电力系统保护与控制2026，Vol.54Issue(16)：120-131,12.DOI:10.19783/j.cnki.pspc.260119
消除直流母线负电流的混合脉冲宽度调制相电流重构策略
A hybrid PWM-based phase current reconstruction strategy for eliminating negative DC-link current
摘要
Abstract
To address the negative DC-link current generated in two-level inverters during single-sensor phase current reconstruction using the traditional measurement vector method,this paper first analyzes the relationship between PWM pulses and phase current angles corresponding to different voltage vectors.By defining source-type and sink-type voltage vectors,the mechanism behind the generation of negative DC-link current in the traditional measurement vector method and its detrimental effects are revealed.Subsequently,by adjusting the pulse widths of two-phase PWM signals and dynamically inserting source-type and sink-type voltage vectors in unobservable regions,a hybrid PWM phase current reconstruction strategy is proposed,which effectively eliminates the negative DC-link current.Finally,experimental results under various operating conditions demonstrate that the proposed method effectively eliminates negative DC-link current,reduces DC-link voltage fluctuations,and minimizes the impact of zero-drift on reconstruction accuracy.The total harmonic distortion of the phase current is below 3.24%,while the reconstruction error is less than 3.45%.关键词
两电平逆变器/直流母线负电流/相电流重构/不可观测区/混合脉冲宽度调制Key words
two-level inverter/negative DC-link current/phase current reconstruction/unobservable region/hybrid PWM引用本文复制引用
申永鹏,郭科怡,伍敏,刘普,刘刚..消除直流母线负电流的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(16):120-131,12.基金项目
This work is supported by the Key Research and Development Special Project 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(24HASTIT046) （24HASTIT046）
