Assessment of the influence of losses on the performance of the electromagnetic time reversal fault location method

Reza Razzaghi, Gaspard Lugrin, Farhad Rachidi, Mario Paolone

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)


Electromagnetic time reversal (EMTR) has been shown to be an efficient method for locating faults in ac and dc power grids. In the available literature, the back-propagation medium has been considered to have identical losses as the direct-time medium. However, the telegrapher's equations describing the traveling wave propagation are time-reversal invariant if and only if inverted losses are considered in the back-propagation phase. This paper presents an analysis of the impact of losses on the performance of the EMTR-based fault location method for power networks. In this respect, three back-propagation models are proposed, analyzed, and compared. It is shown that a lossy back-propagation model, for which the wave equations are not rigorously time-reversal invariant, results in accurate fault locations. Finally, an EMTR fault location system based on the lossy back-propagation model and a fast electromagnetic transient simulation platform is developed and its performances validated.

Original languageEnglish
Article number7586050
Pages (from-to)2303-2312
Number of pages10
JournalIEEE Transactions on Power Delivery
Issue number5
Publication statusPublished - 1 Oct 2017
Externally publishedYes


  • electromagnetic time reversal
  • electromagnetic transients
  • Fault location
  • telegrapher's equations
  • transmission lines

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