动态电压恢复器(dynamic voltage restorer,DVR)是设备侧有效治理电压暂降故障的装置,目前DVR的控制设计基本采用比例积分(proportional-integral,PI)控制器,但是DVR为非线性系统,传统PI控制器并不能达到理想的控制效果。为改善DVR的控...动态电压恢复器(dynamic voltage restorer,DVR)是设备侧有效治理电压暂降故障的装置,目前DVR的控制设计基本采用比例积分(proportional-integral,PI)控制器,但是DVR为非线性系统,传统PI控制器并不能达到理想的控制效果。为改善DVR的控制效果,提出一种新型电压电流双闭环分数阶PI(fractional order PI,FOPI)控制策略。首先,以光伏储能系统为DVR直流侧能量源,并建立相应的三相逆变器前馈解耦数学模型;其次,设计光伏储能系统与逆变器的双闭环PI控制策略,并进行参数整定;之后,将整数阶控制策略推广到分数阶来改善控制效果,并采用增益变化时的鲁棒性准则对FOPI控制器进行参数校正;最后,搭建不同控制策略下的DVR仿真模型,仿真结果验证了FOPI控制器应用于DVR系统的可行性,且相对于传统PI控制器其具备更好的动态响应速度与抗干扰性能。展开更多
This paper investigates the synchronization of a fractional order hyperchaotic system using passive control. A passive controller is designed, based on the properties of a passive system. Then the synchronization betw...This paper investigates the synchronization of a fractional order hyperchaotic system using passive control. A passive controller is designed, based on the properties of a passive system. Then the synchronization between two fractional order hyperchaotic systems under different initial conditions is realized, on the basis of the stability theorem for fractional order systems. Numerical simulations and circuitry simulations are presented to verify the analytical results.展开更多
文摘动态电压恢复器(dynamic voltage restorer,DVR)是设备侧有效治理电压暂降故障的装置,目前DVR的控制设计基本采用比例积分(proportional-integral,PI)控制器,但是DVR为非线性系统,传统PI控制器并不能达到理想的控制效果。为改善DVR的控制效果,提出一种新型电压电流双闭环分数阶PI(fractional order PI,FOPI)控制策略。首先,以光伏储能系统为DVR直流侧能量源,并建立相应的三相逆变器前馈解耦数学模型;其次,设计光伏储能系统与逆变器的双闭环PI控制策略,并进行参数整定;之后,将整数阶控制策略推广到分数阶来改善控制效果,并采用增益变化时的鲁棒性准则对FOPI控制器进行参数校正;最后,搭建不同控制策略下的DVR仿真模型,仿真结果验证了FOPI控制器应用于DVR系统的可行性,且相对于传统PI控制器其具备更好的动态响应速度与抗干扰性能。
文摘This paper investigates the synchronization of a fractional order hyperchaotic system using passive control. A passive controller is designed, based on the properties of a passive system. Then the synchronization between two fractional order hyperchaotic systems under different initial conditions is realized, on the basis of the stability theorem for fractional order systems. Numerical simulations and circuitry simulations are presented to verify the analytical results.