标题：Model predictive direct current control strategy for three-level T-type rectifier under unbalanced grid voltage conditions
作者：Li, Xiaoyan ;Zhang, Chenghui ;Chen, Alian ;Xing, Xiangyang ;Zhang, Guangxian
作者机构：[Li, Xiaoyan ;Zhang, Chenghui ;Chen, Alian ;Xing, Xiangyang ;Zhang, Guangxian ] School of Control Science and Engineering, Shandong University, Jinan; 更多
会议名称：33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
会议日期：4 March 2018 through 8 March 2018
来源：Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
关键词：Model predictive direct current control; Neutral-point balance; Three-level T-type rectifier; Unbalanced grid voltages
摘要：In order to reduce the total harmonic distortion (THD) of grid current and output power fluctuations under unbalanced grid voltages, a model predictive direct current control (MPDCC) strategy is proposed for three-level T-type rectifier. The reference current is used as the control objective and calculated by grid voltages and its 1/4 delaying value. Compared with the conventional method, computation of instantaneous active power and reactive power, extraction of positive and negative sequence, phase-locked loop (PLL), PWM modulation and inner current loop are avoided. In addition, the redundant P-type and N-type small vectors are selected to control the neutral-point balance simultaneously. The experimental results are presented to verify the feasibility and effectiveness of proposed MPDCC strategy. © 2018 IEEE.