摘要
电力系统参数摄动和外界干扰等因素对励磁系统影响很大,该文选择易于测量的状态变量建立鲁棒励磁控制系统模型,结合逆推设计方法和自适应滑模控制理论设计励磁控制器。按照逆推设计方法,逐步构造了李亚普诺夫函数,在构造虚拟控制信号时引入误差的积分项;给出阻尼系数的自适应律;设计了新的滑模面,从而得到最终的控制规律,对干扰进行抑制。仿真实验结果表明,系统在动静态响应性能上均优于常规逆推控制,说明这种控制方法能够改善系统的电压和功角稳定性。
Disturbance and parameter uncertainty of power system have great influence on excitation system performance. The measurable state variable was selected to construct the new robust model. Integrated backstepping method and sliding mode control theory was applied to propose a new adaptive backstepping sliding mode excitation control algorithm. According to the backstepping approach, series Lyapunov functions were constructed step by step and the virtual error integral signal was introduced into Lyapunov function. The adaptive law of damping coefficient was given. A new sliding surface was designed. The whole control law was obtained by applying the sliding mode control theory and the disturbance was attenuated. Simulation results show that proposed control method can improve the voltage and power angle stability greatly cmpared to the conventional cotrol methods.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2009年第10期74-77,共4页
Proceedings of the CSEE
关键词
逆推方法
自适应滑模
误差积分
励磁控制器
不确定参数
李亚普诺夫函数
backstepping approach
adaptive sliding mode error integral
excitation controller
uncertainty parameter
Lyapunov function
