| 基于SPWM的Z源三电平逆变器升压与中点平衡控制 |
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| 引用本文： | 彭泓,田乐杰. 基于SPWM的Z源三电平逆变器升压与中点平衡控制[J]. 电源学报, 2019, 17(6): 63-69 |
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| 作者姓名： | 彭泓 田乐杰 |
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| 作者单位： | 辽宁工程技术大学电气与控制工程学院, 葫芦岛 125105,辽宁工程技术大学电气与控制工程学院, 葫芦岛 125105 |
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| 摘 要： | Z源三电平逆变器通过注入直通状态可实现Z源三电平逆变器升压功能,但现有文献并没有考虑中点电位不平衡问题。为此,提出一种基于SPWM的方法来实现Z源三电平升压和中点平衡控制。首先通过注入直通状态实现升压控制,然后在此基础上,通过增加前馈改变直通占空比的方法实现了中点平衡控制。该方法不会增加Z源T型三电平逆变器的开关损耗,仿真和实验验证了所提方法的正确性。
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| 关 键 词： | Z源 三电平逆变器 升压控制 中点电位平衡控制 |
| 收稿时间： | 2017-04-06 |
| 修稿时间： | 2018-09-24 |
Boost and Neutral-point Balance Control of Z-source Three-level Inverter Based on SPWM |
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| PENG Hong and TIAN Lejie. Boost and Neutral-point Balance Control of Z-source Three-level Inverter Based on SPWM[J]. Journal of Power Supply, 2019, 17(6): 63-69 |
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| Authors: | PENG Hong and TIAN Lejie |
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| Affiliation: | Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China and Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China |
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| Abstract: | Through inserting the shoot-through state, a Z-source three-level inverter can realize the function of boost control. However, the problem of unbalanced neutral-point voltage is not taken into account in the existing literature. To solve this problem, an SPWM method is proposed to realize the boost and neutral-point balance control of the Z-source three-level inverter. First, the DC-link voltage is boosted by inserting the shoot-through state. On this basis, feed-forward is added to adjust the shoot-through duty cycle to realize the neutral-point balance control. This strategy does not increase the switching loss of the Z-source T-type three-level inverter. The validity of the proposed method was proved by simulation and experimental results. |
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| Keywords: | Z-source three-level inverter boost control neutral-point balance control |
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