Gas turbine system equipped with variable speed generator connected to rotary shaft of low-pressure turbine of two-shaft gas turbine
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Feb 9, 2015
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Feb 9, 2015
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A gas turbine system (1) is equipped with: a two-shaft gas turbine (2) having a gas turbine compressor (10) that takes in and compresses air (A), a combustor (11) that mixes and burns compressed air (CA) generated by the gas turbine compressor (10) and fuel (F) to generate a combustion gas (CG), a high-pressure turbine (12) that is rotationally driven by the combustion gas (CG), and a low-pressure turbine (13) that is rotationally driven by the combustion gas (CG) after being used to rotationally drive the high-pressure turbine (12); a main compressor (3) that is driven by a rotational driving force from the low-pressure turbine (13) to compress a process gas (PG); a variable speed generator (4) that is provided between the main compressor (3) and the low-pressure turbine (13) and generates electric power by the rotational driving force of the low-pressure turbine (13); an inverter device (5) that is connected to the variable speed generator (4) and converts a frequency and a voltage of electric power (EP1) from the variable speed generator (4); and driven machines (6) that are driven by electric power from the inverter device (5).
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