A novel failure analysis and diagnosis method for hydraulic-turbine generator unit

作者：Xia, Xin^*; Ni, Wei

来源：Journal of Vibroengineering, 2016, 18(6): 3568-3580.

DOI：10.21595/jve.2016.16794

• hydraulic-turbine generator unit
• fault diagnosis
• finite element
• nonlinear output frequency response functions

The failure analysis and diagnosis of hydraulic-turbine generator unit (HGU) is important to protect the safety and stability of the electric system. But failure analysis and diagnosis for HGU is lacking of fault data, and most of the failure analysis and diagnosis methods are proposed without considering the characteristic of HGU. In this paper, a vibration dynamic modeling method for HGU is proposed by using the finite element method, and further the vibration data in different states are getting through numerical simulation. Then, the failure feature is extracted based on the nonlinear output frequency response functions (NOFRFs). Finally, a diagnosis system with Support Vector Machine (SVM) is proposed and employed for diagnosis of the HGU. The experimental results indicate that the feature which extracted from NOFRFs has a strong effect, and demonstrates that the proposed method is feasible and helpful for fault diagnosis in HGU.

• 出版日期2016-9
• 单位淮阴工学院