Abstract: A method is provided for primary control of a steam turbine installation in network operation, which provides at least two pressure stages, these being a high-pressure and a low-pressure steam turbine stage, in which for storing reserve power a live steam valve along an operating-steam feed line to at least one pressure stage of the steam turbine is operated in a throttled manner, the live steam valve, in the case of a reducing network frequency and network frequency boosting which is necessary as a result of this, is transferred to an at least less throttled state. At least some of the partially expanded operating steam which issues from the high-pressure steam turbine stage is introduced directly without reheating, into the low-pressure steam turbine stage for further expansion.

Abstract: A method is provided for primary control of a steam turbine installation in network operation, which provides at least two pressure stages, these being a high-pressure and a low-pressure steam turbine stage, in which for storing reserve power a live steam valve along an operating-steam feed line to at least one pressure stage of the steam turbine is operated in a throttled manner, the live steam valve, in the case of a reducing network frequency and network frequency boosting which is necessary as a result of this, is transferred to an at least less throttled state. At least some of the partially expanded operating steam which issues from the high-pressure steam turbine stage is introduced directly without reheating, into the low-pressure steam turbine stage for further expansion.

Abstract: A steam turbine (10) with heating steam extraction includes a plurality of turbine sections (11, 12, 15, 17, 19, 20) for the high pressure, medium pressure and low pressure ranges, which turbine sections (11, 12, 15, 17, 19, 20) are arranged in each case in a separate casing and connected by a common shaft (28), and which includes one high pressure turbine (11), at least one subsequent medium pressure turbine (15, 17), which is connected on the outlet side to two series-connected heaters (21, 24) of a district heating circuit (27), and one subsequent low pressure turbine (19, 20). Safe control of high volumetric flows of steam is achieved by providing, for heating steam extraction, two medium pressure turbines (15, 17), which operate in parallel, in separate casings, and which are connected on the outlet side in each case to one of the heaters (21, 24).

Abstract: A steam turbine (10) with heating steam extraction includes a plurality of turbine sections (11, 12, 15, 17, 19, 20) for the high pressure, medium pressure and low pressure ranges, which turbine sections (11, 12, 15, 17, 19, 20) are arranged in each case in a separate casing and connected by a common shaft (28), and which includes one high pressure turbine (11), at least one subsequent medium pressure turbine (15, 17), which is connected on the outlet side to two series-connected heaters (21, 24) of a district heating circuit (27), and one subsequent low pressure turbine (19, 20). Safe control of high volumetric flows of steam is achieved by providing, for heating steam extraction, two medium pressure turbines (15, 17), which operate in parallel, in separate casings, and which are connected on the outlet side in each case to one of the heaters (21, 24).