Low-pressure steam turbine plant and operating method for a low-pressure steam turbine plant

摘要

The invention relates to a low-pressure steam turbine system (10) comprising a flash evaporator (12) for evaporating liquid heat transfer medium (14), the pressure in the flash evaporator (12) being below the ambient pressure, - a steam turbine (18), - a generator ( 20), which is coupled to the steam turbine (18), - power electronics (22) for connecting the generator (20) to a consumer and / or a power network, - a capacitor (26) for condensing the steam turbine during operation (18) escaping vaporous fluid, the pressure in the condenser (26) being below the ambient pressure, - a vacuum breaker (38), which is arranged downstream of a turbine wheel (50) of the steam turbine (18), and - a control unit (24) which is set up to change the electrical load on the generator (20) by the power electronics (22) and to open the vacuum breaker (38). The invention further relates to an operating method for r a low-pressure steam turbine system (10), with the steps a) evacuating a line system of the low-pressure steam turbine system (10), so that the pressure in the line system is everywhere below the ambient pressure and so that the heat transfer medium (14) evaporates in a flash evaporator (12), b) changing the electrical Load on a generator (20), c) opening a vacuum breaker (38).