基于扩张状态观测器的多机系统非线性协调控制  

ESO-based decentralized nonlinear coordinated controller of multimachine power systems

作　　者：余涛[1] 沈善德[1] 李东海[2] 朱守真[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]清华大学热能工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2004年第1期97-101,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50277021)

摘　　要：针对精确反馈线性化(EFL)的非线性控制器鲁棒性差、结构复杂的缺点,提出了基于扩张状态观测器(ESO)的多机电力系统汽门和励磁的非线性分散协调控制策略。同时给出了基于EFL的分散协调控制策略。数字仿真表明,当标称参数与电网实际一致时,基于ESO的非线性控制器能达到EFL控制器的非线性控制效果,但基于ESO的非线性控制器设计无需电网的有关参数,在标称参数与实际电网参数有误差时,基于ESO的非线性控制器较EFL具有更佳的鲁棒性和适应性。An extended state observer (ESO) based decentralized nonlinear coordinated control for a turbine governor and excitation system in multimachine power systems was developed to replace less robust and very complex exact feedback linearization (EFL) based controllers. The ESO-based controller performance was compared with that of an exact feedback linearization-based nonlinear controller. The simulation results demonstrate that if the plant model is well defined, the control performance of the ESO-based controller is similar to the EFL-based controller. However, if the plant model is uncertain the robustness and the adaptability of the ESO controller is better than that of the EFL controller.

关 键 词：扩张状态观测器 电力系统分析 分散控制 非线性不确定系统 协调控制 

分 类 号：TM711[电气工程—电力系统及自动化]