METHOD FOR OPERATING GAS COMPRESSOR, AND GAS TURBINE PROVIDED WITH GAS COMPRESSOR

摘要

Disclosed is a method for operating a gas compressor which compresses a gas fuel, a supply condition of which fluctuates, and is provided with a suction flow rate adjustment mechanism, wherein the limit pressure ratio that defines the operational limit of the pressure ratio relative to the suction flow rate of the gas compressor or relative to the opening of the suction flow rate adjust-ment mechanism, and that prevents surging of the gas compressor is corrected by multiplying, by a first correction factor calculated in response to an operation state detection value of the gas compressor, the reference limit pressure ratio calculated by a design condition of the gas compressor.