A Novel Z-Type Self-Balancing Modular Multilevel Converter for Flywheel Driving ApplicationsShuoqi Cheng, Tong Zheng, Congzhe Gao, Jingliang Lv and Xinjian JiangE3S Web Conf., 271 (2021) 01025DOI: https://doi.org/10.1051/e3sconf/202127101025