Fault detection and fault diagnosis integrated system of power transformer

The invention discloses a fault detection and fault diagnosis integrated system of a power transformer. The fault detection and fault diagnosis integrated system comprises a sample extraction subsystem, a sample data processing subsystem, a fault detection subsystem and a fault diagnosis subsystem which are connected with one another sequentially; the sample extraction subsystem includes a transformer oil sample extraction module, a transformer oil sample gas extraction module and a gas chromatography analysis module; the data processing subsystem includes a sample data clustering module; the fault detection subsystem includes a model training module and a fault prediction module; and the fault diagnosis subsystem includes a decision-making rule module and a fault diagnosis module. With the fault detection and fault diagnosis integrated system of the power transformer of the invention adopted, whether the transformer will malfunction can be predicted; a fault type can be determined through diagnose when a fault occurs on the transformer; and reliable references can be provided for maintenance personnel in transformer maintenance.