Cai Shengwei

Research on intelligent technology of transformer

Through the study on countermeasures against abnormal conditions of the transformer and some key technologies including the insulation state and service life evaluation of the transformer, the paper develops the intelligent module for transformer on the basis of integrating the sensor technology, state and life evaluation technology and communication technology as a whole and makes the prototype, initially realizing the intelligent operation of the transformer. The online monitoring device is the basis of the intelligent transformer. The online monitoring device for the intelligent module developed in this paper includes online monitoring device for oil chromatogram, distributed temperature sensing, leak current of insulating casing, dielectric loss, online monitoring device for capacitance, online monitoring device for partial discharge and online monitoring device for core grounding current. On the basis of the online monitoring data provided by the online monitoring device, the intelligent module is used for the judgment of operation state of transformer, analysis of abnormal operating conditions, evaluation on the remaining service life and comprehensive management through some artificial intelligence methods such as interactive expert system, decision tree diagnosis and Bayesian network diagnosis.