| 摘要 |
The present invention relates to a method to temporarily increase the power of a gas turbine (11), a part of combined-cycle power plant (10). Exhaust gas of the gas turbine (11) is used in a heat recovery vapor generator (13) to generate vapor for a water/vapor cycle having a vapor turbine (12), comprising: a high pressure vapor turbine (20); a medium pressure turbine (21); and a low pressure turbine (22). The method comprises a step for injecting vapor from the water/vapor cycle to the gas turbine (11) at a preset injection pressure. Vapor with a lower pressure than the preset injection pressure is obtained from the water/vapor cycle and pressure obtained from the water/vapor cycle goes through a compression step by an individual compressing means (14) to reach the preset injection pressure. And the compression vapor is injected into the gas turbine (11), thus improving efficiency. Preferably, the individual compressing means (14) comprises at least one vapor operating ejector. |
