文章摘要
吴春,杨佳磊.准Z源逆变器自适应级联模型预测控制[J].高技术通讯(中文),2021,31(10):1065~1074
准Z源逆变器自适应级联模型预测控制
Adaptive sequential-model predictive control for quasi-Z-source inverter
  
DOI:10.3772/j.issn.1002-0470.2021.10.007
中文关键词: 准Z源逆变器(qZSI); 有限集模型预测控制(FCS-MPC); 自适应级联模型预测控制(AS-MPC); 权重系数; 参数鲁棒性
英文关键词: quasi-Z-source inverter (qZSI), finite control set-model predictive control (FCS-MPC), adaptive sequential-model predictive control (AS-MPC), weighting factor, parameter robustness
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作者单位
吴春  
杨佳磊  
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中文摘要:
      针对准Z源逆变器(qZSI)系统中有限集模型预测控制(FCS-MPC)策略存在权重系数调整繁琐和控制性能依赖于准确模型参数的问题,提出一种适用于qZSI的自适应级联模型预测控制(AS-MPC)策略。该策略根据被控对象的优先级,依次计算各自对应的代价函数,从而消除了权重系数。同时,针对负载电气参数摄动,将其当做系统总扰动,用自适应方法进行估计并更新控制律,因此所提策略无需依赖准确负载电气参数,从而提高了系统对负载电气参数摄动的鲁棒性。实验结果表明,AS-MPC策略无需设计权重系数,结构简单,且电感电流、电容电压和输出电流控制性能优异,输出电流谐波小,动态响应快,对参数摄动鲁棒性强。
英文摘要:
      To solve the problems of the complex design of weighting factors and the control performance depending on accurate model parameters of the finite control set-model predictive control (FCS-MPC) strategy for a quasi-Z-source inverter (qZSI), an adaptive sequential-model predictive control (AS-MPC) strategy is proposed. In AS-MPC strategy, according to the priorities of the selected control objects, the corresponding cost functions are sequentially calculated. By this way, the weighting factors can be eliminated in AS-MPC. In addition, for the parameter perturbation of the load, the total disturbances are modeled accounting for the parameter errors and estimated using an adaptive control method. Therefore, AS-MPC strategy does not rely on accurate parameters, which improves the parameter robustness of the system. The experimental results show that AS-MPC strategy does not need to design the weight factors. Besides, the inductor current, capacitor voltage and output current can achieve excellent control performances, including low output current harmonic, fast dynamic response, and strong robustness against load’s parameter perturbation.
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