摘要:
A device for controlling a steam turbine and a combined cycle plant bypass system thereof includes: an acquisition module (9), for acquiring operating quantities measurements (Q HP , P HP ) of a combined cycle plant (1) including a gas turbine (2) and a steam turbine (3); a plurality of calculation modules (36-45), configured to determine, according to corresponding control modes, at least a first pressure set point (P HPCV ) for a regulator (30) of a high-pressure inlet valve (27a) and a second pressure set point (P HPBP ) for a regulator (30) of a high-pressure bypass valve (28a) of a high-pressure section (12) of the steam turbine (3); a supervisor module (35), configured to detect an operating condition of the plant (1) on the basis of the operating quantities (Q HP , P HP ) acquired by the acquisition module (9) and to selectively activate one of the calculation modules (36-45) in response to the detected operating condition.
摘要:
A device for controlling a steam turbine and a combined cycle plant bypass system thereof includes: an acquisition module (9), for acquiring operating quantities measurements (Q HP , P HP ) of a combined cycle plant (1) including a gas turbine (2) and a steam turbine (3); a plurality of calculation modules (36-45), configured to determine, according to corresponding control modes, at least a first pressure set point (P HPCV ) for a regulator (30) of a high-pressure inlet valve (27a) and a second pressure set point (P HPBP ) for a regulator (30) of a high-pressure bypass valve (28a) of a high-pressure section (12) of the steam turbine (3); a supervisor module (35), configured to detect an operating condition of the plant (1) on the basis of the operating quantities (Q HP , P HP ) acquired by the acquisition module (9) and to selectively activate one of the calculation modules (36-45) in response to the detected operating condition.
摘要:
A steam cooling system ( 30 ) and associated methods are provided which have a first high pressure (HP) steam turbine ( 12 ) having a straight through configuration, a second intermediate pressure (IP) steam turbine ( 16 ) having a straight through configuration positioned adjacent the first HP steam turbine ( 12 ), and a balance piston ( 40 ) positioned adjacent the inlet ( 17 ) of the second IP steam turbine ( 16 ) and between the second IP steam turbine ( 16 ) and the first HP steam turbine ( 12 ). A steam cooling conduit ( 32 ) is preferably positioned to have an inlet adjacent the first HP steam turbine ( 12 ) and an outlet adjacent the balance piston ( 40 ) for providing a steam cooling path therebetween. The system ( 10 ) also has a controller ( 31 ) positioned to control cooling steam pressure, a cooling steam control valve ( 35 ) connected to the conduit ( 32 ) and the controller ( 31 ), a first pressure sensor ( 33 ) in communication with the controller ( 31 ) and positioned adjacent the inlet ( 17 ) of the IP turbine ( 16 ) and downstream from the balance piston ( 40 ) for sensing inlet pressure to the second IP steam turbine ( 16 ), and a second pressure sensor ( 34 ) positioned in communication with the controller ( 31 ) in the conduit ( 32 ) upstream from the first pressure sensor ( 33 ) and the balance piston ( 40 ) and downstream from the cooling steam control valve ( 35 ) for sensing conduit cooling steam pressure so that the cooling steam control valve ( 35 ) operationally opens and closes to maintain the cooling steam conduit pressure at a predetermined level greater than the inlet pressure of the second IP turbine ( 16 ).
摘要:
The invention relates to a device for controlling a steam mass flow (m) in the case of a steam turbine (2). The device comprises at least one rotary slide (5) and a further control valve (6), which are arranged parallel to each other in a flow path of the steam turbine. The device (1) also comprises at least one control apparatus (7), which determines a pressure difference (Δp) between the pressure before and the pressure after the device (1) and controls the rotary slide (5) and/or the control valve (6) in accordance with the pressure difference (Δp). The invention further relates to a method for controlling a steam mass flow (m) in the case of a steam turbine (2) having such a device (1).