电气传动2017，Vol.47Issue(9)：29-34,39,7.DOI:10.19457/j.1001-2095.20170906
三电平ANPC逆变器中点电压平衡的VSVPWM控制策略
VSVPWM Strategy for Three-level Active NPC Inverter Neutral Point Potential Balance
摘要
Abstract
An improved virtual space vector PWM(VSVPWM)strategy was proposed to balance the neutral-point potential(NP)for three-level active neutral-point-clamped(ANPC)inverter. The improved virtual vectors′synthesis method was based on the VSVPWM strategy. According to the NP offset and three-phase currents,when the modulation index was lower,the partition coefficient of a pair of short vectors could be recalculated,and when the modulation index was high,the appropriate improved virtual medium vectors which produce different neutral point current could be reselected in the next fundamental period. Therefore,the NP could be controlled effectively. This strategy can balance the NP wherever the reference vector locates in the space vector diagram(SVD). Lastly, simulation and experimental results are provided to verify the effectiveness of the proposed control strategy.关键词
三电平逆变器/有源中点钳位/中点电压/虚拟空间矢量调制Key words
three-level inverter/active neutral-point-clamped/neutral point potential/virtual space vector pulse-width modulation分类
信息技术与安全科学引用本文复制引用
马大俊,胡存刚,王群京,张超..三电平ANPC逆变器中点电压平衡的VSVPWM控制策略[J].电气传动,2017,47(9):29-34,39,7.基金项目
国家自然科学基金资助项目(51307002) （51307002）
安徽省高校自然科学研究重大项目(KJ2016SD02) （KJ2016SD02）
