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公开(公告)号：US10072532B2
公开(公告)日：2018-09-11
申请号：US14199312
申请日：2014-03-06
Applicant: ALSTOM Technology Ltd
Inventor： Hamid Olia , Jan Schlesier , Michael Breitfeld , Philipp Brunner , Mark Stevens , Michael Caflisch
Abstract: A method for starting-up a steam turbine of a combined-cycle power plant is provided. The combined-cycle power plant includes a gas turbine and a steam power generation system having a steam turbine. The combined-cycle power plant activates at least one electric generator connectable to an electric grid. The gas turbine includes a compressor, such that, during starting-up of the steam turbine, both the gas turbine and the steam turbine are in operation. The steam turbine adjusts its load as a function of the load of the gas turbine in such a way that the sum of the load provided by the gas turbine and of the load provided by the steam turbine is equal to the auxiliary power demand of the plant. The load exported to the grid is equal to zero.
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公开(公告)号：US09882453B2
公开(公告)日：2018-01-30
申请号：US14182390
申请日：2014-02-18
Applicant: ALSTOM Technology Ltd
Inventor： Jan Schlesier , Hamid Olia , Martin Schoenenberger
CPC classification number: H02K7/1823 , F01K23/101 , H02K7/183 , Y02E20/16
Abstract: The disclosure refers to a method for providing a frequency response for a combined cycle power plant connected to an electric grid. The combined cycle power plant includes a gas turbine engine and a steam turbine engine. The steam turbine engine includes a boiler, a steam turbine, a pump, a condenser, a bypass for the steam turbine, a steam admission control valve. The steam turbine engine operates with the bypass closed or at least partly open to supply steam from the boiler to the condenser bypassing the steam turbine, and/or with the steam admission control valve at least partly open. The method comprises regulating the output load of the combined cycle power plant by regulating the steam admission control valve and/or by regulating the steam flow through the bypass in response to a frequency change of the electric grid. The output of the gas turbine can also be adjusted, such that steam generated by the boiler is sufficient to achieve the target load for the steam turbine.
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公开(公告)号：US09605564B2
公开(公告)日：2017-03-28
申请号：US14488344
申请日：2014-09-17
Applicant: ALSTOM Technology Ltd
Inventor： Wolfgang Franz Dietrich Mohr , Hamid Olia , Miguel Angel Carrillo Rubio , Juergen Reinhard
CPC classification number: F01K13/02 , F01D19/00 , F01D21/00 , F01K9/003 , F01K9/023 , F01K23/10 , Y02E20/16
Abstract: The invention relates to a method for operating a steam power plant, particularly a combined cycle power plant, which includes a gas turbine an a steam/water cycle with a heat recovery steam generator, through which the exhaust gases of the gas turbine flow, a water-cooled condenser, a feedwater pump and a steam turbine. A cooling water pump is provided for pumping cooling water through said water-cooled condenser. Evacuating means are connected to the water-cooled condenser for evacuating at least said water-cooled condenser. The method relates to a shut down and start-up of the power plant after the shutdown. The method includes: a) shut down of the steam turbine and gas turbine and/or a combustor of said gas turbine ; b) restoration of a good vacuum within the condenser by using said evacuating means; c) stopping said cooling water pump of said water-cooled condenser and said evacuating means, and filling up at least said condenser with steam up to slightly above atmospheric pressure; d) controlling the pressure with a flow of said cooling water; e) after a certain shut-down period starting the cooling water pump just before start-up of the plant; and f) starting the plant.
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公开(公告)号：US09631521B2
公开(公告)日：2017-04-25
申请号：US14199506
申请日：2014-03-06
Applicant: ALSTOM Technology Ltd
Inventor： Hamid Olia , Jan Schlesier , Michael Breitfeld , Philipp Brunner
CPC classification number: F01K23/10 , F01K13/02 , F01K23/101 , F02C6/18 , F05D2220/76 , F05D2270/061 , Y02E20/14 , Y02E20/16
Abstract: Method for operating a combined-cycle power plant is provided. The plant includes at least a gas turbine and at least a steam power generation system. The plant activates at least one electric generator connectable to an electric grid, wherein the gas turbine includes a compressor. The steam power generation system includes a steam turbine, a heat recovery steam generator and a bypass line. The method is such that the gas turbine de-loads to a condition, where the compressor operates at its nominal speed. The method is such that the steam turbine de-loads in coordination with the de-load of the gas turbine, to a condition where the total load exported by the plant to the grid is substantially equal to zero, being both the gas turbine and the steam power generation system connected.
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