Combination cycle power generation system for use in power station environment, has pressure controlling devices adjusted to preset value for point and adjusted such that preset value is increased with preset rate to another preset value

摘要

The system (10) has a gas turbine (12) and a steam turbine (14) coupled with generators (16, 18), respectively. A heat recovery steam generator (HRSG) (20) is coupled with the turbines, where the HRSG serves for supplying steam to the steam turbine. Pressure controlling devices (40, 42) are coupled in flow connection with the HRSG, where the pressure controlling devices are adjusted to a preset value for a bypass pressure setting point and are adjusted such that the preset value is increased with a preset rate to another preset value.