基于传统的比例—积分控制,提出了统一潮流控制器(unified power flow controller,UPFC)并、串联侧解耦的系统级控制策略,其控制目的是在并联侧维持UPFC并入点的交流电压和直流侧电容电压,在串联侧控制线路有功、无功潮流。文章首先介...基于传统的比例—积分控制,提出了统一潮流控制器(unified power flow controller,UPFC)并、串联侧解耦的系统级控制策略,其控制目的是在并联侧维持UPFC并入点的交流电压和直流侧电容电压,在串联侧控制线路有功、无功潮流。文章首先介绍了所研制的UPFC实验系统平台,并在此基础上详细地给出了UPFC系统级控制器的硬件实现,实验平台的通用性决定了不同控制策略可以较容易地实现。为验证所提出的控制策略的控制效果,文中将UPFC实验装置嵌入至自行搭制的等效双机实验系统中,实验结果与PSCAD/EMTDC仿真环境下的时域动态仿真结果十分相似,从而得到了良好的UPFC动态特性。展开更多
Precise position tracking control of the single-rod pneumatic actuator is considered and a nonlinear cascade controller is developed.The proposed controller comprises an extended disturbance observer(EDOB)and a nonlin...Precise position tracking control of the single-rod pneumatic actuator is considered and a nonlinear cascade controller is developed.The proposed controller comprises an extended disturbance observer(EDOB)and a nonlinear robust control law synthesized by the backstepping method.The EDOB is designed to estimate not only the influence of disturbances but also the parameter uncertainties.With the use of parameter and disturbance estimates,the nonlinear cascade controller,which consists of an outer position tracking loop and an inner load pressure loop,is further designed to attenuate the effects of parameter and disturbance estimation errors.The stability of the closed-loop system is proven by means of Lyapunov theory.Extensive comparative experimental results obtained verify the effectiveness of the proposed nonlinear cascade controller and its performance robustness to parameter and external disturbance variations in practical implementation.展开更多
文摘基于传统的比例—积分控制,提出了统一潮流控制器(unified power flow controller,UPFC)并、串联侧解耦的系统级控制策略,其控制目的是在并联侧维持UPFC并入点的交流电压和直流侧电容电压,在串联侧控制线路有功、无功潮流。文章首先介绍了所研制的UPFC实验系统平台,并在此基础上详细地给出了UPFC系统级控制器的硬件实现,实验平台的通用性决定了不同控制策略可以较容易地实现。为验证所提出的控制策略的控制效果,文中将UPFC实验装置嵌入至自行搭制的等效双机实验系统中,实验结果与PSCAD/EMTDC仿真环境下的时域动态仿真结果十分相似,从而得到了良好的UPFC动态特性。
基金Project(51505474)supported by the National Natural Science Foundation of ChinaProject(2015XKMS020)supported by the Fundamental Research Funds for the Central Universities,China+1 种基金Project(2016T90520)supported by the China Postdoctoral Science FoundationProject supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions,China
文摘Precise position tracking control of the single-rod pneumatic actuator is considered and a nonlinear cascade controller is developed.The proposed controller comprises an extended disturbance observer(EDOB)and a nonlinear robust control law synthesized by the backstepping method.The EDOB is designed to estimate not only the influence of disturbances but also the parameter uncertainties.With the use of parameter and disturbance estimates,the nonlinear cascade controller,which consists of an outer position tracking loop and an inner load pressure loop,is further designed to attenuate the effects of parameter and disturbance estimation errors.The stability of the closed-loop system is proven by means of Lyapunov theory.Extensive comparative experimental results obtained verify the effectiveness of the proposed nonlinear cascade controller and its performance robustness to parameter and external disturbance variations in practical implementation.
