水轮发电机组故障诊断系统中几种征兆的获取

Acquisition of systems in fault diagnosis of hydropower generating units

在水轮发电机组故障诊断系统中 ,征兆获取能力是评价故障诊断系统性能的重要指标 ,故障信号的特征提取影响到整个诊断过程的计算以及整个诊断系统的品质 .将FFT、分形几何、相关分析、奇异谱等理论应用于故障诊断系统中征兆的获取 ,针对不同类型征兆采取不同的数学处理方法 ,并结合水轮发电机组故障诊断系统 ,证明了所述方法的合理性和可行性 。

This paper discussed the application of FFT, sub dimension, correlation analysis, singularity spectrum to the acquisition of symptoms in fault diagnosis system. Different mathematic methods were applied to different types of symptoms. This proved to be reasonable and available in fault diagnosis of hydropower generating units so that the reliability and accuracy of the whole fault diagnosis system was improved.