基于模型预测的VIENNA整流器定频控制  

Fixed Operation Frequency of VIENNA Rectifier Based on the Model Prediction

作　　者：党超亮 同向前[1] DANG Chao-liang;TONG Xiang-qian(Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学,电气工程学院,陕西西安710048

出　　处：《电力电子技术》2021年第1期1-4,共4页Power Electronics

基　　金：西安理工大学校博士启动计划(119451120007);西安市科协青年人才托举计划(095920201306)。

摘　　要：针对传统有限控制集模型预测控制(FCS-MPC)开关频率不固定、网侧电流纹波含量大等缺陷,提出一种固定开关频率的基于最优开关序列合成的电流MPC方法。通过选取扇区内代价函数最小的3个相邻电压矢量合成最优电压矢量,并根据电压矢量的代价函数直接计算开关序列占空比,实现了FCS-MPC与空间电压矢量脉宽调制(SVPWM)策略的有机结合。为验证此处控制方案的有效性,基于一台满额功率为8 kW的三相三电平VIENNA整流器样机进行完整的测试分析,结果表明所提控制策略具有良好的稳态和动态性能。Aiming to the traditional finite control set model prediction control(FCS-MPC) switching frequency is not fixed,grid-current harmonic component large defects.A fixed switching frequency named cost function modulation based on the current MPC method is presented.It remains the merits of both the traditional model prediction control and space voltage vector pulse width modulation(SVPWM) modulation schemes to track the optimum voltage vector without increasing the computational burden.The optimal voltage vector is consisted by three adjacent voltage vector which minimizing the cost function,and according to the voltage vector switch sequence is calculated directly by the cost function of duty ratio,implements the FCS-MPC and SVPWM strategy of organic combination to test and verify the effectiveness of the control scheme,based on a full power of 8 kW three-phase three-level VIENNA rectifier prototype complete test analysis,the results show that the control strategy has good steady-state and dynamic performance.

关 键 词：整流器 开关频率 有限集模型预测 空间电压矢量脉宽调制 

分 类 号：TM461[电气工程—电器]