Research on Fault Diagnosis for Traction Transformer on the Basis of Model-based Diagnosis and Expert System
Shibin Gao · Journal of the China Railway Society · 2013
The traditional test method and the expert system have some disadvantages in fault diagnosis.In view of this,a method of model-based diagnosis was applied to fault diagnosis of traction transformers.For potential faults of traction transformers,the model-based system and expert system were combined to make full use of their advantages and fulfill fault diagnosis.The process of implementation was also described.For circuit faults of traction transformers,the model-based method was used to build an Abstract model of two layers of structure and functional with voltages and currents as variables.Due to the invariable arrangements of the observation devices,the diagnosis process was classified into the parts of offline and online diagnosis.Finally,an actual traction transformer was simulated to obtain fault data and reasoning of fault diagnosis was accomplished with the model-based method.Feasibility and effectiveness of the model-based method for diagnosis of traction transformer faults were verified.