Technical and Economical Feasibility of Putting the Steam Turbine of PGU-450 into Motoring Mode

Abstract

Technical and economical feasibility of using the motoring mode of the steam turbine of PGU-450 CCPP to reserve its capacity as an alternative to turbine shutdown is analyzed. It is shown that putting the steam turbine to motoring mode and shutting down the gas turbines and heat-recovery steam generators to reserve the capacity of PGU-450 for 7 – 8 h is more economic than shutting down the steam turbine. In this case, the duration of the start-ups of PGU-450 is 35 – 40 min rather than 80 – 90 min.