Assessment of the Influence of Losses on the Performance of the Electromagnetic Time Reversal Fault Location Method

作者：Razzaghi Reza^*; Lugrin Gaspard; Rachidi Farhad; Paolone Mario

来源：IEEE Transactions on Power Delivery, 2017, 32(5): 2303-2312.

DOI：10.1109/TPWRD.2016.2615887

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

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.

• 出版日期2017-10