基于拓展傅里叶水电机组轴系参数敏感性研究  

Study on sensitivity of hydro-generator set shafting parameters based on extended Fourier

作　　者：刘姮 LIU Heng(State Grid Baiyin Power Supply Company,Baiyin 730900,China)

机构地区：[1]国网白银供电公司,甘肃白银730900

出　　处：《水电站机电技术》2024年第4期1-7,10,127,共9页Mechanical & Electrical Technique of Hydropower Station

摘　　要：为了分析预测水轮发电机组轴系系统状态变量的变化规律,采用模块化建模方法,建立了考虑外部激励作用的水轮发电机组轴系系统非线性动力学模型;通过选取机组轴系系统参数取值范围及分布规律,采用具有全局敏感性分析优势的拓展傅里叶敏感性分析方法,对机组轴系系统参数开展敏感性分析,探究了各个轴系系统单参数及参数间耦合作用对转子和转颈位移输出响应影响的敏感程度。研究结果对保障机组轴系系统稳定工作、改善系统运行性能具有一定的指导作用。In order to analyze and predict the change law of the state variables of shafting system of hydro-generator set,the modular modeling method is adopted to establish a nonlinear dynamics model considering external excitation.The value range and distribution law of unit shafting system parameters are selected and the extended Fourier sensitivity analysis method with the advantage of global sensitivity analysis is adopted for sensitivity analysis of unit shafting system parameters,as well as study of sensitivity degree of the impact of individual shafting system parameters and coupling effect between parameters on displacement output response of rotor and rotating neck.The research results have a certain guiding role in ensuring the stable operation of unit shafting system and improving the operating performance.

关 键 词：水轮发电机组 轴系系统 敏感性分析 非线性动力学 稳定性法 

分 类 号：TK730.1[交通运输工程—轮机工程]