Patent ID: 8955321
Filing Date: 2015-02-17
Classification: F01K

Abstract:
1. A method for primary control of a steam turbine installation in network operation, the steam turbine installation including at least a high-pressure and a low-pressure steam turbine stage, the method comprising: operating a live steam valve, along an operating-steam feed line to at least one pressure stage of the steam turbine, in a throttled manner for storing reserve power; introducing at least some partially expanded operating steam which issues from the high-pressure steam turbine stage into the low-pressure steam turbine stage via a direct steam feed line between the high-pressure steam turbine stage and the low-pressure steam turbine stage for further expansion, in the event of reduced network frequency and the live steam valve being transferred to a less throttled state, for network frequency boosting, wherein the at least some partially expanded operating steam which issues from the high-pressure steam turbine that is introduced into the low-pressure steam turbine via the direct steam feed line is not reheated.