Intelligent electronic device and method thereof

An intelligent electronic device (IED) comprising:

• at least one sensor configured for sensing at least one electrical parameter of electrical power distributed from an electrical distribution system to a load;
• at least one analog-to-digital converter coupled to the at least one sensor and configured for converting an analog signal output from the at least one sensor to digital data;
• at least one processing module coupled to the at least one analog-to-digital converter and to non-transitory memory storing instructions that when executed cause the at least one processing module to:
• receive the digital data;
• obtain a plurality of instantaneous flicker sensation level values based on the digital data;
• summarize and characterize a plurality of instantaneous flicker sensation level values as histogram formatted data;
• select a specific percentile of the instantaneous flicker sensation level values from the histogram formatted data;
• and
• calculate a short-term flicker severity level value according to the specific percentile.