초록 ▼

Gas turbine starting method is improved to start operation with bleed valves being first throttled, then fully opened on the way and then fully closed at 90% speed, thereby fluid unstableness phenomenon is suppressed and starter motor power is reduced. While inlet guide vane (11) and variable stator

Gas turbine starting method is improved to start operation with bleed valves being first throttled, then fully opened on the way and then fully closed at 90% speed, thereby fluid unstableness phenomenon is suppressed and starter motor power is reduced. While inlet guide vane (11) and variable stator vanes (C1 to C5) are set to predetermined opening from starting to rated speed, bleed valves (1, 2, 3) are set to predetermined opening until 52% speed for the bleed valve (1) and until 51% speed each for the bleed valves (2, 3), then the bleed valves (1, 2, 3) are fully opened until the speed exceeds 90%, when they are fully closed for rated operation. In the prior art, starting operation is done with bleed valves being first fully opened until the speed is elevated to 90% and then fully closed, but in the present invention, air discharged into ambient air in vain can be reduced and thereby starter motor power can be also reduced.

대표청구항 ▼

[ What is claimed is:] [1.]1. A gas turbine starting method comprising a step of setting an inlet guide vane and a variable stator vane of a gas turbine compressor to a predetermined opening during a starting time from a start initiation to a rated speed, wherein a plurality of bleed valves of said

[ What is claimed is:] [1.]1. A gas turbine starting method comprising a step of setting an inlet guide vane and a variable stator vane of a gas turbine compressor to a predetermined opening during a starting time from a start initiation to a rated speed, wherein a plurality of bleed valves of said compressor are made variable of their openings and are controlled to a predetermined opening during said starting time.