中国电机工程学报2025，Vol.45Issue(4)：1550-1562,中插27,14.DOI:10.13334/j.0258-8013.pcsee.232095
三电平多相H桥变频器中点电压调控方法
Neutral-point Voltage Control Method of Three-level Multi-phase H-bridge Inverter
摘要
Abstract
The unbalanced capacitor voltage will lead to the inconsistent pressure of the internal and external switches of the three-level converter topology,resulting in the distortion of the output voltage,which seriously affects the safe and stable operation of the device.In this paper,the neutral point voltage regulation of the multi-phase three-level H-bridge converter for ship propulsion is studied.First,the causes of neutral point voltage imbalance in three-level H-bridge inverter circuit are analyzed.Then,a conventional neutral-point voltage control method suitable for three-level multi-phase H-bridge topology is studied.However,the controllable region of neutral-point voltage under this method is limited by load power factor,thereby limiting the balance ability of low-speed and low-power factors.On this basis,a neutral-point voltage balance control method under full power factor range is proposed.The injected zero-sequence component is determined according to the voltage signal sector,and then the component in phase with the load current is added,which has faster balance speed and higher steady-state accuracy under low power factor conditions.Finally,the feasibility and correctness of the optimization method are verified by simulation and experiment.关键词
三电平H桥/中点电压控制/零序电压/全功率因数/多相推进电机Key words
three-level H-bridge/the midpoint voltage control/zero-sequence voltage/full power factor/multiphase propulsion motor分类
信息技术与安全科学引用本文复制引用
裘呈熠,胡亮灯,郭城,鲁斌,龙齐杰..三电平多相H桥变频器中点电压调控方法[J].中国电机工程学报,2025,45(4):1550-1562,中插27,14.基金项目
国家自然科学基金项目(51907200) （51907200）
国防基础加强基金(2022-JCJQ-JJ-0537). Project Supported by National Natural Science Foundation of China(51907200) （2022-JCJQ-JJ-0537）
National Defense Strengthening Foundation Plan of China(2022-JCJQ-JJ-0537). （2022-JCJQ-JJ-0537）
