US 11,907,010 B2
Multi-clock synchronization in power grids
Steve Chan, Orlando, FL (US)
Assigned to Vit Tall LLC, Orlando, FL (US)
Filed by Vit Tall LLC, Orlando, FL (US)
Filed on Apr. 21, 2023, as Appl. No. 18/304,404.
Application 18/304,404 is a division of application No. 17/189,826, filed on Mar. 2, 2021, granted, now 11,650,620.
Application 17/189,826 is a continuation of application No. PCT/US2019/033455, filed on May 22, 2019.
Prior Publication US 2023/0251685 A1, Aug. 10, 2023
Int. Cl. G06F 1/12 (2006.01); G06F 1/10 (2006.01); G06F 21/44 (2013.01); H04L 9/40 (2022.01)
CPC G06F 1/12 (2013.01) [G06F 1/10 (2013.01); G06F 21/445 (2013.01); H04L 63/123 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A time-synchronizing power grid system, comprising:
a plurality of timekeeping substations, wherein each substation comprises one or more clock devices; and
a system time controller device in communication with the plurality of timekeeping substations; wherein:
the clock devices report clock data to a group time controller device;
the group time controller device is configured to select a group best clock by applying the Best Master Clock Algorithm to the reported clock data to select a candidate group best clock, elect a reference value using an N-input voting algorithm, compare the candidate group best clock to the reference value using an accuracy threshold, and report the group best clock to the system time controller device;
the system time controller device is configured to select a grand master clock from the reported group best clocks using a fault-tolerant average algorithm; and
the clock devices are configured to synchronize to the grand master clock.