Automatic switching method and system for giant hydropower station units

The invention discloses a giant hydropower station unit automatic switching method and system, and relates to the technical field of hydropower stations. A unit switching function automatically checks an aF starting-up to no-load condition, a bF normal shutdown condition, an adding and cutting unit, a stopping and cutting unit and the total active power of the two units; and executing the unit automatic switching process. Through the automatic switching method for the giant hydropower station units, a large number of manual operation steps are converted into automatic process implementation, and the working efficiency of operators is improved. The operation of frequently switching pictures of the monitoring module by an operator is reduced, the misoperation risk is avoided, and the operation reliability of the equipment is improved. And the time of operators is effectively saved, the problem of tension of personnel allocation in the unit maintenance period is solved, and the safe and stable operation level of