The states of the system and their differential signals are obtained on time by tracking differentiator,and the influence induced by nonlinear periodic load disturbance is compensated adaptively.

• 电力系统混沌振荡状态和它的微分信号由微分跟随器实时提取,并通过微分跟随器对非线性周期性负荷扰动的影响进行自适应补偿。