高电压技术2024，Vol.50Issue(3)：1205-1213,9.DOI:10.13336/j.1003-6520.hve.20220781
不对称三单元十三电平逆变器拓扑及其调制策略
Topology and Modulation Strategy of Asymmetric Three-unit Thirteen-level Inverter
摘要
Abstract
Compared with symmetrical cascade H-bridge multilevel inverters,hybrid cascade H-bridge multilevel in-verters can use fewer H-bridge units to obtain higher output voltage.However,the traditional hybrid cascade H-bridge multilevel inverters have the phenomenon of current inversion during the unit time.In order to solve the above problems,this paper improves the type Ⅲ inverters with 1:3 voltage ratio,and puts forward a kind of asymmetric three-unit 13-level inverters with 3:2:1 voltage ratio.At the same time,a hybrid modulation strategy is proposed for the inverter,which combines the advantages of ladder wave and PWM wave.The partial pulses obtained under this modulation strat-egy are logically calculated and distributed,which solves the problem of current inversion in traditional type Ⅲ inverters and improves the power quality of output voltage.With this hybrid modulation strategy,the high-voltage unit works at a lower frequency and the low-voltage unit works at a higher frequency to ensure the output voltage quality of the inverter.Finally,the validity and feasibility of the proposed inverter topology and the hybrid modulation strategy are verified by simulation and experiment.关键词
多电平逆变器/拓扑优化/混合调制/逻辑运算/电流倒灌Key words
multilevel inverter/topological optimization/hybrid modulation/logical operation/current inversion引用本文复制引用
胡文华,余书琨,熊志磊,郭嘉敏,丁文斌,刘智雄..不对称三单元十三电平逆变器拓扑及其调制策略[J].高电压技术,2024,50(3):1205-1213,9.基金项目
国家自然科学基金(52067007) （52067007）
江西省教育厅科学技术研究项目(GJJ200611). Project supported by National Natural Science Foundation of China(52067007),Science and Technology Research Project of Jiangxi Provincial Department of Education(GJJ200611). （GJJ200611）
