Time sequence data missing complementing method and system based on drainage basin cascade scheduling system

The invention discloses a time sequence data missing complementing method and system based on a drainage basin cascade scheduling system, and relates to a data processing technology, and the method comprises the steps: sequentially obtaining the water volume monitoring data of each sub-drainage basin of a cascade drainage basin; obtaining drainage basin video monitoring data in front of each sub-drainage basin dam; detecting abnormal data in the water volume monitoring data, and determining an abnormal time interval of the abnormal data; intercepting image data of the determined abnormal time interval from the corresponding drainage basin video monitoring data; generating a plurality of local images associated with the detection point area by utilizing a pre-trained water area local graph generation model based on the intercepted image data; determining water volume simulation data of the detection point area according to the plurality of local images; and complementing the abnormal data in the abnormal time