초록 ▼

A gas turbine group is provided with at least one cooling apparatus for cooling the working medium before and/or during the compression. The cooling power of the cooling apparatus can be adjusted by suitable means. A controller controls the cooling power of the cooling apparatus as a function of a

A gas turbine group is provided with at least one cooling apparatus for cooling the working medium before and/or during the compression. The cooling power of the cooling apparatus can be adjusted by suitable means. A controller controls the cooling power of the cooling apparatus as a function of a control deviation in the useful power of the gas turbine group. The cooling controller interacts with other controllers of the gas turbine group in such a way that the gas turbine group is itself always operated at least close to its full load operating state. In this context, it is preferable for the inlet guide vane row of the compressor to be maximally open, and for the hot-gas temperature on entry into the turbines to be controlled so that it is constantly at an upper limit value.

대표청구항 ▼

What is claimed is: 1. A method for operating a gas turbine group, the method comprising: compressing a working fluid in at least one compressor; supplying a heat flux to the compressed working fluid in a heat supply component thus heating the compressed working fluid; passing the heated working

What is claimed is: 1. A method for operating a gas turbine group, the method comprising: compressing a working fluid in at least one compressor; supplying a heat flux to the compressed working fluid in a heat supply component thus heating the compressed working fluid; passing the heated working fluid from the heat supply component into at least one turbine; expanding the working fluid in said turbine; generating shaft power while expanding the working fluid in the turbine; driving the compressor with a first fraction of the shaft power; driving a power consumer with remaining useful shaft power; cooling the working fluid by applying a cooling power at a position selected from the group consisting of before the compression, during the compression, and both before and during the compression; regulating the cooling power dependent on a control deviation of the useful shaft power; evening out the control deviation in regulating the cooling power; in parallel with regulating the cooling power regulating the heat flux supplied to the compressed working fluid for continuously maintaining at least a turbine inlet temperature of the working fluid substantially constant. 2. The method of claim 1, further comprising maintaining a constant position of an adjustable inlet guide vane row. 3. The method of claim 2, further comprising maintaining the inlet guide vane row in a fully open position. 4. The method of claim 1, further comprising: partially expanding the working fluid in one selected from the group consisting of at least one turbine and at least one turbine stage; and at least once supplying heat to a working fluid that has thus been partially expanded, and thereafter passing the working fluid to a further one selected from the group consisting of at least one turbine and at least one turbine stage. 5. The method of claim 1, further comprising: determining at least one process variable, and indirectly determining the useful shaft power as a function of one selected from the group consisting of a process variable and a combination of at least two process variables. 6. The method of claim 5, wherein the process variable is selected from the group consisting of a exhaust-gas temperature, a turbine inlet temperature, ambient conditions, a compressor exit pressure, a compressor intermediate pressure, setting of variable compressor guide vane rows, and a combination of at least two of said variables. 7. The method of claim 1, further comprising applying the cooling power in passing one of an uncompressed working medium or partially compressed working medium through a primary side of a heat exchanger or around a primary side of a heat exchanger, or both, and providing a coolant to the secondary side of the heat exchanger. 8. The method of claim 7, further comprising adjusting the cooling power in adjusting at least one selected from the group consisting of the feed temperature of the coolant and the coolant mass flow. 9. The method of claim 1, further comprising applying the cooling power in passing at least one selected from the group consisting of the uncompressed working fluid and the partially compressed working fluid over the wetted surface of an evaporative cooler. 10. The method of claim 9, further comprising adjusting the cooling power in varying flow of liquid over the wetted surface of the cooler. 11. The method of claim 1, further comprising applying the cooling power in injecting a liquid into the working fluid. 12. The method of claim 11, further comprising injecting the liquid into uncompressed working fluid upstream of the compressor. 13. The method of claim 11, further comprising injecting the liquid into a partially compressed working fluid. 14. The method of claim 11, further comprising adjusting the cooling power by varying flow of the liquid injected into the working medium. 15. The method of claim 1, further comprising supplying a supplemental medium into at least a part of the compressed working fluid at a position selected from the group consisting of upstream of the heat supply component, in the heat supply component, immediately downstream of the heat supply component, or any combination thereof, to further increase useful power output of the gas turbine group. 16. The method of claim 15, further comprising supplying steam. 17. The method of claim 15, further comprising supplying water. 18. The method of claim 1, further comprising supplying a fuel mass flow into the working fluid in the heat supply component and burning said fuel mass flow in the working fluid, thus supplying heat. 19. The method of claim 18, further comprising adjusting the heat flux by adjusting the fuel mass flow. 20. A method for operating a gas turbine group, the method comprising: compressing a working fluid in at least one compressor; supplying a heat flux to the compressed working fluid in a heat supply component thus heating the compressed working fluid; passing the heated working fluid from the heat supply component into at least one turbine; expanding the working fluid in said turbine; generating shaft power while expanding the working fluid in the turbine; driving the compressor with a first fraction of the shaft power; driving a power consumer with remaining useful shaft power; injecting a liquid droplet mass flow into the working fluid at a position selected from the group consisting of before the compression, during the compression, and both before and during the compression; regulating the liquid droplet mass flow dependent on a control deviation of the useful shaft power; evening out the control deviation in regulating the liquid droplet mass flow; in parallel with regulating the cooling power regulating the heat flux supplied to the compressed working fluid for continuously maintaining at least a turbine inlet temperature of the working fluid substantially constant. 21. A method for operating a gas turbine group, the method comprising: compressing a working fluid in at least one compressor; supplying a heat flux to the compressed working fluid in a heat supply component thus heating the compressed working fluid; passing the heated working fluid from the heat supply component into at least one turbine; expanding the working fluid in said turbine; generating shaft power while expanding the working fluid in the turbine; driving the compressor with a first fraction of the shaft power; driving a power consumer with remaining useful shaft power; injecting a liquid droplet mass flow into the working fluid at a position selected from the group consisting of before the compression, during the compression, and both before and during the compression; regulating the liquid droplet mass flow dependent on a control deviation of the useful shaft power; evening out the control deviation in regulating the liquid droplet mass flow; maintaining a variable inlet guide vane row of the compressor at a constant position; in parallel with regulating the cooling power regulating the heat flux supplied to the compressed working fluid for continuously maintaining at least a turbine inlet temperature of the working fluid substantially constant. 22. A method for operating a gas turbine group, the method comprising: compressing a working fluid in at least one compressor; introducing a fuel mass flow into the compressed working fluid in a combustion chamber; burning fuel from the fuel mass flow in the working fluid in the combustion chamber, thus heating the working fluid; passing the heated working fluid from a heat supply component into at least one turbine; expanding the working fluid in said turbine; generating shaft power while expanding the working fluid in the turbine; driving the compressor with a first fraction of the shaft power; driving a power consumer with remaining useful shaft power; cooling the working fluid by applying a cooling power at a position selected from the group consisting of before the compression, during the compression, and both before and during the compression; regulating the cooling power dependent on a control deviation of the useful shaft power; evening out the control deviation in regulating the cooling power; in parallel with regulating the cooling power regulating the fuel mass flow for continuously maintaining at least a turbine inlet temperature of the working fluid substantially constant. 23. A method for operating a gas turbine group, the method comprising: compressing a working fluid in at least one compressor; introducing a fuel mass flow into the compressed working fluid in a combustion chamber; burning fuel from the fuel mass flow in the working fluid in the combustion chamber, thus heating the working fluid; passing the heated working fluid from a heat supply component into at least one turbine; expanding the working fluid in said turbine; generating shaft power while expanding the working fluid in the turbine; driving the compressor with a first fraction of the shaft power; driving a power consumer with remaining useful shaft power; cooling the working fluid by applying a cooling power at a position selected from the group consisting of before the compression, during the compression, and both before and during the compression; regulating the cooling power dependent on a control deviation of the useful shaft power; evening out the control deviation in regulating the cooling power; maintaining a variable inlet guide vane row of the compressor at a constant position; in parallel with regulating the cooling power regulating the fuel mass flow for continuously maintaining at least a turbine inlet temperature of the working fluid substantially constant.