Regional power grid security check data verification method, system and device and medium

The invention discloses a regional power grid security check data verification method, system and device, and a medium. The method comprises the steps of obtaining plan prediction data of each sub-region; matching verification is carried out through plan prediction data and corresponding similar day historical sections; performing data integrity verification on plan prediction data which can be matched with similar day historical sections in a consistent manner; superposing a maintenance plan on the basis of the similar day historical section to generate a power grid future topology, and performing state consistency verification on power generation and bus load through the power grid future topology; carrying out balance verification on each partition system of the power grid satisfying the data integrity verification and the state consistency verification, and calculating to obtain a system unbalance amount; and carrying out load adjustment on each partition of the power grid based on the system unbalance am