Traveling wave identification using distortions for electric power system protection

A method for analyzing traveling waves in an electric power delivery system, comprising:

• receiving a plurality of electric power system signals;
• identifying a plurality of incident, reflected, and transmitted traveling waves from the plurality of electric power system signals;
• selecting a first traveling wave from the identified plurality of incident and transmitted traveling waves propagating in a direction of a monitored line;
• determining a first distortion of the first traveling wave;
• selecting a second traveling wave subsequent to the first traveling wave, the second traveling wave selected from the identified plurality of incident traveling waves;
• determining a second distortion of the second traveling wave;
• comparing the first distortion and the second distortion;
• determining whether the first distortion is consistent with the second distortion;
• and
• implementing a protective action based on a first determination that the first distortion is consistent with the second distortion.

A system to analyze traveling waves in an electric power delivery system, comprising:

• a processor;
• a non-transitory computer-readable medium comprising instructions that when executed by the processor cause the processor to implement operations for:
• receiving a plurality of electric power system signals;
• identifying a plurality of incident, reflected, and transmitted traveling waves from the plurality of electric power system signals;
• selecting a first traveling wave from the identified plurality of incident and transmitted traveling waves propagating in a direction of a monitored line;
• determining a first distortion of the first traveling wave;
• selecting a second traveling wave subsequent to the first traveling wave, the second traveling wave selected from the identified plurality of incident traveling waves;
• determining a second distortion of the second traveling wave;
• comparing the first distortion and the second distortion;
• determining whether the first distortion is consistent with the second distortion;
• and
• implementing a protective action based on a first determination that the first distortion is consistent with the second distortion.