对一种适用于一般结构多输入多输出非线性系统的鲁棒输出反馈控制理论进行改进,扩展了其应用范围.针对单机无穷大系统,以发电机的角速度、机端电压及有功功率作为输出反馈信号,建立系统的可观测映射,推导出可观测域,并基于改进理论设计出非线性鲁棒输出反馈励磁控制器.该控制器无需测量发电机的转子角与暂态电势,实施方式简单.仿真结果表明该控制器对扰动有很好的抑制效果.%The robust output feedback control theory suitable for general multi-input multi-output nonlinear systems is improved to extend its application. An observable mapping is defined for the single machine infinite bus power system,which takes the rotor speed,terminal voltage and active power output of the generator as the output feedback signals. The corresponding observable domain is derived and a nonlinear robust output feedback excitation controller is designed based on the improved theoiy. Without the measuring of generator rotor angle and transient voltage,it is easy to implement. Simulative results show its better performance in disturbance suppression.
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