Model Predictive Current Control with Fixed Switching Frequency and Dead-Time Compensation for Single-Phase PWM Rectifier

被引:14
|
作者
Kang, Longyun [1 ,2 ]
Zhang, Jianbin [1 ,2 ]
Zhou, Hailan [1 ,2 ]
Zhao, Zixian [1 ,2 ]
Duan, Xinwei [1 ,2 ]
机构
[1] South China Univ Technol, Sch Elect Power, New Energy Res Ctr, Guangzhou 510640, Peoples R China
[2] South China Univ Technol, Sch Elect Power, Guangdong Key Lab Clean Energy Technol, Guangzhou 510640, Peoples R China
关键词
single-phase PWM rectifier; model predictive current control; fixed switching frequency; dead-time compensation;
D O I
10.3390/electronics10040426
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
The research object of this paper is single-phase PWM rectifier, the purpose is to reduce the total harmonic distortion (THD) of the grid-side current. A model predictive current control (MPCC) with fixed switching frequency and dead-time compensation is proposed. First, a combination of an effective vector and two zero vectors is used to fix the switching frequency, and a current prediction equation based on the effective vector's optimal action time is derived. The optimal action time is resolved from the cost function. Furthermore, in order to perfect the established prediction model and suppress the current waveform distortion as a consequence of the dead-time effect, the dead-time's influence on the switching vector's action time is analyzed, and the current prediction equation is revised. According to the experimental results, the conclusion is that, firstly, compared with finite-control-set model predictive control, proportional-integral-based instantaneous current control (PI-ICC) scheme and model predictive direct power control (MP-DPC), the proposed MPCC has the lowest current THD. In addition, the proposed MPCC has a shorter execution time than MP-DPC and has fewer adjusted parameters than PI-ICC. In addition, the dead-time compensation scheme successfully suppresses the zero-current clamping effects, and reduce the current THD.
引用
收藏
页码:1 / 21
页数:21
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