基于热经济学结构理论的汽轮机组回热系统故障定位研究

Fault Location on Regenerative System of Turboset Based on Structural Theory of Thermo-economics

以某600MW超临界燃煤机组回热系统为研究对象,引入热经济学结构理论诊断模型,通过热力学稳态仿真模型对某组元发生故障后的故障指标值进行计算.基于诊断模型,采用"记忆"方法,把内在故障的定位与诱导故障的分离结合起来,完成了故障源的定位.结果表明:该故障诊断模型具有简捷、准确的特点,通过不同边界条件下的热经济学计算就能完全确定故障组元的位置,可以作为热力系统故障诊断的有效工具.

Taking the regenerative system of a 600 MW supercritical coal-fired unit as an object of study and introducing the diagnosis model based on structural theory of thermo-economics, the fault indices of a failed component were calculated through thermodynamic simulation model. Based on the diagnosis model and adopting the ＂Memory＂ method, the fault source was located by separating the induced fault from the inherent fault. Results show that with features of simplicity, accuracy, and capability of locating the fault component merely by thermo-economic calculations under different boundary conditions, the model can be used as an effective tool for fault diagnosis of thermal systems.