Method for short-term power adaptation of a steam turbine of a gas and steam power plant for primary control

摘要

The invention relates to a method for short-term power adaptation of a steam turbine of a gas and steam power plant for the primary control, comprising the steps of opening or closing a pent-up turbine valve (31, 51) at least one pressure stage (1, 2, 3, 4) of the steam turbine in dependence from a demanded change in performance; Comparing a predetermined pressure setpoint (41) with a pressure measurement (32) measuring upstream of the accumulated turbine valve (31) the pressure of the steam mass flow entering the at least one pressure stage (1, 2, 3, 4); Opening or closing a supply (71, 81), for introducing a variable water content in the steam mass flow of at least one of the pressure stages (1, 2, 3, 4) as soon as the pressure setpoint (41) is exceeded or exceeded, wherein the variable water content as long as in the steam mass flow is introduced until an adjusted steam temperature set point (49) is reached, which is the difference between a predetermined basic steam temperature setpoint (45) and the output value of an at least proportional regulator (48) which determines the difference between pressure measurement (32) and pressure setpoint (41 ) evaluates and compensates, determined.