三相单级隔离型AC/DC变换器预测电流控制  

Model Predictive Current Control With Grouping Optimization for Three-phase Single-stage Isolated AC/DC Converter

作　　者：李春杰 马红建 赵明伟 柴艳莉 LI Chun-jie;MA Hong-jian;ZHAO Ming-wei;CHAI Yan-li(Jiangsu Normal University,Xuzhou 221116,China)

机构地区：[1]江苏师范大学电气工程及自动化学院,江苏徐州221116

出　　处：《电力电子技术》2022年第12期48-50,55,共4页Power Electronics

基　　金：国家自然科学基金(51707085);江苏师范大学研究生科研与实践创新计划(2021XKT0147)。

摘　　要：固态变压器(SST)拓扑结构通常采用传统双闭环比例积分(PI)控制,网侧电流存在较大谐波及静差,针对此,对一种SST拓扑结构-三相单级隔离型AC/DC变换器的控制策略进行改进,提出了引入有延时补偿的模型预测电流控制(MPCC),改善了系统的动态性能,消除了静差,减小了网侧电流谐波。为了降低系统的运算量,采用分组寻优的方法优化移相占空比。最后,给出了分组寻优模型预测控制(MPC)的仿真和实验结果,验证了分组寻优MPC方法的可行性。The topology of solid-state transformer(SST) usually adopts the traditional double closed-loop proportionalintegral(PI) control,in which,there are large harmonics and static errors in the grid-side current.To solve these,the control strategy of a three-phase single-stage isolated AC/DC converter for a solid-state transformer is improved,the model predictive current control(MPCC) with time-delay compensation in the inner current loop is put forward,which improves the dynamic performance of the system,eliminates the steady error and reduces the grid-current harmonics.To reduce the system computation,the phase-shift duty cycle is optimized by a grouping optimization method.Finally,the simulation and experimental waveforms of group optimization model predictive control(MPC) are given to verify the feasibility of the grouping optimization model predictive control(MPC) method.

关 键 词：固态变压器 变换器 模型预测电流控制 

分 类 号：TM4[电气工程—电器]