A novel pilot protection scheme for transmission lines based on current distribution histograms and their Bhattacharyya coefficient

Hanli Weng, Hao Chen, Lei Wu, Jingguang Huang, Zhenxing Li

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The current waveform characteristics at both ends of a transmission line under different disturbances are represented by means of probability distribution histograms. By adopting the Bhattacharyya distance (BD) algorithm to quantify the similarity of current distribution histograms, a novel scheme of pilot protection for transmission lines based on Bhattacharyya coefficient (BC) is put forward. The proposed scheme can correctly identify internal faults, external faults, and faults accompanied with current transformer (CT) saturation of transmission lines. It also shows good performance in the cases of abnormal samples. The validity of the proposed scheme is evaluated by various simulation and dynamic analog experiment tests.

Original languageEnglish
Article number107056
JournalElectric Power Systems Research
Volume194
DOIs
StatePublished - May 2021

Keywords

  • Anti-noise robustness
  • Bhattacharyya coefficient (BC)
  • CT saturation
  • Current distribution histograms
  • Pilot protection

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