| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a combined cycle plant capable of increasing a flow of steam generated by an exhaust heat recovery boiler without degrading efficiency of the exhaust heat recovery boiler and suppressing a plant power reduction rate even if efficiency of a gas turbine degrades with aging degradation of the gas turbine and a quantity of exhaust heat increases.SOLUTION: In a combined cycle plant including: a gas turbine; an exhaust heat recovery boiler generating steam using exhaust heat from the gas turbine; and a steam turbine supplying the steam generated by the exhaust heat recovery boiler from the exhaust heat recovery boiler via a steam system, the steam line is arranged to be branched off into a first steam system for introducing the steam to an initial-stage inlet of the steam turbine, and a second steam system for introducing the steam to an inlet of a stage downstream of the initial stage of the steam turbine, and a flow of the steam supplied to the steam turbine via the first and second steam systems is regulated on the basis of a flow of the steam generated by the exhaust heat recovery boiler.</p> |
