基于观测器的仿射型多机耦合电力系统H_∞模糊跟踪控制  

H_∞ Fuzzy Tracking Control for the Affine Multi-machine Interconnected Power System Based on Observers

作　　者：窦春霞[1] 

机构地区：[1]燕山大学电气工程学院,秦皇岛066004

出　　处：《电工技术学报》2004年第3期31-35,45,共6页Transactions of China Electrotechnical Society

基　　金：国家自然基金资助项目(60102002);河北省基金资助项目(6011224);霍英东基金资助项目(81057)。

摘　　要：模型未知的仿射型多机耦合电力系统用一系列T-S模糊模型逼近,且模糊模型的结论部分具有常数偏差项。由于系统状态具有不可测性,采用模糊观测器来估计系统的状态。基于该系列模糊模型和观测器,考虑仿射模型固有的常数项偏差,提出一种新型H模糊跟踪控制方法,并用线性矩阵不等式的凸优化方法求解控制器参数,实现了仿射型多机耦合电力系统的稳定跟踪控制。仿真验证了方案的有效性。Because the multi-machine power system is a multidimensional interconnected nonlinear system and the affine models of the system have constant bias term ,it is difficult to achieve a stable tracking control for the affine multi-machine power system by the traditional control methods. However every single-machine subsystem of the power system can be approximated by a set of T-S fuzzy models in this paper, the consequent part of every model has a constant bias term, every fuzzy model represents a linearized model of the subsystem corresponding to the operating point of the controlled system. Due to the unmeasurability of the subsystem, Fuzzy observers are proposed to estimate their states. Based on these fuzzy models and observers, considering the constant bias terms, a new H fuzzy tracking control scheme is designed. The robust tracking control for the affine multi-machine interconnected power system is achieved by this scheme. The parameters of controller are solved by using convex optimization techniques of LMI. The gradual stability of the control system is also guaranteed. The stable tracking performances are verified by simulation examples.

关 键 词：电力系统 模糊模型 模糊观测器 H∞模糊跟踪控制 线性矩阵不等式 

分 类 号：TM712[电气工程—电力系统及自动化]