{'fraction_non_alphanumeric': 0.02446183953033268, 'fraction_numerical': 0.0, 'mean_word_length': 5.730263157894737, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Identification of Lightning Disturbance in Ultra-High-Speed Transmission Line Protection

The application of ultra-high-speed protection based on traveling-waves or transient components suffers mal-operation in case of lightning strokes on transmission lines. This paper analyzes the spectra and traveling-wave waveforms of current transient components to find the differences in energy distribution and waveform. The characteristics are as follows: the signal energy of short-circuit faults and lightning-induced severe faults mainly focuses at low-frequency band; the signal generated by non-faulty lightning (lightning disturbance) and lightning-induced weak faults contains lots of high-frequency components; relative to lightning disturbance, the chopped wave caused by lightning-induced weak faults is obvious. According to the differences, the paper proposes a method to identify lightning disturbance based on the features of energy distribution and chopped wave. EMTP simulation tests prove the method is feasible