基于自适应逆推变结构方法的非线性励磁控制  

Nonlinear excitation control based on adaptive backstepping and variable structure method

作　　者：杨培宏[1] 刘文颖[2] 魏毅立[1] 张继红[1] 

机构地区：[1]内蒙古科技大学信息工程学院,内蒙古包头014010 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《电力系统保护与控制》2012年第20期125-129,144,共6页Power System Protection and Control

摘　　要：将自适应逆推方法与变结构方法相结合逐步构造Lyapunov函数,这样不仅可以提高动态系统的暂态响应和控制器增益综合性能指标,而且对不满足匹配条件或参数不确定性的非线性系统具有鲁棒镇定性。针对上述理论设计了一种非线性励磁控制器,该控制器能够保证闭环系统对不确定参数的自适应性。基于该方法设计的非线性励磁控制器在两区域四机系统上进行仿真计算,结果表明,该励磁控制器能够有效地抑制电力系统的干扰,提高互联电网的稳定性。By combining the adaptive backstepping method with the variable structure method, the Lyapunov function is constructed step by step, which not only improves dynamic system comprehensive performance index including transient response and controller gain, but also improves robust stabilization of nonlinear system with mismatched or uncertainty parameter. A nonlinear excitation controller is designed based on the method; it can guarantee the close-loop system adaptive to uncertain parameters. Numerical simulation is conducted on the two-area four-generator system based on the excitation controller, and results show that disturbance in power system is restrained effectively, and the stability of interconnected power system is improved.

关 键 词：非线性系统 自适应逆推方法 变结构控制 励磁控制 电力系统 

分 类 号：TM76[电气工程—电力系统及自动化]