{'fraction_non_alphanumeric': 0.013918629550321198, 'fraction_numerical': 0.0, 'mean_word_length': 5.404109589041096, '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}}
A hybrid method for current transformer saturation detection and compensation in smart grid

A new hybrid method for current transformer (CT) saturation detection and compensation is proposed to solve the problem that the large fault current can saturate the CT in smart grid. The proposed method uses the differential equation after digital filtering to detect the saturation start time and has a strong anti-noise capability. After the saturation start time is detected, the current integral is used to detect the saturation end time, so that the saturation interval is fully determined. Finally, the improved least square method is used to compensate for the distorted saturation current. It calculates the sine component and the DC attenuation component separately. Simulation studies under different saturation conditions are performed using PSCAD, and the simulation results demonstrate the effectiveness of the proposed method.