UNDERSTANDING THE IMPACT OF TIME INACCURACY ON SYNCHROPHASORS, TRAVELING-WAVE FAULT LOCATING, AND LINE CURRENT DIFFERENTIAL PROTECTION
This month’s Featured Technical Paper is from the Proceedings of the 2025 International Conference of Doble Clients. The paper is titled: Understanding The Impact of Time Inaccuracy on Synchrophasors, Traveling-Wave Fault Locating, And Line Current Differential Protection.
Abstract
The availability of economical, reliable, and accurate time sources has enabled protection, monitoring, control, and post-event analysis of wide-area power system events. Synchrophasors, traveling-wave fault location (TWFL), and line current differential protection (87L) are a few applications that rely on the availability of high-accuracy time. When a clock supplying time-synchronization signal to these functions loses the global time reference, it starts to drift, and the clock drift manifests as timing error, impacting the functionality. In this paper, test results are presented that demonstrate the impact of time inaccuracy on synchrophasors, TWFL and 87L functions during clock holdover state. The importance of installing an accurate clock with good holdover accuracy is demonstrated through the test results.
Doble Service Agreement Clients
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