{'fraction_non_alphanumeric': 0.015256588072122053, 'fraction_numerical': 0.0, 'mean_word_length': 5.747663551401869, '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}}
Precision Measurement System for the Calibration of Phasor Measurement Units

Phasor measurement units (PMUs) are used for monitoring, protection, and control of smart grids. Characterization of PMUs to national standards of measurement is important to assure reliability and consistency of PMUs across the industry and is required by documentary standards. At the National Measurement Institute, Australia, we have developed a calibration system to provide some calibration points for the characterization of PMUs under steady-state conditions that can be compatible with standard tests. This paper describes the operation and calibration of the system with emphasis on traceability to national standards of measurement.