Electric power system is a sophisticated nonlinear dynamic system. ln order to avoid problems like "explosion of number of terms" in the traditional back stepping design, or"chattering" in the multiple surface gliding mode design, and ensure the power systemˊs stable performance with a simplified control er, the dynamic surface design method is proposed for the control er design. Through further study of dynamic error equation of the power system, quadratic stability is deduced from Lyapunov function, and based on it, suitable dynamic surface gains and the constants of filter time are detected. The effectiveness of the above-said algo-rithm is verified by the simulation experiments.%电力系统是一个复杂的非线性动态系统，为了避免传统backstepping设计法的项数膨胀问题以及多面滑模设计法的抖振问题，保证电力系统在简化的控制律下仍具有良好的稳态性能。采用动态面方法设计电力系统控制器，通过进一步研究电力系统的动态误差方程，利用李亚普诺夫函数推导出电力系统二次方稳定性定理，并根据该稳定性定理寻找合适的动态面增益和滤波时间常数。仿真实验验证了该算法的有效性。
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