Energy storage power plant amd method for operating such a power plant

An energy storage power plant for generating electrical power which is suitable for converting electrical energy into thermal energy, wherein the thermal energy can be stored temporarily in at least two thermal storage tanks until it is needed and be retrieved when needed in order to increase the energy content of water in a water circuit, comprising:

• at least two thermal storage tanks, each with at least one converting device which enables electrical energy to be converted directly or indirectly into thermal energy,
• wherein the at least two thermal storage tanks can be thermally charged by temporarily storing the thermal energy, and
• wherein a thermal storage tank is for storing sensible heat and a thermal storage tank is for storing latent heat, and
• wherein one of the two thermal storage tanks has a modular structure and is thermally connected to a heat exchanger, via which heat exchanger heat can be transmitted indirectly from the modules of the thermal storage tank to the water in the water circuit,
• wherein each of the individual modules is provided with at least one converting device for converting electrical energy into thermal energy, and wherein the individual modules can be charged when needed with thermal energy independently of each other, and
• at least one power generation unit which can be operated with water in a water circuit, the energy content of which was increased by the temporarily stored thermal energy, in order to generate electrical power during operation.