针对单机无穷大系统，给出了一种电力系统自校正稳定器。它采用基于δ算子的离散模型，在辨识环节中引入活动界限和相对死区，控制器采用滑动极点配置方案。仿真结果显示，在大小干扰的情况下，相对于参数固定的电力系统稳定器，文中所提出的自校正电力系统稳定器抑制低频振荡的能力更强。 For a single machine infinite system, a power system self-correcting stabilizer is given. It uses a discrete operator model based on δ operator to introduce the active boundary and relative dead zone in the identification process. The controller adopts the sliding pole configuration scheme. The simulation results show that the self-tuning power system stabilizer presented in this paper is more capable of suppressing the low-frequency oscillation than the fixed-system power system stabilizer under the condition of large or small disturbance.