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首页> 外文会议>IEEE International Power Electronics and Application Conference and Exposition >Study On Neutral-point Potential Control for the APF Based on NPC Three-level Inverter
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Study On Neutral-point Potential Control for the APF Based on NPC Three-level Inverter

机译：基于NPC三电平逆变器的APF中点电位控制研究。

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Because of the neutral current, the dc voltage balancing control is important but very difficult for the three-phase four-wire APF based on the three-level neutral-point-clamped topology. And existing literatures can't accurately analyze the potential drift in the three-phase four-wire system. This paper proposes an accurate mathematical model of the dc-side voltages in this APF with parametric perturbation when working under the unbalanced condition. From this model, it can be get that the basic reason of neutral-point potential drift is the unbalanced distribution of active power caused by parametric perturbation. By injecting zero-sequence dc component, the neutral-point potential balancing control can be realized based on the exchange of active power between dc-side capacitors. Simulation and experiments show the effectiveness and performance of this proposed model.
机译：由于存在中性电流，直流电压平衡控制很重要，但对于基于三级中性点钳位拓扑的三相四线APF来说却非常困难。并且现有文献无法准确地分析三相四线系统中的电位漂移。本文提出了一种在不平衡条件下工作时具有参数扰动的APF中直流侧电压的精确数学模型。从该模型可以得出，中性点电位漂移的根本原因是由参数扰动引起的有功功率的不平衡分布。通过注入零序直流分量，可以基于直流侧电容器之间的有功功率交换来实现中性点电位平衡控制。仿真和实验表明该模型的有效性和性能。

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