基于非线性模型的燃气轮机热参数故障诊断及仿真  

Thermal Parameter Fault Diagnosis and Simulation of a Gas Turbine Based on a Non-linear Model

作　　者：于美玲[1] 刘永文[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《热能动力工程》2011年第6期651-654,769,共4页Journal of Engineering for Thermal Energy and Power

基　　金：上海市科委基金资助项目(08DZ1204202)

摘　　要：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。Occurrence of various faults to the aerodynamic components of a gas turbine may invariably lead to a change of its performance parameters and such a change is a complex and non-linear one.On the basis of the establishment of a standard model for gas turbines and through a contrast analysis of the simulation data obtained by using the model in question and the operating data of the unit when a fault is happening,the faulty component could be preliminarily located and a method for correcting the characteristic and performance paramerters of the component could be further presented.Through various modules,a non-linear expression of the fault of the unit was realized.On the EZSY5 simualtion platform,a model for faults of a gas turbine system was established.The amount of a change in a perforamnce parameter of the component can be quantitatively expressed by using the model under discussion through a non-linear model for gas turbine units,thus accurately realizing a location and simulation of the fault.With a gas turbine in a combined cycle unit serving as an example,the method under discussion was verified,realizing the reappearance of the operation conditions of the fault and laying a definite foundation for study of the performance characteristics,fault diagnosis and analysis of a unit.

关 键 词：燃气轮机 标准模型 故障修正因子 故障模型 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]