US 12,107,420 B2
Systems and methods for phase identification using relative phase angle measurements
Christopher Fleck, St. Louis, MO (US); Roger Smith, Gibsonia, PA (US); and Rebecca Ross, Apollo, PA (US)
Assigned to Aclara Technologies LLC, St. Louis, MO (US)
Filed by Aclara Technologies LLC, St. Louis, MO (US)
Filed on May 25, 2023, as Appl. No. 18/202,189.
Application 18/202,189 is a division of application No. 17/365,520, filed on Jul. 1, 2021, granted, now 11,699,904.
Claims priority of provisional application 63/047,442, filed on Jul. 2, 2020.
Prior Publication US 2023/0299581 A1, Sep. 21, 2023
Int. Cl. H04L 7/02 (2006.01); H02J 3/08 (2006.01)
CPC H02J 3/08 (2013.01) [H04L 7/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for determining an electrical phase for one or more devices within a power distribution network, the method comprising:
receiving, at the one or more devices, a first synchronization message;
determining, at the one or more devices, a zero crossing of an AC waveform of the power distribution system occurring subsequent to receiving the first synchronization message;
calculating, at the one or more devices, a duration value between the receipt of the first synchronization message and the determined zero crossing;
generating, at the one or more devices, a data message comprising the duration value, a device identification value, and a synchronization ID value;
transmitting, by the one or more devices, the data message to an external device using a wireless communication protocol;
receiving, at the external device, the data message from a first device of the one or more devices;
transmitting the received data message to a central computing device;
comparing, at the central computing device, the duration value received from the first device against time difference values received from devices with a known phase connection; and
determining, at the central computing device, a phase of a utility power coupled to the first device based on the comparison.