Aiming at the problems of low efficiency, low level of intelligent operation and low level of data informatization application encountered in the current substation equipment test operation, a mobile laboratory platform based on grid cloud data management was developed. This paper focused on the theoretical process of the result judgment of the expert analysis system embedded in the mobile laboratory platform. Combined with the practical application cases of transformer differential protection after operation, according to the test results of low-voltage short-circuit impedance method, capacitance method, frequency response characteristic method, transformation ratio and direct resistance test, the reliability of the embedded expert analysis system to analyze the winding deformation caused by the short circuit impact of the transformer was illustrated. Finally, according to the results of the dismantling inspection after returning to the factory, the validity of the platform in the field application was further verified.
