Abstract：A neutral-point balancing method for Z source neutral point clamped (NPC) three-level inverter, based on simplified three-level space vector pulse width modulation (SVPWM), is proposed in this paper by analyzing the neutral-point balancing principle, which facilitates the injection of shoot through signals. The proposed method figures out the optimal solution of the balancing index, and realizes the constant voltage control of Z source output by deriving the relationship of the shoot-through ratio, modulation index and balancing index. It suppresses the fluctuation of neutral point efficiently, realizes the control of Boost voltage of Z source network conveniently, and simplifies the control algorithm. Simulation and experimental results verify the proposed neutral point control algorithm.
王伟胜, 陈阿莲, 柴锦, 邢相洋, 张承慧. 基于简化SVPWM的Z源三电平逆变器中点电位控制方法[J]. 电工技术学报, 2018, 33(8): 1835-1843.
Wang Weisheng, Chen Alian, Chai Jin, Xing Xiangyang, Zhang Chenghui. The Neutral-Point Balancing Method for Z Source Neutral Point Clamped Inverter Based on Simplified SVPWM. Transactions of China Electrotechnical Society, 2018, 33(8): 1835-1843.
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2018, Vol. 33 
