AUXILIARY STEAM SUPPLY METHOD FOR COMBINED CYCLE POWER PLANT

Japanese Patent JPH05272305

A

PURPOSE:To realize stable supply of auxiliary steam by opening outflow valves and check valves after selecting two power generation shafts in distant relationship among steam supply possible power generation shafts as auxiliary steam supply shafts, and closing outflow valves and check valves of the other power generation shafts. CONSTITUTION:This combined cycle power plant is composed of plural number of power generation shafts formed by using a gas turbine 5, steam turbines 9 and 10, a generator 11 and an exhaust heat recovery boiler 6 as main constituents. Low temperature reheat steam of the respective steam turbines 9 and 10 is connected to a common auxiliary steam base pipe through respective outflow valves 12 and check valves 13. A recapitulative control device 27 carries out an opening operation and a closing operation on the outflow valves 12 of respective shafts. A judging circuit being constituted inside of the recapitulative control device 27 selects two shafts mutually in most distant positions among shafts in a steam supply possible condition. It also carries out an opening operation on the outflow valves 12 of these shafts, and acts to carry out a closing operation on the outflow valves 12 of the other shafts. In this way, stable supply of auxiliary steam can be realized.

Our room Masayuki
Hajime Shiomi
Mitsunobu Nakajo

JP6895692A

October 19, 1993

March 27, 1992

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Toshiba Corporation

F01D19/00; F01K7/24; F01K23/10; F02C6/18; F02C7/277; (IPC1-7): F01K23/10; F01D19/00; F01K7/24; F02C6/18; F02C7/277

Noriyuki Noriyuki

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