Multirate systems are abundant in industry; for example, many soft-sensor design problems are related to modeling, parameter identification, or state estimation involving multirate systems. The study of multirate syst...Multirate systems are abundant in industry; for example, many soft-sensor design problems are related to modeling, parameter identification, or state estimation involving multirate systems. The study of multirate systems goes back to the early 1950's, and has become an active research area in systems and control. This paper briefly surveys the history of development in the area of multirate systems, and introduces some basic concepts and latest results on multirate systems, including a polynomial transformation technique and the lifting technique as tools for handling multirate systems, lifted state space models, parameter identification of dual-rate systems, how to determine fast single-rate models from dual-rate models and directly from dual-rate data, and a hierarchical identification method for general multirate systems. Finally, some further research topics for multirate systems are given.展开更多
针对双级式光伏并网发电前级变换器系统功率电压双闭环MPPT结构的控制器参数设计问题,基于前级变换器系统的等效电路,采用状态空间平均法建立了系统的非线性模型,进而采用平衡点附近线性化方法得到其线性模型。根据对象特性引入控制器结...针对双级式光伏并网发电前级变换器系统功率电压双闭环MPPT结构的控制器参数设计问题,基于前级变换器系统的等效电路,采用状态空间平均法建立了系统的非线性模型,进而采用平衡点附近线性化方法得到其线性模型。根据对象特性引入控制器结构,在频率特性和根轨迹分析的基础上,给出了前级控制器参数的系统化设计方法。12 k W双级式光伏并网发电系统仿真结果表明,在标准光强和模拟自然条件光强变化时,该控制器能快速实现前级MPPT跟踪控制及单位功率因数并网控制,获得了良好的动静态性能。展开更多
基金Supported by the Natural Sciences and Engineering Research Council of Canada and National Natural Science Foundation of P.R.China
文摘Multirate systems are abundant in industry; for example, many soft-sensor design problems are related to modeling, parameter identification, or state estimation involving multirate systems. The study of multirate systems goes back to the early 1950's, and has become an active research area in systems and control. This paper briefly surveys the history of development in the area of multirate systems, and introduces some basic concepts and latest results on multirate systems, including a polynomial transformation technique and the lifting technique as tools for handling multirate systems, lifted state space models, parameter identification of dual-rate systems, how to determine fast single-rate models from dual-rate models and directly from dual-rate data, and a hierarchical identification method for general multirate systems. Finally, some further research topics for multirate systems are given.
文摘针对双级式光伏并网发电前级变换器系统功率电压双闭环MPPT结构的控制器参数设计问题,基于前级变换器系统的等效电路,采用状态空间平均法建立了系统的非线性模型,进而采用平衡点附近线性化方法得到其线性模型。根据对象特性引入控制器结构,在频率特性和根轨迹分析的基础上,给出了前级控制器参数的系统化设计方法。12 k W双级式光伏并网发电系统仿真结果表明,在标准光强和模拟自然条件光强变化时,该控制器能快速实现前级MPPT跟踪控制及单位功率因数并网控制,获得了良好的动静态性能。
