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US 10,240,487 B2Granted
Method for startup and management of a combined cycle heating system for the production of power
AssigneeStamicarbon B.V.
InventorEzio Pasqualon
Life of this patent
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Abstract
A method to start up and manage a combined cycle thermal plant for energy production comprising the execution according to a set sequence of a plurality of functional groups.
Claims9
A method to start up and manage a combined cycle thermal plant for energy production comprising a first gas turbine and generator group (TG1), a first steam generator (GRV1), a multistage steam turbine (TV) and a separate generator coupled to said steam turbine (TV) wherein:
- said first steam generator (GRV1) is a recovery steam generator to utilize the latent heat of the exhaust gases of said first gas turbine and generator group (TG1);
- said first steam generator (GRV1) is in fluid communication through steam lines at high, medium and low pressure with corresponding stages at high, medium and low pressure of said steam turbine (TV) and
- said separate generator is kinematically coupled to said steam turbine to be rotationally operated;
- and
- said method comprising monitoring and detecting a plurality of parameters that determine correct functioning and/or malfunctioning of said first gas turbine and generator group (TG1), of said first steam generator (GRV1) and of said steam turbine (TV), and wherein the method further comprises starting up the plant from an off-state which starting up comprises, in order, the following sequential operations:
- Operation GF1A:
- preparing said first gas turbine and generator group (TG1) for start up;
- Operation GF2A:
- starting said first gas turbine and generator group (TG1) and pressurizing said first steam generator (GRV1);
- Operation GF3A:
- warming up and increasing the load of said steam turbine (TV) following starting said first gas turbine and generator group (TG1);
- wherein said method further comprises:
- verifying completion of said operation GF1A and, subordinate to the completion of said operation GF1A automatically implementing operation GF2A and
- verifying completion of said operation GF2A and, subordinate to completion of operation GF2A automatically implementing operation GF3A
- so that the starting up is automatically carried out.
12 more elements
A combined cycle thermal plant to produce energy comprising:
- a) a first gas turbine and generator group (TG1),
- b) a first recovery steam generator (GRV1) to utilize the latent heat of the exhaust gases of said first gas turbine and generator group (TG1),
- c) a steam turbine (TV) with high, medium and low stage pressure in fluid communication with said first steam generator (GRV1) through high, medium and low pressure steam lines;
- d) a separate generator kinematically coupled to said steam turbine (TV) to be rotationally operated;
- e) a detection and control device to monitor and detect a plurality of parameters that determine correct functioning and/or malfunctioning of said plant, wherein said plant further comprises a control and processing unit that memorizes:
- i) each single operation in sequence of sequential operations necessary to obtain the start/stop of each of the components a) to d) of the plant said start/stop defined as starting from off and/or partial or total on conditions and
- ii) for each of said operations in sequence of sequential operations, plant conditions to be detected by said detection and control device and associated with the execution of each operation in said sequence of sequential operations,
- wherein said control and processing unit is connected to said detection and control device which control and processing unit functions so as to
- acquire and process information concerning the functioning and/or malfunctioning status of said plant;
- further to a request for a specific start/stop sequence among the memorized start/stop sequences, to automatically start in succession the operations of said sequential operations subordinate to detecting by monitoring of all conditions necessary for said sequential operations to be carried out thus allowing start of each operation of the required sequential operations, by verifying correct achievement of the plant conditions as a consequence of the correct execution of an operation previous to starting the following operation within the same sequential operations, and
- wherein said specific start/stop sequence comprises, in order, the following sequential operations:
- Operation GF1A:
- preparing said first gas turbine and generator group (TG1) for start up;
- Operation GF2A:
- starting said first gas turbine and generator group (TG1) and pressurizing said first steam generator (GRV1);
- and
- Operation GF3A:
- warming up and increasing the load of said steam turbine (TV) following starting said first gas turbine and generator group (TG1).
15 more elements
Dependencies are inferred from the claim text.