本文引入70年代初发展起来的系统动力学方法——功率键合图法来建立汽轮机液压调节系统的数字仿真模型。功率键图法具有物理意义明瞭,建模过程简便、规范的特点,所建立起来的状态空间模型可以包容各种复杂非线性因素。是进行调节系统精确定量仿真的一种值得推广的建模方法。 This paper introduces the system dynamics method developed in the early 1970s - the power bond graph method to establish the digital simulation model of steam turbine hydraulic regulation system. The power key graph method has the meaning of physical meaning, the modeling process is simple, the characteristic of the specification, the state space model established can accommodate a variety of complex nonlinear factors. It is a worthwhile promotion modeling method to carry on accurate quantitative simulation of regulation system.