电力系统保护与控制2026，Vol.54Issue(1)：94-104,11.DOI:10.19783/j.cnki.pspc.250328
T型三电平逆变器混合脉冲宽度调制相电流重构策略
Phase current reconstruction strategy with hybrid pulse width modulation for T-type three-level inverters
摘要
Abstract
Aiming at the problem of unobservable areas of neutral current in conventional space vector pulse width modulation for T-type three-level inverters,a hybrid pulse width modulation-based phase current reconstruction strategy is proposed.First,the sampling mechanism of the neutral current and the formation mechanism of unobservable areas are analyzed,and the unobservable areas are classified according to the minimum sampling time.Second,based on the principles of volt-second balancing and composite zero vector,different compensation voltage vectors are inserted into the unobservable areas to compensate for the observable duration of the observable voltage vectors.Meanwhile,the original switching sequence is adjusted to offset the effects of the compensation voltage vectors,thereby ensuring that the magnitude and angle of the reference voltage vector remain unchanged.Ultimately,the proposed strategy eliminates the unobservable areas of the neutral current,enabling stable and accurate detection of the neutral current.Experimental results show that the proposed method achieves complete reconstruction of three-phase currents,with the total harmonic distortion of phase currents below 3.30%.关键词
T型三电平逆变器/中点电流/相电流重构/不可观测区域/电压矢量Key words
T-type three-level inverter/neutral current/phase current reconstruction/unobservable areas/voltage vector引用本文复制引用
申永鹏,郭海东,刘普,刘刚,孙健,王延峰..T型三电平逆变器混合脉冲宽度调制相电流重构策略[J].电力系统保护与控制,2026,54(1):94-104,11.基金项目
This work is supported by the Key Research and Development Special Program of Henan Province(No.241111242300). 河南省重点研发专项资助(241111242300) （No.241111242300）
国家自然科学基金面上项目资助(62273313) （62273313）
中原青年拔尖人才项目资助 （）
河南省高校科技创新人才支持计划项目资助(24HASTIT046) （24HASTIT046）
