Power plant for generating electrical power, having - a reformer unit, in which an energy carrier can be converted, with the supply of heat, into a combustion fluid, - a reformer burning device, in which, to provide a heat supply for the reformer unit, an energy carrier can be burned, - a power generator, which comprises a diesel generator or a turbine generator unit and is configured to burn a combustion fluid and generate electrical power with it, - wherein the power generator comprises power output lines for the purpose of outputting generated electrical energy to an external power network, characterised in that - an electrolysis apparatus is provided, which has a power receiving connection for receiving electrical energy from an external power network, - the electrolysis apparatus is configured, for the purpose of chemical energy storage, to obtain from one or a plurality of starting materials, in particular from water, one or a plurality of products, in particular H 2 and O 2, using the electrical energy taken up, - a connection line extends from the electrolysis apparatus to the power generator and the power generator is configured to burn one of the products of the electrolysis apparatus, and / or - a burning device line is provided, with which a product produced through electrolysis can be conveyed from the electrolysis apparatus to the reformer burning device and burned by the reformer burning device, wherein energy can be released from the product and used to generate electrical power, - with the power output lines electrical power generated via the combustion fluid and via the products produced through electrolysis can be supplied to an external power network. - a reformer unit, in which an energy carrier can be converted, with the supply of heat, into a combustion fluid, - a reformer burning device, in which, to provide a heat supply for the reformer unit, an energy carrier can be burned, - a power generator, which comprises a diesel generator or a turbine generator unit and is configured to burn a combustion fluid and generate electrical power with it, - wherein the power generator comprises power output lines for the purpose of outputting generated electrical energy to an external power network, - an electrolysis apparatus is provided, which has a power receiving connection for receiving electrical energy from an external power network, - the electrolysis apparatus is configured, for the purpose of chemical energy storage, to obtain from one or a plurality of starting materials, in particular from water, one or a plurality of products, in particular H 2 and O 2, using the electrical energy taken up, - a connection line extends from the electrolysis apparatus to the power generator and the power generator is configured to burn one of the products of the electrolysis apparatus, and / or - a burning device line is provided, with which a product produced through electrolysis can be conveyed from the electrolysis apparatus to the reformer burning device and burned by the reformer burning device, wherein energy can be released from the product and used to generate electrical power, - with the power output lines electrical power generated via the combustion fluid and via the products produced through electrolysis can be supplied to an external power network.