(19)
(11) EP 2 157 290 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
26.05.2010 Bulletin 2010/21

(43) Date of publication:
24.02.2010 Bulletin 2010/08

(21) Application number: 08425569.4

(22) Date of filing: 21.08.2008
(51) International Patent Classification (IPC): 
F01K 7/20(2006.01)
F01K 23/10(2006.01)
 F01K 13/02(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(71) Applicant: ANSALDO ENERGIA S.P.A.
16152 Genova (IT)

(72) Inventors:
  • Repetto, Enrico
    16149 Genova (IT)
  • Gruppi, Pietro
    16146 Genova (IT)

(74) Representative: Bongiovanni, Simone et al
STUDIO TORTA Via Viotti 9
10121 Torino
10121 Torino (IT)

   


(54) A device and method for controlling the pressure of a steam turbine of a combined cycle plant of the "2+1" type and a bypass system thereof


(57) A control device of a steam turbine of a combined cycle plant includes an acquisition module (13), for acquiring measures of operative quantities (QHP1, QHP2, PHP) of a combined cycle plant (1) including a steam turbine (5) and a first and second steam feeding systems (100, 101). The device further includes a plurality of calculation modules (47-56, 47'-56'), configured for determining, according to corresponding control modes: a pressure set point (PHPCV) for a high-pressure inlet valve (25); a pressure set point (PIPCV) for an intermediate-pressure inlet valve (30) of the steam turbine (5); and pressure set points (PHPBP1, PHPBP2, PIPBP1, PIPBP2) for high-pressure bypass valves (28a, 28b) and intermediate-pressure bypass valves (33a, 33b). Furthermore, a supervisor module (45) is configured to detect an operating condition of the plant (1) on the basis of operative quantities (QHP1, QHP2, PHP) acquired by the acquisition module (13) and selectively activate one of the calculation modules (47-56, 47'-56') in response to the detected operating condition.