摘要
提出了一种单相Z源逆变器控制策略,该策略由Z源网络电压控制环、交流侧电压瞬时控制环和直流侧电压纹波前馈控制环3部分组成.由于Z源阻抗网络存在非最小相位效应,因此在Z源网络电压闭环控制基础上引入了交流侧瞬时控制,使逆变器获得了较快的响应速度.针对负载较重时Z源网络输出电压波动大的问题,通过电压纹波前馈控制修正调制比,有效抑制了直流侧电压纹波对交流侧的影响,提高了输出交流电压的波形质量.仿真及实验结果均证实了所提出的控制策略的有效性.
The control strategy for single-phase Z-source inverter,which consisted of Z-source network voltage feedback,ac-side instantaneous feedback and voltage ripple feed-forward loop,was presented.Due to the non-minimum-phase effect of Z-source network,an ac-side instantaneous controller was incorporated based on the Z-source network voltage feedback loop to guarantee fast dynamic response.The Z-source network has voltage ripple during operating with the heavy load,which decreases the performance of the output voltage.The proposed voltage ripple feed-forward controller could modify the modulation index,thus the effects were prevented from propagating into the ac-side and hence the quality of the output ac voltage waveform was improved.Both computer simulation and experimental results verify the effectiveness of the proposed strategy.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2010年第3期357-362,共6页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家863计划资助项目(2006AA11A145)
关键词
Z源逆变器
瞬时值控制
前馈控制
正弦脉宽调制
Z-source inverter
instantaneous control
feed-forward control
sinusoidal pulse width modulation
