Intelligent substation secondary system data cleaning method

The invention relates to the technical field of transformer substation intelligent operation and maintenance, in particular to an intelligent transformer substation secondary system data cleaning method which comprises the steps that 1, an acquisition unit is stored in a secondary system of any intelligent transformer substation, and the acquisition unit acquires operation data in the transformer substation in real time and generates an acquisition data packet; step 2, establishing an operation data change model in the analysis and judgment unit, and determining abnormal acquisition data; step 3, determining the rationality of any abnormal acquisition data; step 4, determining to-be-invalid data in the unreasonable abnormal collection data; step 5, performing invalid data primary judgment on any one of the to-be-invalid data, and determining data and dangerous data which need to be subjected to secondary invalid judgment; and step 6, performing data range scoring on the data in the secondary invalidation judg