Patent ID: 6647727
Filing Date: 2003-11-18
Classification: F01K,G05D

Abstract:
A method for controlling a steam turbine installation having a reheater with an outlet, the reheater arranged between a high-pressure turbine and a medium-pressure turbine or a low-pressure turbine, and a low-pressure bypass with a low-pressure bypass valve, which low-pressure bypass leads from the reheater outlet into a condenser, the method comprising:controlling the low-pressure bypass valve based upon characteristic curves for the required value of the reheater pressure, the controlling being performed during an event selected from the group consisting of run-up, load rejection procedures, and idling; wherein the characteristic curves depend on a parameter selected from the group consisting of the load (L) applied to the installation, the pressure (P) before the high-pressure turbine blading, the reheater steam flow (M), the high-pressure turbine exhaust steam temperature (THD) the temperature (TFD) of the live steam introduced into the high-pressure turbine, the pressure (pFD) of the live steam introduced into the high-pressure turbine, the reheater pressure (P2), and combinations thereof.