Time signal manipulation and spoofing detection based on a latency of a communication system

A method, comprising:

• receiving a time signal at each of a first location and a second location;
• generating, via a first intelligent electronic device (IED) at the first location, a first measurement of electrical conditions at the first location at a first time based on the time signal;
• generating, via a second IED at the second location, a second measurement of electrical conditions at the second location at the first time based on the time signal;
• transmitting the second measurement from the second IED through a communication system to the first IED;
• determining a latency based on a comparison between a second time in which the second measurement is received by the first IED and the first time;
• generating an indication of whether the latency exceeds a first threshold;
• identifying an anomalous condition based on the indication;
• and
• excluding the second measurement from a control action of an electric power system when the latency exceeds the first threshold.

A system, comprising:

• a time input configured to receive a time signal;
• a monitored equipment interface configured to receive, via measuring conditions of a power delivery system, a first representation of a first condition at a first location at a first time based on the time signal;
• a communications interface configured to receive, via a communication system, a second representation of a second condition at a second location and at the first time based on the time signal;
• a latency determination subsystem in communication with the time input, monitored equipment interface, and the communications interface and configured to determine a latency based on a comparison between a second time in which the second measurement is received by the second interface through the communication system and the first time;
• a threshold subsystem configured to generate an indication of whether the latency exceeds a threshold;
• an anomalous condition subsystem configured to identify an anomalous condition based on the indication;
• and
• a remedial action subsystem configured to exclude the second measurement from a control action of an electric power system when the latency exceeds the first threshold.