| 基于模糊控制的 VSVPWM 中点电位平衡策略 |
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| 引用本文： | 戴铭言,许留伟,吴亚楠,沈显顺,杨慎飞,田贇祥.基于模糊控制的 VSVPWM 中点电位平衡策略[J].核聚变与等离子体物理,2022,42(4):418-425. |
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| 作者姓名： | 戴铭言 许留伟 吴亚楠 沈显顺 杨慎飞 田贇祥 |
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| 作者单位： | (1. 中国科学院等离子体物理研究所，合肥 230031；
2. 中国科学技术大学，合肥 230026；
3. 国网江西省电力公司检修分公司，南昌 330006) |
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| 基金项目： | 国家自然科学基金(51707190)；安徽省重点研究和开发计划项目(201904a05020090) |
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| 摘 要： | 针对中点钳位型(NPC)三电平逆变器存在的直流侧中点电位不平衡问题，提出了一种基于模糊控制
的中点电位平衡策略。该策略重新定义了虚拟空间矢量，使虚拟小矢量不引起中点电位波动，并在虚拟中矢量中
引入了对中点电位不平衡有抑制作用的控制因子 Q。同时，设计了由模糊控制器 A 和 B 构成的组合模糊控制器，
该控制器能够依据中点电位偏移情况调整控制因子 Q，实现对中点电位的闭环控制。仿真和实验结果表明，采用
该策略的 NPC 型三电平逆变器中点电位不平衡问题能得到有效改善。
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| 关 键 词： | 三电平逆变器 中点电位平衡 模糊控制 虚拟空间矢量 |
| 收稿时间： | 2020-09-03 |
VSVPWM neutral-point potential balancing strategy based
on fuzzy control |
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| DAI Ming-yan,XU Liu-wei,WU Ya-nan,SHEN Xian-shun,YANG Shen-fei,TIAN Yun-xiang.VSVPWM neutral-point potential balancing strategy based
on fuzzy control[J].Nuclear Fusion and Plasma Physics,2022,42(4):418-425. |
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| Authors: | DAI Ming-yan XU Liu-wei WU Ya-nan SHEN Xian-shun YANG Shen-fei TIAN Yun-xiang |
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| Institution: | (1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031;
2. University of Science and Technology of China, Hefei 230026;
3. State Grid JiangXi Maintenance Company, Nanchang 330006) |
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| Abstract: | A neutral-point potential balancing strategy based on fuzzy control is proposed to solve the
problem of DC neutral-point potential imbalance in NPC three-level inverter. The strategy redefines the virtual
space vector so that the virtual small vector does not cause the neutral point potential fluctuation, and introduces
the control factor Q into the virtual medium vector, which can inhibit the neutral point potential imbalance. At the
same time, a combined fuzzy controller composed of fuzzy controller A and B is designed. The controller can
adjust the control factor Q according to the neutral point potential deviation to realize the closed-loop control of
neutral-point potential. Simulation and experimental results show that the neutral-point potential imbalance
problem of NPC three-level inverter using this strategy can be effectively improved. |
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| Keywords: | Three-level inverter Neutral-point potential balance Fuzzy control Virtual space vector |
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