自动发电控制系统(Automatic Generation Control,AGC)的量测信号传输过程中存在不确定通信延时,使得区域互联电网成为时滞电力系统。针对信息物理融合下自动发电控制系统可能遭受的延时攻击,影响负荷频率控制(Load Frequency Control,L...自动发电控制系统(Automatic Generation Control,AGC)的量测信号传输过程中存在不确定通信延时,使得区域互联电网成为时滞电力系统。针对信息物理融合下自动发电控制系统可能遭受的延时攻击,影响负荷频率控制(Load Frequency Control,LFC)性能甚至导致系统频率失稳。该文提出了一种基于滑模扰动观测器的弹性负荷频率控制方案(Sliding Mode Perturbation Observer based Resilient Control Scheme,SMPORCS)。采用基于扰动估计的控制方法,设计了滑模扰动观测器(Sliding-Mode Perturbation Observer,SMPO),将延时攻击造成的扰动量孤立出来,并用观测器对其进行估计。设计闭环反馈方案,根据实时估计的结果,补偿延时攻击产生的扰动。在两区域电力系统中进行了仿真测试,结果表明,该方案与传统方案相比,在控制效果方面具有明显的优越性。展开更多
Load frequency is an important issue in power system operation and control. In this paper, load frequency control for suppression frequency deviation in an interconnected power system with nonlinearities using SMC (s...Load frequency is an important issue in power system operation and control. In this paper, load frequency control for suppression frequency deviation in an interconnected power system with nonlinearities using SMC (sliding mode control) is studied. The governor dead band and GRC (generation rate constraint) is considered in this article. Digit simulations for both two areas and three areas power system with non-reheat turbines are provided to validate the effectiveness of the proposed scheme. The results show that, the robustness of the control method under parameters variation and different load disturbances with the SMC technique.展开更多
文摘自动发电控制系统(Automatic Generation Control,AGC)的量测信号传输过程中存在不确定通信延时,使得区域互联电网成为时滞电力系统。针对信息物理融合下自动发电控制系统可能遭受的延时攻击,影响负荷频率控制(Load Frequency Control,LFC)性能甚至导致系统频率失稳。该文提出了一种基于滑模扰动观测器的弹性负荷频率控制方案(Sliding Mode Perturbation Observer based Resilient Control Scheme,SMPORCS)。采用基于扰动估计的控制方法,设计了滑模扰动观测器(Sliding-Mode Perturbation Observer,SMPO),将延时攻击造成的扰动量孤立出来,并用观测器对其进行估计。设计闭环反馈方案,根据实时估计的结果,补偿延时攻击产生的扰动。在两区域电力系统中进行了仿真测试,结果表明,该方案与传统方案相比,在控制效果方面具有明显的优越性。
文摘Load frequency is an important issue in power system operation and control. In this paper, load frequency control for suppression frequency deviation in an interconnected power system with nonlinearities using SMC (sliding mode control) is studied. The governor dead band and GRC (generation rate constraint) is considered in this article. Digit simulations for both two areas and three areas power system with non-reheat turbines are provided to validate the effectiveness of the proposed scheme. The results show that, the robustness of the control method under parameters variation and different load disturbances with the SMC technique.