VSVPWM neutral-point potential balancing strategy based
on fuzzy control

doi:10.16568/j.0254-6086.202204010

Nuclear Fusion and Plasma Physics ›› 2022, Vol. 42 ›› Issue (4): 418-425.DOI: 10.16568/j.0254-6086.202204010

• Nuclear Fusion Engineering • Previous Articles Next Articles

VSVPWM neutral-point potential balancing strategy based on fuzzy control

DAI Ming-yan1, 2, XU Liu-wei1 , WU Ya-nan1 , SHEN Xian-shun1, 2, YANG Shen-fei3 ,TIAN Yun-xiang1

(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)

Received:2020-09-03 Revised:2021-12-06 Online:2022-12-15 Published:2022-12-13

基于模糊控制的 VSVPWM 中点电位平衡策略

戴铭言 1, 2，许留伟 1 ，吴亚楠*1，沈显顺 1, 2，杨慎飞 3 ，田贇祥 1

(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)

作者简介:戴铭言(1994-)，男，河南郑州人，硕士研究生，从事无功补偿与谐波抑制研究。
基金资助:
国家自然科学基金(51707190)；安徽省重点研究和开发计划项目(201904a05020090)

Abstract

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.

Key words: Three-level inverter, Neutral-point potential balance, Fuzzy control, Virtual space vector

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。

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

CLC Number:

TM46
TL62

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.

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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VSVPWM neutral-point potential balancing strategy based on fuzzy control

基于模糊控制的 VSVPWM 中点电位平衡策略

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