不确定性电力系统鲁棒自适应励磁控制

摘要

To reduce the influence of uncertain parameters and the outside disturbance of the quality of power system in model and control design, Backstepping method is adopted to recursively construct the energy storage function which meets the dissipation inequalities of the closed-loop system,and a disturbance attenuation feedback controller is acheved. The storage function is proved to be the Lyapunov function,and the closed-loop system is ensured to be asymptotically stable. The uncertain parameters are substituted by the estimate values and the system is adaptive to uncertain parameters. The result of simulation shows that system with the proposed controller is adaptive to the uncertain parameters and is robust to the disturbance. The scheme is universal to the control design of such uncertain nonlinear systems.%为降低电力系统不确定参数和外部干扰在建模和控制设计中对系统品质的影响,利用Backstepping方法,递归构造闭环系统耗散不等式的能量存储函数,进而得到具有干扰抑制的反馈控制.推证了存储函数又是Lyapunov函数,保证闭环系统渐进稳定.设计过程用估计值代替不确定参数,故系统对不确定参数具有适应能力.仿真结果表明,该控制器作用下系统对未知参数具有自适应性并对干扰具有鲁棒性.设计方案对此类不确定非线性系统的控制设计具有一定的普遍性.