NOVELTY - The power station arrangement comprises an energy generation unit (10) for generating useful thermal energy on the basis of physical and/or chemical processes, a high-temperature metal oxide/air storage unit (20) to be partially supplied with heat for regular operation, and a piping system (30) for thermally coupling the energy generation unit to the high temperature storage unit. The piping system comprises a first portion, which is designed to supply thermally conditioned air to the high-temperature storage unit. The energy generation unit is acted as a gas turbine (50).    USE - Used as a power station arrangement.    ADVANTAGE - The power station arrangement has improved heat removal efficiency, and can be operated in an energy efficient and economical manner.    DETAILED DESCRIPTION - The power station arrangement comprises an energy generation unit (10) for generating useful thermal energy on the basis of physical and/or chemical processes, a high-temperature metal oxide/air storage unit (20) to be partially supplied with heat for regular operation, and a piping system (30) for thermally coupling the energy generation unit to the high temperature storage unit. The piping system comprises a first portion, which is designed to supply thermally conditioned air to the high-temperature storage unit. The energy generation unit is acted as a gas turbine (50), a solid combustion chamber, entrained flow gasifier, a fluidized bed gasifier and/or a high-temperature nuclear reactor. The piping system further comprises a first heat exchanger (40). The first heat exchanger is adapted to transfer heat generated in the energy generation unit to a stream of air supplied to the high-temperature storage unit and adapted to supply an exhaust gas stream and/or a coupled exhaust gas stream from an expansion stage of a gas turbine and/or a combustion chamber of the gas turbine via the conduction system for transferring heat, and is provided with an electric heater. The conduction system comprises a second heat exchanger, which is adapted to transfer leaked heat from the high-temperature storage unit to the air stream, and a third heat exchanger. The second heat exchanger is thermally coupled to the first heat exchanger. The third heat exchanger is adapted to transfer heat to from the energy generation unit to a vapor flow in a vapor line, which is supplied through the conduction system to the high-temperature storage unit. The vapor line is a high pressure steam line in which regular operation prevails at a pressure of 90 bars. The steam line is thermally and/or fluidly coupled with a heat recovery steam of a steam-turbine-system. The piping system further comprises a second portion, which is adapted to supply thermally conditioned water and/or steam to the high-temperature storage unit. The second portion is a low pressure steam line that prevails a maximum pressure of 10 bars during regular operation, and is thermally and/or fluidly coupled with the heat recovery steam generator of the steam turbine system. An INDEPENDENT CLAIM is included for a method for operating a power station arrangement.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a power station arrangement.    Energy generation unit (10)    High-temperature storage unit (20)    Piping System (30)    First heat exchanger (40)    Gas turbine. (50)