Automatic control method and device for hydropower station

The invention discloses an automatic control method and device for a hydropower station, and belongs to the technical field of hydropower station control. Water flow is layered, when the water flow in a natural river flows into the power generation drainage water tank from the power generation water tank control dam, the water flow above and garbage floating above the water flow downwards flow into the decontamination filter tank from the interior of the upper water guide tank, and the garbage floating above the natural river enters along the water flow; in this way, water flows out of the filtering through holes, garbage in the water is left in the decontamination filtering tank, the garbage in the decontamination filtering tank is transported forwards through rotation of the decontamination rotating shaft by means of the decontamination spiral, the garbage is prevented from being accumulated in the decontamination filtering tank to cause blockage, and therefore automatic cleaning of the water flow garbage o