Two methods to control the neutral point potential are proposed in this thesis which can solve the neutral point potential problem owned by three-level inverter.
针对三电平逆变器固有的中点电位平衡问题，本文提出并分析了两种能控制中点电位平衡的控制策略。
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。
Meanwhile, a corresponding strategy is also introduced to solve the inherent neutral point potential fluctuations of diode-clamped circuit.
针对二极管篏位形式电路固有的中点电位偏移问题，本文也提出了相应的控制策略。
After experiments with a load, neutral point potential is always maintained within the allowable range, to achieve a dynamic balance.
经过带载实验运行，中点电位始终保持在允许范围内，实现了动态平衡。
Meanwhile, the topology has voltage-self-balance ability, and therefore, no additional neutral-point-potential balancing circuit is needed.
同时，该拓扑具有电压自平衡能力，无需额外的中点电位平衡电路。
Meanwhile, the topology has voltage-self-balance ability, and therefore, no additional neutral-point-potential balancing circuit is needed.
同时，该拓扑具有电压自平衡能力，无需额外的中点电位平衡电路。
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