电力工程技术2026，Vol.45Issue(8)：57-68,12.DOI:10.12158/j.2096-3203.2026.08.006
中点电位快速均衡的模糊自适应VSVPWM策略
A fuzzy adaptive VSVPWM strategy for fast neutral point potential balance
摘要
Abstract
To address the problems of DC-side neutral point potential imbalance of neutral point clamped(NPC)three-level grid-connected inverters and the poor neutral point potential regulation performance of conventional virtual space vector pulse width modulation(VSVPWM)under high modulation index,this paper proposes a novel VSVPWM strategy to realize fast neutral point potential balance under high modulation index.Based on the imbalance mechanism of neutral point potential in NPC inverters,neutral point current is verified to be effective in regulating the neutral point potential.To enable the neutral point current generated by the action of virtual medium vectors to adjust the neutral point potential timely,the virtual medium vector with adjustable control factors is reconstructed in a 60° coordinate system.Fuzzy adaptive rules are designed to dynamically regulate the control factors according to the deviation and change rate of neutral point potential,so as to realize the optimal reconstruction of virtual medium vectors and achieve fast neutral point potential balance under high modulation index.Meanwhile,when the control factor takes the boundary value,the number of sectors is reduced to further decrease the computational complexity.Simulation and experimental results show that the proposed modulation strategy effectively improves the neutral point potential control performance under high modulation index,possesses satisfactory dynamic performance,and significantly enhances the output power quality.关键词
中点钳位型(NPC)/三电平并网逆变器/虚拟空间矢量脉宽调制(VSVPWM)/高调制度/虚拟中矢量/控制因子/模糊自适应Key words
neutral point clamped(NPC)/three-level grid-connected inverter/virtual space vector pulse width modulation(VSVPWM)/high modulation depth/virtual mid-vector/control factor/fuzzy adaptive分类
信息技术与安全科学引用本文复制引用
黄景涛,任师逸,苏怀奇,张鹏..中点电位快速均衡的模糊自适应VSVPWM策略[J].电力工程技术,2026,45(8):57-68,12.基金项目
国家自然科学基金资助项目(62172142) （62172142）
河南省科技攻关资助项目(242102240113) （242102240113）
