摘要
模型预测控制具有便于植入、可实现多目标跟踪等优点,但是传统的模型预测控制算法开关状态不固定,会降低电流跟踪精度,甚至产生较大的电流纹波.基于此,提出了一种基于模型预测直接功率定频控制(DPCMPC)和滑模(sliding-mode control,SMC)外环控制的双闭环控制方法.利用SMC外环得到系统有功功率的给定值,通过引入零电压矢量改善系统稳态性能,减小功率脉动.为验证理论分析的正确性,构建了完整的仿真与实验测试模型,结果表明该控制方法具有良好的稳态和动态性能.
Model predictive control(MPC)has been widely used in grid-connected converter control systems with the advantages,such as easy implantation and multi-target tracking.However,the unfixed switching state of the traditional model predictive control algorithm will reduce the accuracy of current tracking and even produce large current ripple.Therefore,a double closed loop control method based on model predictive direct power fixed frequency control(DPCMPC)and sliding mode control(SMC)is proposed.The SMC outer ring is used to obtain a given value of the active power of the system,and the steady-state performance of the system is improved by introducing a zero voltage vector and the power ripple is reduced.In order to verify the theoretical analysis,a complete simulation and experimental test model was constructed,and the results show that the proposed control method has good steady-state and dynamic performance.
作者
姜雅飞
赵刚
JIANG Ya-fei;ZHAO Gang(Marine Engineering Department,Jiangsu Shipping College,Nantong 226010,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《兰州理工大学学报》
CAS
北大核心
2023年第4期82-87,共6页
Journal of Lanzhou University of Technology
关键词
T型变换器
模型预测控制
滑模控制
直接功率控制
定频控制
T-type grid-connected converter
finite set model predictive
sliding mode control
direct power control
fixed frequency control
