{'fraction_non_alphanumeric': 0.014311270125223614, 'fraction_numerical': 0.0017889087656529517, 'mean_word_length': 5.286516853932584, '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}}
Power quality measurements of distribution systems with LRT ultra-fast charging infrastructures

The introduction of catenary-free light rail transits (LRTs) in currently urban transportation systems becomes tendency and attractive alternative to traditional fuel cars and LRTs with overhead contact systems. This type of LRT trains are powered through onboard energy storage systems which are elements in an infrastructure that supplies electric energy for recharging of the LRT trains, which requires a higher charger power and current due to the fixed at-station charge duration of tens of seconds. It has been much more concern over power quality issues caused by the LRT. It is necessary to understand the influence of LRT charging impact on distribution systems before they are operated in scale. In this paper, a field power quality measurement of a practical distribution system connected to a LRT system with 6 traction substation stations and 1 depot traction substation station is carried out. Some of measured results of voltage/current trend, harmonics, and voltage deviations are presented and discussed.