{'fraction_non_alphanumeric': 0.014124293785310734, 'fraction_numerical': 0.0, 'mean_word_length': 5.274336283185841, '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}}
Design of Parameters for Cascaded H-bridge Converter Withstanding Asymmetric Voltage Sags

to improve the voltage sag tolerance of cascaded H-bridge converter (CHB), the operation characteristics of rectifier bridge in CHB are analyzed and the DC voltage model of CHB sub-module is established When the grid voltage appears asymmetric voltage sag. A method for optimizing the cascade number and DC capacitor of CHB withstanding asymmetric voltage sags is proposed, which makes CHB operate normally even when the asymmetric sag of input voltage is the most serious and improve the tolerance of CHB to asymmetric voltage sags. The simulation results show the effectiveness of the parameter optimization method.