Construction for extracting, storing and releasing electrical energy

摘要

The invention relates to a construction for large-scale and centralized extraction, storing and subsequent release at the desired moment of electrical energy in the order of magnitude of at least 1000 Mwh. The construction comprises a substantially water-retaining basin with water-retaining bottom and side wall, which basin closes off an inner water mass from an outer water mass subject to tides, such as the sea. The construction is further provided with pump means for pumping inner water to the outer water mass, and with electrical energy release means which convert a water flow resulting from a difference in level between the inner and outer water masses to electrical energy. The side wall of the construction comprises a peripherally closed dike body which is provided with a substantially water-retaining, peripherally closed screen extending to a position below the basin bottom, and with water removing means located within the periphery of the substantially water-retaining screen.