The reservoir scheduling optimization technology is often subject to the water condition uncertainty and the low accuracy of long-term weather forecast Based on the difference of scheduling objectives and strategies during rainfall prediction

occurrence and ending stages

this paper proposes the three-stage scheduling optimization mode for before the rain

in the rain

and after the rain periods

which realizes the convergence of short and medium-term forecast and long-term optimal scheduling for hydropower station. It will avoid the situation that rising water level too high before the rain causing water abandonment

and also avoide the situation that water level descending too fast in the intermittent period after the rain causing long-term low waterlevel operation. So as to improve the efficiency of water resources utilization.