准Z源逆变器的模型预测电流误差控制  

Model Predictive Current Error Control for Quasi Z-source Inverter

作　　者：许宇豪 李文真 肖海峰 贺昱曜[3] 康雪娟 XU Yuhao;LI Wenzhen;XIAO Haifeng;HE Yuyao;KANG Xuejuan(School of Electronics Engineering,Xi’an Aeronautical Institute,Xi’an 710077,China;School of Vehicle Engineering,Xi’an Aeronautical Institute,Xi’an 710077,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西安航空学院电子工程学院,西安710077 [2]西安航空学院车辆工程学院,西安710077 [3]西北工业大学航海学院,西安710072

出　　处：《电力系统及其自动化学报》2024年第3期142-150,共9页Proceedings of the CSU-EPSA

基　　金：陕西省科技厅项目(2020JM-632);西安航空学院科研基金资助项目(2021KY0208);西安航空学院高等教育教学改革研究项目(21JXGG2016)。

摘　　要：为降低准Z源逆变器模型预测控制的控制误差,提出一种模型预测电流误差控制方法。首先,在充分分析电压矢量对被控量性能影响的基础上,合理地选择适合各被控量的电压矢量组合方式。然后,利用电流对称控制思想保证电感电流关于其参考指令对称。最后,采用电压矢量抵消原理使输出电流幅值逼近其目标值。实验结果表明,所提方法能够大幅降低电感电流脉动和输出电流谐波含量;证明了所提方法能有效提高准Z源逆变器的控制精度,简化了对权重系数的设计工作。To reduce the control error of model predictive control(MPC)for a quasi Z-source inverter,a model predictive current error control method is proposed in this paper.First,the influence of voltage vector on the performance of controlled variables is analyzed in detail,so that the voltage vector combination suitable for each controlled variable is reasonably selected.Second,the idea of current symmetry control is used to ensure that the inductor current is symmetrical about its reference.Finally,the output current amplitude is close to its target value by using the principle of voltage vector cancellation.Experimental results indicate that the inductor current ripple and the harmonic content in output current can be significantly reduced by using the proposed method.It is concluded that this method is effective in improving the control accuracy of quasi-Z source inverter and can simplify the design of weighting factor.

关 键 词：模型预测控制 准Z源逆变器 电感电流脉动 输出电流谐波 

分 类 号：TM13[电气工程—电工理论与新技术]