Method and system for communications channel delay asymmetry compensation using global positioning systems

A system for compensating for communications channel delay asymmetry in a current differential protection system, comprising:

• a first algorithm for determining an apparent sampling clock offset for a communications channel, said apparent sampling clock offset between a first sampling clock and a second sampling clock configured within the current differential protection system;
• a second algorithm for determining an apparent global positioning system (GPS) clock offset for said communications channel, said apparent GPS clock offset between a plurality of GPS time stamps corresponding to said first and said second sampling clocks;
• and
• a mechanism for computing a compensated clock offset by subtracting said apparent GPS clock offset from said apparent sampling clock offset so as to cancel out a channel asymmetry component of deviation in said apparent GPS and sampling clock offsets.