Power grid historical data management method and system based on unified support platform

The invention discloses a power grid historical data management method and system based on a unified support platform. The method comprises the following steps: modifying sampling point records by utilizing a sampling information definition management tool, and synchronizing the modified sampling point records to each historical database table of a historical database in real time; storing the real-time data sections stored in a real-time library equipment table into a historical database in batches according to the modified sampling point records; when a historical database fault occurs, automatically storing a real-time data section in the historical database into a specified hard disk, automatically establishing a new historical database connection after the historical database fault isrecovered, and writing the real-time data section stored in a hard disk into the historical database at one time; the method further comprises a step of performing historical data interaction based on a historical data sampl