基于不精确模型的同步电机非线性励磁控制

NONLINEAR EXCITATION CONTROL OF POWER SYSTEM BASING ON INACCURATE MODEL

基于输电系统中同步电机的不精确励磁非线性模型,采用非线性控制理论中的全局线性化方法和滑动模态控制方法,导出一个非线性切换控制律,并用它设计出电力系统新型的非线性励磁控制器。针对单机无穷大系统进行数字仿真实验,结果表明,该励磁控制器能良好地改善系统的动态响应特性,且具有良好的鲁棒性。

Based on the inaccurate power system model, a nonlinear control strategy by using of the nonlinear transformation technique, the variable structure control theory and the robust control theory is proposed in this paper. This strategy results in a nonlinear variable structure stabilizer. Example of use this kind of PSS to a single machine infinite bus system is used to illustrate the effectiveness of the proposed controller. The simulation results show that the control proposed in this paper can significantly improve the power system stabilities and also has good robustness.