. pp. 117-125.
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abstract = "This paper details testing conducted on selected void defects in dielectric insulation samples under various HVDC voltage conditions. The aim of this work is to illustrate the type of PD activity that could be observed in HVDC insulation systems. Initially the samples were subject to HVAC excitation to confirm the defect type and establish the PD inception voltage. HVDC testing was then conducted using a ‘ramp and hold’ test technique with different hold voltages in the ramp determined from the measured HVAC inception voltage. The effect of harmonic ripple superimposed on the HVDC voltage waveform, which is typically a result of the converter switching operation, was also investigated. The findings from this study should provide network operators and insulation manufacturers a greater insight into the behavior of PD phenomena in solid insulation under HVDC conditions, enabling greater confidence in the diagnosis of defect type and severity in such systems.",
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Corr, E, Reid, A, Hu, X, Siew, WH, Zhu, M, Judd, M, Seltzer-Grant, M & Giussani, R 2018, 'Partial discharge testing of defects in dielectric insulation under DC and voltage ripple conditions' CIGRE Science and Engineering, vol. 11, pp. 117-125.

Partial discharge testing of defects in dielectric insulation under DC and voltage ripple conditions. / Corr, E.; Reid, A.; Hu, X.; Siew, W.H.; Zhu, M.; Judd, M.; Seltzer-Grant, M.; Giussani, R.

In: CIGRE Science and Engineering, Vol. 11, 28.06.2018, p. 117-125.

Research output: Contribution to journalBook/Film/Article review

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AU - Seltzer-Grant, M.

AU - Giussani, R.

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N2 - This paper details testing conducted on selected void defects in dielectric insulation samples under various HVDC voltage conditions. The aim of this work is to illustrate the type of PD activity that could be observed in HVDC insulation systems. Initially the samples were subject to HVAC excitation to confirm the defect type and establish the PD inception voltage. HVDC testing was then conducted using a ‘ramp and hold’ test technique with different hold voltages in the ramp determined from the measured HVAC inception voltage. The effect of harmonic ripple superimposed on the HVDC voltage waveform, which is typically a result of the converter switching operation, was also investigated. The findings from this study should provide network operators and insulation manufacturers a greater insight into the behavior of PD phenomena in solid insulation under HVDC conditions, enabling greater confidence in the diagnosis of defect type and severity in such systems.

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