Precise time available across the entire grid enables utilities to better monitor and control power systems with faster response times to effectively manage disturbances and ultimately prevent system-wide blackouts.
Synchrophasors PMU (Phasor Measurement Unit) requires better than a 1µs accuracy of synchronization to manage phase angle measurement in standards IEEE C37.118/IEEEC37.238. This enforce from PTP/IEEE1588 Grand Masters Clock to ensure synchronization accuracy to be much better than 200 ns on each timeserver LAN output.
The IEC 61850 (Bus & System) standard specifies the need for only one time base in substation, and a unified time tagging format for all devices in the power system. It specifies the use of absolute time synchronization for synchrophasors (PMU) while relative time synchronization is used for protection functions.
Read more in Faults of synchronisation based on GNSS NTP, PTP/IEEE1588
maintains electric power
IEEE C37.128.1a compliant