在介绍了过程系统工程理论的基础上 ,采用过程系统工程理论的序贯模块法建立了电站汽轮机热力系统的过程单元模拟和系统模型 ,并采用回路断裂与收敛策略对热力系统进行了性能拟 ,验证了模型精度 ,最后分析了过程系统工程理论在电站过程系统性能模拟、分析、优化和诊断中应用的可行性与重要性 Based on the introduction of the theory of process system engineering, the process unit simulation and system model of steam turbine thermal system of power station are established by using the sequential module method of process system engineering theory. The performance of the thermal system is simulated by loop breaking and convergence strategy. The accuracy of the model was verified. Finally, the feasibility and importance of the application of process system engineering theory in the simulation, analysis, optimization and diagnosis of power plant process system performance were analyzed