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燃气轮机气动部件故障的发生会导致机组性能参数的变化,且为复杂的非线性变化。在建立燃气轮机标准模型的基础上,研究了系统的故障性能参数的变化及建立了系统的故障模型。首先通过标准模型仿真数据和机组故障运行数据的对比分析,初步定位机组的故障部件,进而提出了修正部件特征性能参数的方法,通过模块实现机组故障的非线性表达,在EASY5仿真平台上建立了燃气轮机系统的故障模型。利用该模型可通过机组非线性模型定量表达部件性能参数的变化,准确地实现机组的故障定位和仿真。以某联合循环机组的燃气轮机为例对此方法进行了验证,实现了机组故障工况的重现,为机组性能特性研究、故障诊断和故障分析奠定了一定的基础。
Gas turbine pneumatic components failure will lead to changes in the performance parameters of the unit, and complex non-linear changes. Based on the establishment of gas turbine standard model, the change of system performance parameters and the establishment of the system fault model are studied. First of all, by comparing the simulation data of the standard model and the fault operation data of the unit, the fault components of the unit are preliminarily located, and then the method of correcting the characteristic parameters of the components is proposed. By means of the module, the nonlinear expression of the fault of the unit is established. Based on the EASY5 simulation platform, Fault Model of Gas Turbine System. The model can be used to quantitatively express the change of component performance parameters through the nonlinear model of the unit, and accurately locate the fault location and simulation of the unit. Taking a gas turbine of a combined cycle unit as an example, this method is verified and the fault condition of the unit is reproduced, which lays a foundation for the research on the performance characteristics, fault diagnosis and fault analysis of the unit.