Fault detection and location in power distribution systems: The usefulness of the HS-OFDM scheme for time-domain reflectometry

Lucas Giroto de Oliveira, Mateus de L. Filomeno, H. Vincent Poor, Moisés V. Ribeiro

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


This study discusses key characteristics and benefits of using time-domain reflectometry (TDR) systems based on the Hermitian symmetric orthogonal frequency-division multiplexing (HS-OFDM) scheme for fault detection and location in power distribution networks. In this context, a system model with power line modems injecting signals and capturing reflections in a power distribution network is outlined. Next, two reflectogram processing approaches, namely digital pulse compression and channel estimation, are examined. Also, the effects of different parametrizations and multiple access schemes on the performance of the HS-OFDM-based TDR system are addressed. Numerical results confirm that HS-OFDM-based TDR systems making using of channel estimation outperforms their counterparts based on pulse compression. The frequency range for narrowband power line communication provides fair range resolution and maximum unambiguous range values. Also, it is seen that the use of frequency-division multiple access schemes implies different signal-to-interference-plus-noise ratio (SINR) performance among different power line modems (PLMs) connected to a power distribution network. Time-division and code-division multiple access schemes, on the other hand, provide fair SINR performance among the PLMs at the cost of obtaining a small number of reflectograms during a time interval.

Original languageEnglish (US)
Article number107600
JournalElectric Power Systems Research
StatePublished - Feb 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


  • Fault detection
  • Fault location
  • Multiple access schemes
  • Orthogonal frequency-division multiplexing
  • Power distribution networks
  • Time-domain reflectometry


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