Combined wavelet transform and regression technique for secondary current compensation of current transformers

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61 Citations (Scopus)

Abstract

A technique is proposed to effectively and efficiently compensate for secondary current of current transformers, particularly in the presence of remanent flux. The technique first utilises the wavelet transform to accurately distinguish the distorted section from the healthy section of a secondary current waveform. Secondly the technique uses the regression method to recover the distorted section making use of features extracted from the healthy section, essentially to restore the secondary current to a scaled down replica of the primary system current. The proposed technique is demonstrated on a sample power system, achieving an average compensation error of 1.5% under varying degrees of saturation caused by different levels of remanent flux
LanguageEnglish
Pages497-503
Number of pages7
JournalGeneration, Transmission and Distribution, IEE Proceedings-
Volume149
Issue number4
StatusPublished - 2002

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Electric instrument transformers
Wavelet transforms
Fluxes
Error compensation
Compensation and Redress

Keywords

  • wavelet transforms
  • magnetic flux
  • primary system current
  • statistical analysis
  • regression method
  • combined wavelet transform
  • regression technique
  • compensation error
  • compensation
  • current transformers
  • secondary current compensation
  • secondary current waveform
  • remanent flux

Cite this

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title = "Combined wavelet transform and regression technique for secondary current compensation of current transformers",
abstract = "A technique is proposed to effectively and efficiently compensate for secondary current of current transformers, particularly in the presence of remanent flux. The technique first utilises the wavelet transform to accurately distinguish the distorted section from the healthy section of a secondary current waveform. Secondly the technique uses the regression method to recover the distorted section making use of features extracted from the healthy section, essentially to restore the secondary current to a scaled down replica of the primary system current. The proposed technique is demonstrated on a sample power system, achieving an average compensation error of 1.5{\%} under varying degrees of saturation caused by different levels of remanent flux",
keywords = "wavelet transforms, magnetic flux, primary system current, statistical analysis, regression method, combined wavelet transform, regression technique, compensation error, compensation, current transformers, secondary current compensation, secondary current waveform, remanent flux",
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T1 - Combined wavelet transform and regression technique for secondary current compensation of current transformers

AU - Li, F

AU - Li, Y

AU - Aggarwal, R K

PY - 2002

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N2 - A technique is proposed to effectively and efficiently compensate for secondary current of current transformers, particularly in the presence of remanent flux. The technique first utilises the wavelet transform to accurately distinguish the distorted section from the healthy section of a secondary current waveform. Secondly the technique uses the regression method to recover the distorted section making use of features extracted from the healthy section, essentially to restore the secondary current to a scaled down replica of the primary system current. The proposed technique is demonstrated on a sample power system, achieving an average compensation error of 1.5% under varying degrees of saturation caused by different levels of remanent flux

AB - A technique is proposed to effectively and efficiently compensate for secondary current of current transformers, particularly in the presence of remanent flux. The technique first utilises the wavelet transform to accurately distinguish the distorted section from the healthy section of a secondary current waveform. Secondly the technique uses the regression method to recover the distorted section making use of features extracted from the healthy section, essentially to restore the secondary current to a scaled down replica of the primary system current. The proposed technique is demonstrated on a sample power system, achieving an average compensation error of 1.5% under varying degrees of saturation caused by different levels of remanent flux

KW - wavelet transforms

KW - magnetic flux

KW - primary system current

KW - statistical analysis

KW - regression method

KW - combined wavelet transform

KW - regression technique

KW - compensation error

KW - compensation

KW - current transformers

KW - secondary current compensation

KW - secondary current waveform

KW - remanent flux

M3 - Article

VL - 149

SP - 497

EP - 503

JO - Generation, Transmission and Distribution, IEE Proceedings-

T2 - Generation, Transmission and Distribution, IEE Proceedings-

JF - Generation, Transmission and Distribution, IEE Proceedings-

SN - 1350-2360

IS - 4

ER -