基于虚拟矢量调制的T型并网变换器模型预测控制  

Model Predictive Control for a T-type Grid-connected Converter Based on Virtual Vector Modulation

作　　者：叶登峰 陈浩[2] YE Dengfeng;CHEN Hao(Lishui Special Equipment Inspection Institute,Lishui 323000,Zhejiang,China;School of Information Engineering,Zhejiang University of Technology,Lishui 323000,Zhejiang,China)

机构地区：[1]丽水市特种设备检测院,浙江丽水323000 [2]浙江工业大学信息工程学院,浙江丽水323000

出　　处：《电气传动》2021年第1期28-33,共6页Electric Drive

基　　金：浙江省科研项目(Y201840468)。

摘　　要：针对传统有限集模型预测控制(FCS-MPC)开关频率不固定、寻优过程计算量大等缺点,提出了一种新型基于离散空间矢量调制的改进型模型预测控制算法,该方法通过采用由实矢量线性组合生成虚拟矢量的方式,实现了在单开关周期内输出多个实矢量和固定的开关频率;通过引入虚拟矢量调制增加了矢量控制集,有效减小了网侧电流纹波,改善了并网电流质量。给出了离散矢量调制的实现方案,并基于一台7 kW的实验样机平台进行了必要的实验验证分析。实验结果表明,与传统的FCS-MPC方法相比,所设计的虚拟矢量调制方法有效提高了网侧电流输出质量,有效抑制了网侧电流纹波并改善了系统动态响应性能。To improve the shortcomings of the traditional finite control set model predictive control(FCSMPC),that with the disadvantage of unfixed switching frequency and large amount of system calculation.A new type of modified model predictive control based on the discrete virtual vector modulation algorithm was presented.by using the method of the virtual vector generated by real vector linear combination,the presented FCS-MPC method can output more voltage vectors with fixed switching frequency in a single switching period.The ripple of grid-current was effectively reduced and the performance of system was improved.The realization scheme of discrete vector modulation was presented and the necessary experimental verification and analysis were carried out based on a 7 kWexperimental prototype platform.The experimental results show that compared with the conventional finite set model prediction method,the designed virtual vector modulation method can effectively improve the output quality of grid-current,effectively suppress the ripple and greatly improve the system dynamic response performance.

关 键 词：T型并网整流器 有限集模型预测控制 虚拟矢量 固定开关频率 

分 类 号：TM761[电气工程—电力系统及自动化]