DRIVE GAS-TURBINE PLANT OF GAS COMPRESSOR UNIT WITH UTILISATION TURBINE PLANT FOR INDEPENDENT POWER SUPPLY Russian patent published in 2017 - IPC F02C6/00 F02C7/36 

FIELD: power industry.

SUBSTANCE: invention can be used for development or reconstruction of multi-shaft gas turbine plants (GTP) designed for natural gas supercharger drive in gas pumping units (GPU) and providing independent power supply for compressor stations with these GPU. The drive GTP GPU with the utilisation turbine plant for independent power supply contains a multi-shaft gas turbine engine 1 with main compressor 7, a drive turbine 8, a power turbine 9 and a utilisation turbine plant (UTP) comprising an air heater 2, communicated at the inlet to the heating gas with the outlet of the power turbine 9 for exhaust gases, a compressor 3 communicated at the air inlet with the atmosphere, a turbo-generator 4, equipped with frequency converting unit (converter) of the frequency alternator (FA) 11, made with the possibility of supplying voltage of alternating frequency and amplitude to the consumers of alternating current with constant voltage and amplitude and is electrically connected at the output voltage through a switchgear 17 with consumers of alternative current of constant frequency 50 (60) Hz, the air turbine 5, which is connected at the air inlet through the air heater path 2 through the air with the outlet of the compressor 3 through the air, at the air outlet - with the atmosphere, mounted on the same shaft with the compressor 3 and turbogenerator 4 - shaft 6, kinematically connected through the coupling 10 with the main compressor shaft 7 from the input side of the main compressor 7 by air, the gas cooler 12 and the smoke exhauster 13, communicated at the gas inlet through the gas cooler path 12 through the cooling gas with air heater inlet 2, at outlet through gas with the atmosphere. The gas exhauster 13 is provided with electric motor 14 with a frequency converter 15 electrically connected with electrical circuit 16 to turbogenerator outlet 4 via alternating frequency voltage or with the FA outlet 11 through constant frequency voltage.

EFFECT: provide approximate equality of coolant flow in the air heater of the utilisation turbine plant, as well as the transfer of the surplus power capacity of the utilizing turbine as compared to the current power consumption, and in the cold period - the surplus power capacity of the drive turbine of the gas turbine engine to the power shaft of the gas turbine engine in order to increase the efficiency of the gas turbine plant and the annual efficiency of the gas turbine plant with the utilisation turbine installation as a whole.

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