Modeling of high frequency current transformer based partial discharge detection in high voltage cables

Xiao Hu, W. H. Siew, Martin D. Judd, Alistair J. Reid, Bojie Sheng

Research output: Contribution to journalArticle

Abstract

Partial discharge (PD) testing of high voltage (HV) cables and cable accessories has been implemented predominantly using high frequency current transformers (HFCTs) as PD sensors. PD currents initiating at PD sources are coupled onto cable conductors and travel away from the PD sources and will be detected by HFCTs installed at cable terminations. In this paper, based on combining finite-difference time-domain (FDTD) modeling and transfer function theory, a hybrid modeling approach is proposed to investigate the processes of PD coupling and detection involved in HFCT-based PD testing of HV cables. This approach allows exciting a PD event anywhere in FDTD models of the cables and predicting output from HFCTs some distance away. Implementation of the method is illustrated using an 11 kV XLPE cable. Moreover, a “direct measurement” method to obtain original PD pulses as the excitation source waveform is presented. The modeling approach introduced here will facilitate studies on the relationship between measured PD signals and those excited at PD sources, which can potentially give useful insight into the basic mechanisms behind PD detection in cables.
LanguageEnglish
Number of pages8
JournalIEEE Transactions on Power Delivery
Publication statusAccepted/In press - 5 Apr 2019

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Electric instrument transformers
Partial discharges
Cables
Electric potential
Electric connectors
Accessories
Testing
Transfer functions

Keywords

  • finite-difference time-domain (FDTD)
  • transfer functions
  • high frequency current transformer (HFCT)
  • partial discharge (PD)
  • power cables

Cite this

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title = "Modeling of high frequency current transformer based partial discharge detection in high voltage cables",
abstract = "Partial discharge (PD) testing of high voltage (HV) cables and cable accessories has been implemented predominantly using high frequency current transformers (HFCTs) as PD sensors. PD currents initiating at PD sources are coupled onto cable conductors and travel away from the PD sources and will be detected by HFCTs installed at cable terminations. In this paper, based on combining finite-difference time-domain (FDTD) modeling and transfer function theory, a hybrid modeling approach is proposed to investigate the processes of PD coupling and detection involved in HFCT-based PD testing of HV cables. This approach allows exciting a PD event anywhere in FDTD models of the cables and predicting output from HFCTs some distance away. Implementation of the method is illustrated using an 11 kV XLPE cable. Moreover, a “direct measurement” method to obtain original PD pulses as the excitation source waveform is presented. The modeling approach introduced here will facilitate studies on the relationship between measured PD signals and those excited at PD sources, which can potentially give useful insight into the basic mechanisms behind PD detection in cables.",
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Modeling of high frequency current transformer based partial discharge detection in high voltage cables. / Hu, Xiao; Siew, W. H.; Judd, Martin D.; Reid, Alistair J.; Sheng, Bojie.

In: IEEE Transactions on Power Delivery, 05.04.2019.

Research output: Contribution to journalArticle

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N1 - © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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