ABSTRACT

This paper proposes a novel modulation algorithm based on vector decomposition and model predictive control for 5-level active neutral-point-clamped (5 L-ANPC) inverter. Firstly, the control of 5-level inverter is transformed into that of 3-level inverter by vector decomposition, which reduces the control complexity. Secondly, based on the framework of 3-level inverter, the optimal zero sequence voltage and switch state sequence are selected by multi-objective optimisation of model predictive control to balance the neutral point voltage and floating capacitors voltages simultaneously. Finally, according to the optimal choice, single-carrier comparison is used to generate the drive signal, which does not require traditional dual-carrier or vector synthesis, and is relatively easy to implement. Experimental results verify the validity of the method.

摘要

针对五电平有源中点钳位（5 L-ANPC）逆变器，提出了一种基于矢量分解和模型预测控制的新型调制算法。首先，通过矢量分解将5电平逆变器的控制转换为3电平逆变器的控制，降低了控制复杂度。其次，基于三电平逆变器的框架，通过模型预测控制的多目标优化选择最优的零序电压和开关状态序列，同时平衡中性点电压和浮地电容电压。最后，根据最优选择，采用单载波比较产生驱动信号，不需要传统的双载波或矢量合成，实现起来相对容易。实验结果验证了该方法的有效性。