This paper proposes a new strategy for balancing the neutral point voltage in the process of the three-level inverter vector controlling.

本文主要研究三电平逆变器在电压空间矢量控制过程中中性点电压平衡的控制方法。

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Through deduction and analysis, the conclusion can be made: low reactance at the neutral point of transformer has little effect on the switching over-voltage in power systems.

通过计算和分析表明：变压器中性点接入小电抗对系统的操作过电压基本不会产生影响。

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A method of keeping neutral point potential balanced based on three-level SPWM had been brought forward, which can improve output waveform and decrease the possibility of IGCT's over-voltage.

提出了一种基于三电平spwm调制的中点电压抑制方法，在改善输出波形质量的同时，有效的降低了IGCT过电压的危险。

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