Estimation Accuracy of the Electric Field in Cable Insulation Based on Space Charge Measurement

Space charge measurement accuracy is crucial when assessing the suitability of cables for high-voltage direct current (DC) systems. This study assembled state-of-the-art analysis technologies, including time-domain deconvolution, to mark electric field estimation accuracy, which the present techniqu...

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Published inEnergies Vol. 15; no. 13; p. 4920
Main Authors Fuse, Norikazu, Morita, Shosuke, Miyazaki, Satoru, Takahashi, Toshihiro, Hozumi, Naohiro
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 05.07.2022
Subjects
Accuracy
Cables
Data analysis
Data processing
deconvolution
Electric fields
estimation accuracy
field distribution
Polyethylene
power cables
pulsed electroacoustic method
space charge measurement
Statistical analysis
T
Technology
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Abstract Space charge measurement accuracy is crucial when assessing the suitability of cables for high-voltage direct current (DC) systems. This study assembled state-of-the-art analysis technologies, including time-domain deconvolution, to mark electric field estimation accuracy, which the present techniques achieve. The pulse electroacoustic method was applied to a 66 kV-class extruded cable, and waveforms were obtained and analyzed to reproduce the electric field distribution. The DC voltage was set to be sufficiently low so that the analysis results can be compared with Laplace’s equation. The statistical analysis of 81 waveforms under a DC voltage of 30 kV showed that the estimation accuracy was −0.3% ± 19.9% with a 95.4% confidence interval, even with the deconvolution parameter optimized. The estimated accuracy using the “reference” waveform is applied to waveforms at higher voltages since similar estimation accuracies were confirmed for waveforms obtained under a DC voltage of 45 kV.
AbstractList Space charge measurement accuracy is crucial when assessing the suitability of cables for high-voltage direct current (DC) systems. This study assembled state-of-the-art analysis technologies, including time-domain deconvolution, to mark electric field estimation accuracy, which the present techniques achieve. The pulse electroacoustic method was applied to a 66 kV-class extruded cable, and waveforms were obtained and analyzed to reproduce the electric field distribution. The DC voltage was set to be sufficiently low so that the analysis results can be compared with Laplace’s equation. The statistical analysis of 81 waveforms under a DC voltage of 30 kV showed that the estimation accuracy was −0.3% ± 19.9% with a 95.4% confidence interval, even with the deconvolution parameter optimized. The estimated accuracy using the “reference” waveform is applied to waveforms at higher voltages since similar estimation accuracies were confirmed for waveforms obtained under a DC voltage of 45 kV.
Author Norikazu Fuse
Naohiro Hozumi
Shosuke Morita
Toshihiro Takahashi
Satoru Miyazaki
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  givenname: Naohiro
  surname: Hozumi
  fullname: Hozumi, Naohiro
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Snippet Space charge measurement accuracy is crucial when assessing the suitability of cables for high-voltage direct current (DC) systems. This study assembled...
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StartPage 4920
SubjectTerms Accuracy
Cables
Data analysis
Data processing
deconvolution
Electric fields
estimation accuracy
field distribution
Polyethylene
power cables
pulsed electroacoustic method
space charge measurement
Statistical analysis
T
Technology
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Title Estimation Accuracy of the Electric Field in Cable Insulation Based on Space Charge Measurement
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