METHOD OF CONTROLLING A COMBINED - CYCLE PLANT FOR PRODUCTION OF ELECTRIC ENERGY AND COMBINED -CYCLE PLANT FOR PRODUCTION OF ELECTRIC ENERGY

摘要

A method of controlling a combined-cycle plant for production of electric energy, comprising at least one gas turbine assembly (2) and a steam turbine (5) with respective generators (3) and (6). A provisional load set- point (SP_TV*) for the steam turbine (5) is determined on the basis of the plant load set-point (SP₀) and an actual steam pressure (P_A) supplied to the steam. turbine (5). A gas turbine load set-point (SP_TG) is thus determined on the basis 'of the plant load set-point (SP₀) and the provisional load set-point (SP_TV*) and is used to control the gas turbine assembly (2). A steam turbine load set- point (SP_TV), indicative of a second power (W_TV) to be supplied through the steam turbine (5), is finally determined on the basis of the provisional load set- point (SP_TV*) and of a load error (E_TG) of the gas turbine assembly (2) and is used to control the steam turbine (5).