Improving RF-based partial discharge localization via machine learning ensemble method

Ephraim Tersoo Iorkyase, Christos Tachtatzis, Pavlos Lazaridis, David Upton, Bakhtiar Saeed, Ian Glover, Robert C. Atkinson

Research output: Contribution to journalArticle

3 Citations (Scopus)
31 Downloads (Pure)

Abstract

Partial discharge (PD) is regarded as a precursor to plant failure and therefore, an effective indication of plant condition. Locating the source of PD before failure is key to efficient maintenance and improving reliability of power systems. This paper presents a low cost, autonomous partial discharge radiolocation mechanism to improve PD localization precision. The proposed radio frequency-based technique uses the wavelet packet transform (WPT) and machine learning ensemble methods to locate PDs. More specifically, the received signals are decomposed by the WPT and analyzed in order to identify localized PD signal patterns in the presence of noise. The regression tree algorithm, bootstrap aggregating method, and regression random forest are used to develop PD localization models based on the WPT-based PD features. The proposed PD localization scheme has been found to successfully locate PD with negligible error. Additionally, the principle of the PD location scheme has been validated using a separate test dataset. Numerical results demonstrate that the WPT-random forest PD localization scheme produced superior performance as a result of its robustness against noise.

Original languageEnglish
Pages (from-to)1478-1489
Number of pages12
JournalIEEE Transactions on Power Delivery
Volume34
Issue number4
Early online date25 Mar 2019
DOIs
Publication statusPublished - 31 Aug 2019

Keywords

  • partial discharge
  • localization
  • wavelet packet transform
  • bootstrap aggregating
  • random forest
  • regression tree

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