介绍了一种基于热力学的故障诊断方法——由内部参数θ和耗散温度Td的变化来对汽轮机数据进行计算并诊断是否出现故障。对江苏某电厂600 MW汽轮机组利用该方法进行了设计负荷和性能考核试验,通过计算不同工况下的θ内部参数,对机组进行性能分析与故障诊断,验证了该方法的正确及实用性。 A fault diagnosis method based on thermodynamics is introduced. The steam turbine data are calculated by the change of the internal parameter θ and the dissipation temperature Td and the fault is diagnosed. This method was used to test the design load and performance of the 600 MW steam turbine unit in a power plant in Jiangsu Province. By analyzing the θ internal parameters under different operating conditions, the performance analysis and fault diagnosis of the unit were carried out, and the correctness and practicability of the method were verified.