电气传动2025，Vol.55Issue(7)：3-12,10.DOI:10.19457/j.1001-2095.dqcd25854
基于全范围七段式SVPWM的三电平逆变器中点电位平衡策略
A Neutral Point Potential Balancing Strategy for a Three-level Inverter Based on Full-range Seven-segment SVPWM
摘要
Abstract
Space vector pulse width modulation(SVPWM)strategy is one of the key technologies for three-level inverters.However,conventional three-level SVPWM often experiences neutral point potential(NPP)oscillation and high switching loss when addressing the neutral point potential balancing issue.To tackle this challenge,firstly,the fundamental principles of the traditional nearest three vector(NTV)synthesis strategy and the virtual space vector pulse width modulation(VSVPWM)strategy were reviewed.And then,the drawbacks of the NTV approach based on the conventional region partitioning method was analyzed.A dynamic partitioning method was proposed to resolve the neutral point potential offset caused by conventional partitioning.Furthermore,to counteract the NPP oscillation of the NTV under high modulation,a strategy that employs a synthesis of four-effective voltage vectors was introduced.Compared to VSVPWM,the proposed strategy significantly reduced the inverter's switching loss.Ultimately,the effectiveness and superiority of the proposed algorithm were validated through experimental results.关键词
三电平逆变器/中点电位平衡/开关损耗/七段式/动态分区Key words
three-level inverter/neutral point potential(NPP)balance/switching loss/seven-segment/dynamic partition分类
信息技术与安全科学引用本文复制引用
杨国涛,胡东方,张珈铭,文立强,田里思..基于全范围七段式SVPWM的三电平逆变器中点电位平衡策略[J].电气传动,2025,55(7):3-12,10.基金项目
国家自然科学基金(62373363,62003349) （62373363,62003349）
中国矿业大学教学研究重点项目(2022ZDKT03-209) （2022ZDKT03-209）
