【摘要】 VIENNA整流器由于具有便于模块化、高功率密度、输出性能良好等优势,在站级快速充电电源、绿色数据中心、航空电源等方面获得广泛关注。有限集模型预测控制(FCS-MPC)作为一种性能优良的多目标控制算法,具有诸多优点,如控制算法简单,响应速度快,因此较适用于VIENNA整流电源控制系统。然而,传统FCSMPC中单开关周期内电压矢量集较少,作用单一矢量造成开关频率不固定,严重影响并网电流质量。基于此,提出一种基于混合电压矢量的模型预测控制策略,利用实矢量线性合成虚拟电压矢量的方式增加单周期内的电压矢量个数,使得跟踪误差得到减小的同时有效抑制电网电流纹波。最后,从静态、暂态等方面进行了仿真与实验分析验证。更多还原

【Abstract】 VIENNA rectifier has attracted wide attention in station-level fast charging power supply,green data center,aviation power supply and other aspects because of its advantages such as easy modularization,high power density and good output performance.As a multi-objective control algorithm with excellent performance,finite control set-model predictive control(FCS-MPC) has many advantages,such as simple control algorithm and fast response.Therefore,it is more suitable for VIENNA rectifier power supply control system.However,in traditional FCS-MPC,there are few voltage vectors in single switching cycle,which seriously affects the quality of grid-connected current due to unstable switching frequency caused by a single vector.Based on this,a model predictive control strategy based on hybrid voltage vector is proposed,which uses real vector to linearly synthesize virtual voltage vector to increase the number of voltage vectors in a single cycle,as a result,the tracking error is reduced and the grid current ripple is suppressed effectively.Finally,the simulation and experimental analysis are carried out from the aspects of static and transient.更多还原