Wenxin Zhao Xinbo Ruan Dongsheng Yang 0003 Xinran Chen Lei Jia Neutral Point Voltage Ripple Suppression for a Three-Phase Four-Wire Inverter With an Independently Controlled Neutral Module. 2608-2619 2017 64 IEEE Trans. Ind. Electron. 4 https://doi.org/10.1109/TIE.2016.2632678 db/journals/tie/tie64.html#ZhaoRYCJ17