直流侧电压平衡是级联型动态电压恢复器的关键问题。
DC voltage balance is the key issues of cascaded dynamic voltage restorer.
直流侧电容电压平衡问题是三电平逆变器的研究重点之一，本文对其提出了一种改进的控制方法。
One of the research emphases of three-level inverter is the DC capacitor voltage balancing problem. In this paper this problem is studied thoroughly and a new method to solve it is proposed.
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