可再生能源大规模、高密度的接入显著改变了电力系统静/动态特性,对系统建模、仿真、分析和控制带来了挑战。该文针对含不确定性的电力系统稳定性分析问题,引入微分包含理论,建立一种随机激励下电力系统低频振荡分析模型。针对含不确定...可再生能源大规模、高密度的接入显著改变了电力系统静/动态特性,对系统建模、仿真、分析和控制带来了挑战。该文针对含不确定性的电力系统稳定性分析问题,引入微分包含理论,建立一种随机激励下电力系统低频振荡分析模型。针对含不确定性的电力系统稳定性问题,采用线性多胞体(polytopic linear differential inclusion,PLDI)微分方法,将包含不确定性的随机激励表征为有限个元素的凸包。基于凸包李雅谱诺夫(Lyapunov)函数法推导多胞体系统稳定判据,并给出强阻尼系统约束条件;进而,基于Hankel范数逼近法,给出一种适用于大规模柔性互联系统的低频振荡分析方法。以简单两机系统、10机39节点系统验证所提出方法及稳定判据。仿真结果表明,该文所提方法能准确地刻画随机激励下的电力系统本质。展开更多
This paper is concerned with robust stabilization of stochastic differential inclusion systems with time delay. A nonlinear feedback law is established by using convex hull quadratic Lyapunov function such that the cl...This paper is concerned with robust stabilization of stochastic differential inclusion systems with time delay. A nonlinear feedback law is established by using convex hull quadratic Lyapunov function such that the closed-loop system is exponentially stable in mean square. Sufficient conditions for the existence of the feedback are obtained via linear matrix inequalities （LMIs）. An example is given to illustrate the effectiveness of the proposed method.展开更多
The tracking control of linear differential inclusion is discussed. First, the definition of uniformly ultimate boundedness for linear differential inclusion is given. Then, a feedback law is constructed by using the ...The tracking control of linear differential inclusion is discussed. First, the definition of uniformly ultimate boundedness for linear differential inclusion is given. Then, a feedback law is constructed by using the convex hull Lyapunov function. The sufficient condition is given to guarantee the tracking error system uniformly ultimately bounded. Finally, a numerical example is simulated to illustrate the effectiveness of this control design.展开更多
文摘可再生能源大规模、高密度的接入显著改变了电力系统静/动态特性,对系统建模、仿真、分析和控制带来了挑战。该文针对含不确定性的电力系统稳定性分析问题,引入微分包含理论,建立一种随机激励下电力系统低频振荡分析模型。针对含不确定性的电力系统稳定性问题,采用线性多胞体(polytopic linear differential inclusion,PLDI)微分方法,将包含不确定性的随机激励表征为有限个元素的凸包。基于凸包李雅谱诺夫(Lyapunov)函数法推导多胞体系统稳定判据,并给出强阻尼系统约束条件;进而,基于Hankel范数逼近法,给出一种适用于大规模柔性互联系统的低频振荡分析方法。以简单两机系统、10机39节点系统验证所提出方法及稳定判据。仿真结果表明,该文所提方法能准确地刻画随机激励下的电力系统本质。
基金supported by the National Natural Science Foundation of China (Nos. 60774011, 61074011, 61074003)
文摘This paper is concerned with robust stabilization of stochastic differential inclusion systems with time delay. A nonlinear feedback law is established by using convex hull quadratic Lyapunov function such that the closed-loop system is exponentially stable in mean square. Sufficient conditions for the existence of the feedback are obtained via linear matrix inequalities （LMIs）. An example is given to illustrate the effectiveness of the proposed method.
基金Project (No. 61074003) supported by the National Natural Science Foundation of China
文摘The tracking control of linear differential inclusion is discussed. First, the definition of uniformly ultimate boundedness for linear differential inclusion is given. Then, a feedback law is constructed by using the convex hull Lyapunov function. The sufficient condition is given to guarantee the tracking error system uniformly ultimately bounded. Finally, a numerical example is simulated to illustrate the effectiveness of this control design.
