| abstract |
The present invention provides a semi-artesian drainage system and a control method for a pumped-storage power station. By arranging a water collecting well at the outlet of an artesian drainage hole and arranging a plurality of submersible pumps in the water collecting well, and also setting an accident gate, it can effectively Reduce the water level requirements for the outlet channel of the drainage tunnel in semi-artesian drainage, so that the originally required check flood level needs to be lower than the bottom elevation of the lowest floor of the powerhouse, and the normal water level can be reduced to be lower than the bottom elevation of the lowest floor of the powerhouse. The invention can greatly shorten the excavation length of the artesian drainage hole, and even can make many plans that can only use water pump for maintenance and leakage drainage to be modified into a semi-artesian drainage plan, and the full artesian drainage plan can be modified into a semi-artesian drainage plan The length of the artesian drainage tunnel is greatly shortened, which can greatly reduce the investment of the power station. |