Abstract:The era of large power data, the informationization of electric power has reached a high level. Data from condition monitoring system, power production management system, operation dispatching system, and environmental meteorology system are gradually integrated and shared. Big data technologies provide new technical methods and tools for power equipment condition assessment and Intelligent operation and maintenance. It is of great significance to collect as much electricity as possible and how to make full use of the power operation data. The basic principle, the connotation of the large data analysis of the power operation and some typical typical application cases of the 3D intelligent transport inspection platform, which have been put into practical application, are introduced in detail, in consideration of the status quo of big data technology and data mining analysis in power equipment condition assessment. The methods and effects of big data techniques in application scenarios such as condition evaluation, anomaly detection, fault prediction and intelligent diagnosis are discussed. It also looks forward to several difficult problems and opportunities to be faced in the application of big data for power operation.