摘要
针对传统空间矢量脉宽调制SVPWM(space vector pulse width modulation)单传感器相电流重构方法中电流不可观测区和零点漂移误差问题,提出1种误差自校正互补非零矢量脉冲宽度调制方法。通过对直流母线采样原理的分析,定义最短采样时间,用互补非零矢量代替零电压矢量,延长电流采样窗口,消除扇区边界不可观测区域;同时,揭示误差扩大效应的产生机理,采用互补非零矢量双采样对电流零点漂移进行检测和自校正,实现重构电流零点漂移的补偿。实验结果表明,所提方法重构误差低于1.26%,相电流THD低于6.15%。
Aimed at the problems of current unobservable area and zero drift error in the traditional space vector pulse width modulation with single-sensor phase current reconstruction method,an error self-correction complementary non-zero vector pulse width modulation method is proposed.Through the analysis of the DC bus sample principle,the minimum sample time is defined,the complementary non-zero vector is used to replace the zero voltage vector,and the current sampling window is extended,thus eliminating the sector boundary unobservable area.At the same time,the generation mechanism of error amplification effect is revealed,and the zero drift is detected and self-corrected by means of double-sampling complementary non-zero vector,which realizes the compensation for current zero drift reconstruction.Experimental results show that the reconstruction error of the proposed method was lower than 1.26%,and the phase current THD was lower than 6.15%.
作者
申永鹏
武克轩
梁伟华
吴成中
SHEN Yongpeng;WU Kexuan;LIANG Weihua;WU Chengzhong(School of Electrical and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China;National Engineering Research Center of RVC,Hunan University,Changsha 410082,China)
出处
《电源学报》
2025年第1期76-83,172,共9页
Journal of Power Supply
基金
国家自然科学基金青年科学基金资助项目(6180-3345)
河南省科技攻关资助项目(222102240005)
河南省青年骨干教师培养计划资助项目(2021GGJS089)。
关键词
单传感器
相电流重构
零点漂移
误差自校正互补非零矢量脉冲宽度调制
Single sensor
phase current reconstruction
zero drift
error self-correction complementary non-zero vector pulse width modulation
