Modeling of high-frequency current transformer based partial discharge detection in high-voltage cables
| Autor: | Xiao Hu, Alistair Reid, Martin D. Judd, Wah Hoon Siew, Bojie Sheng |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Coupling
power cables Materials science business.industry 020209 energy partial discharge (PD) Electrical engineering Finite-difference time-domain method Energy Engineering and Power Technology High voltage 02 engineering and technology Transfer function Current transformer Partial discharge 0202 electrical engineering electronic engineering information engineering transfer functions Waveform Electrical and Electronic Engineering business high frequency current transformer (HFCT) Electrical conductor Finite-difference time-domain (FDTD) |
| ISSN: | 0885-8977 |
| Popis: | © 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. © 1986-2012 IEEE. 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. They travel away from the PD sources and are 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 of obtaining 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. |
| Databáze: | OpenAIRE |
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