基于模糊观测器的多机耦合电力系统H_∞跟踪控制  

H_∞ TRACKING CONTROL OF MULTI-MACHINE INTERCONNECTED POWER SYSTEM BASED ON FUZZY OBSERVERS

作　　者：窦春霞[1] 吴忠强[1] 

机构地区：[1]燕山大学电气工程学院,河北省秦皇岛市066004

出　　处：《电网技术》2004年第1期15-18,共4页Power System Technology

基　　金：国家自然科学基金资助项目(60102002);霍英东基金资助项目(81057)。

摘　　要：将多机耦合电力系统的每个单机子系统用一系列模糊逻辑模型逼近,每个模糊逻辑模型代表子系统在特定运行点的局部线性化模型,并采用模糊观测器来估计子系统的状态。基于该系列带有观测器的模糊模型,采用H∞模糊跟踪控制方法实现了多机耦合电力系统的稳定跟踪控制,并用线性矩阵不等式的凸优化方法求解控制器参数,以确保系统的全局渐近稳定性。仿真验证了方案的有效性。Because multi-machine power system is a huge-dimensions interconnected nonlinear system, it is difficult to achieve stable tracking control for the system. However every singly-machine subsystem of the power system can be approximated by a set of fuzzy models, each fuzzy model represents a locally linearized model of the subsystem corresponding to the operating point of the controlled system. Considering the unmeasurability of the subsystem states, a fuzzy observer is applied to estimate these states. Based on these fuzzy models with observer, the tracking control for the multi-machine interconnected power system is achieved by the H∞, fuzzy tracking control scheme, the parameters of controller are obtained by using convex optimization techniques of linear matrix inequalities (LMI) to ensure the global asymptotic stability of the power system. The stable tracking performances are verified by simulation examples.

关 键 词：多机耦合电力系统 H∞跟踪控制 模糊观测器 模糊模型 稳定控制 

分 类 号：TM712[电气工程—电力系统及自动化]