High Quality NLM Method for Medium Voltage Hybrid Bridge MMC YE Jiaxiong, WANG Jikang, PENG Yuanquan, FAN Xinming and LIU Yijun E3S Web Conf., 236 (2021) 01030 Published online: 09 February 2021 DOI: 10.1051/e3sconf/202123601030