本文指出：逆系统方法和微分几何方法本质上是等价的，而逆系统方法的物理意义直观，不局限于仿射型系统，使用时仅需求导运算和代数运户，求解控制律过程比较简捷，便于工程应用。作者以电力系统的非线性励磁控制为例，证明了两种方法所得控制律是相同的。本文的结论可简化励磁控制、汽门控制、换流站控制、无功补偿器控制等问题的求解过程。 This paper points out that both the inverse system method and the differential geometry method are equivalent in nature, whereas the inverse system method has an intuitive physical meaning and is not limited to an affine system. It only needs guide and algebraic operators when used, and compares the control law process Simple and convenient for engineering applications. Taking the nonlinear excitation control of power system as an example, the author proves that the control laws obtained by the two methods are the same. The conclusion of this paper can simplify the solving process of excitation control, valve control, converter station control and reactive power compensator control.