摘要
通过构造扩张状态观测器对多输入多输出受控对象内环进行动态输出反馈线性化,并对补偿线性化后的对象外环进行预期动力学设计的方法,提出了基于自抗扰技术的静止移相器和发电机励磁系统的协调控制策略。利用Lyapunov能量函数法和H∞理论。分析了控制器的稳定性。为了比较不同的控制效果,文中同时给出了基于直接反馈线性化(DFL)的协调控制策略。数字仿真表明:该控制器与精确反馈线性化控制方法相比较,其结构更简单,且对模型的内外扰具有更佳的适应性和鲁棒性。
The paper proposes a novel coordinated nonlinear auto-disturbance-rejection controller (ADRC) for the excitation system and the static phase shifter (SPS) in a singlemachine infinite-bus power system. In the paper, a new dynamic feedback linearization method based on a nonlinear extended state observer is introduced, and the anticipating dynamic characteristic design for the linearized system is also explicated. The stability of coordinated controller is analyzed by using the Lyapunov stability theory and the linear H∞ theory. In order to compare the control performance with the accurate feedback linearization method, a directional feedback linearization (DEL) method based nonlinear controller is also provided. The simulation results show that designed controller own a simpler structure and higher robustness than the DFL based one.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2003年第9期1-5,共5页
Proceedings of the CSEE
基金
国家自然科学基金项目(50277021)
国家电力公司科技项目(SP(2002)18124)~~
关键词
静止移相器
发电机
励磁系统
自抗扰协调控制
电力系统
静暂态稳定性
Power system
Excitation system
Static phase shifter
Auto-disturbance-rejection control
MIMO nonlinear system
Robust control
Extended state observer
