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.
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)
出处
《电力电子技术》
CSCD
北大核心
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)。
关键词
固态变压器
变换器
模型预测电流控制
solid-state transformer
converter
model predictive current control
