电工技术学报2018，Vol.33Issue(8)：1827-1834,8.DOI:10.19595/j.cnki.1000-6753.tces.161978
基于无差拍控制的T型三电平逆变器中点电位平衡策略
A Neutral Point Potential Balancing Strategy for Three-Level T-Type Inverter Based on Deadbeat Control
摘要
Abstract
To solve the problem of neutral point (NP) potential unbalancing of three-level T-type inverter, this paper puts forward a NP potential balancing strategy based on deadbeat control algorithm. Firstly, a mathematical relationship among NP potential variation, phase current and duty cycle of switch vectors was built. Then, an evaluation index describing the ability of regulating NP potential of short vector was introduced, i.e. when two short vectors existed simultaneously, different switching modulation methods were chosen through comparing their regulation capabilities. Thereby, a NP potential balancing method based on a deadbeat control algorithm was established. The duty cycle of the short vector, whose regulation ability was stronger, was adjusted to fast realize the NP potential balancing. The simulation and experimental results show that the proposed method has a good performance on NP potential balancing. It can suppress the NP potential fluctuation while reducing the harmonics of output voltage and current.关键词
T型三电平逆变器/中点电位平衡/调节能力/空间矢量脉宽调制/小矢量/无差拍控制Key words
Three-level T-type inverter/neutral point potential balancing/regulation ability/space vector pulse width modulation/short vector/deadbeat control分类
信息技术与安全科学引用本文复制引用
冯腾,康龙云,胡毕华,冯元彬..基于无差拍控制的T型三电平逆变器中点电位平衡策略[J].电工技术学报,2018,33(8):1827-1834,8.基金项目
广东省重大科技项目(2014B010125002)和东莞市引进创新科研团队计划(2014607119)资助. （2014B010125002）
