Data alignment in large scale electrical system applications

A power monitoring system for aligning data, comprising:

• a system controller coupled to a memory;
• a reference monitoring device having a communication interface, a controller, and a sensing circuit, the communication interface being coupled to the system controller;
• and
• a second monitoring device having a communication interface coupled to the system controller, a controller, and a sensing circuit, the communication interface coupled to the system controller, and wherein the system controller is remote from the reference monitoring device and the second monitoring device;
• wherein the system controller is configured to:
• receive from the reference monitoring device a voltage and a current measured by the reference monitoring device;
• retrieve from the memory model parameters of a transmission line model that characterizes a circuit including a conductor connected between the reference monitoring device and the second monitoring device;
• calculate a phase shift offset according to a function that includes the measured voltage, the measured current, and the model parameters, the phase shift offset indicating a phase difference of the current or voltage between the reference monitoring device and the second monitoring device;
• store the phase shift offset associated with the reference monitoring device and the second monitoring device;
• add the phase shift offset to a determined cycle count offset associated with the reference monitoring device and the second monitoring device to produce an aggregate offset, the cycle count offset representing an integer number of cycles that a measured characteristic by the reference monitoring device is to be added to or subtracted from a cycle count of the measured characteristic by the second monitoring device at a measured time, the cycle count representing a number of consecutive cycles of the measured voltage or current counted by the reference monitoring device or the second monitoring device;
• align the first voltage or current measured by the reference device temporally with the voltage or current measured by the second monitoring device using the phase shift aggregate offset;
• and
• adjust at least one parameter of the second monitoring device based at least in part on the phase shift.