COAL GASIFICATION FUEL CELL COMBINED POWER GENERATING PLANT AND OPERATING METHOD THEREOF

Japanese Patent JP2002364312

A

To suitably control generated energy by following a load command at the time of changing a plant load.

By using refined gas generated by a gas refining facility 12b as fuel gas, a fuel cell 97 generates electric power. A gas turbine 25 is driven by fuel gas generated by combustion of a combustor 22, thereby generating electric power. A steam turbine 31 is driven according to supperheated steam heated by a exhaust heat boiler 27 to generate electric power. In the process mentioned above, after fully closing a fuel cell adjusting valve 15 and opening a bypass line adjusting valve 24 at the time of plant load lowering operation, the bypass line adjusting valve 24 is gradually closed according to a bypass line adjusting valve command 50 for making a deviation between total generated energy by driving of each turbine and generated energy by designation of a load command 48 zero, and the fuel cell adjusting valve 15 is opened according to fuel cell adjusting valve command 42 for making the pressure by measurement of a pressure gage 41 agree with a target pressure value 42, namely making the pressure in an inlet side of the gas turbine agree with the target pressure value 42.

KUSUMI HISAHIRO
KATAGIRI YUKINORI
KISO FUMIHIKO
YAMADA AKIHIKO
NAGASAKI NOBUO
TSUJIGUCHI SATOSHI
OKAWA MASABUMI

JP2001166960A

December 18, 2002

June 01, 2001

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HITACHI LTD
ELECTRIC POWER DEV CO

F01K23/10; C10J3/20; F01K23/02; F02C3/28; F02C9/28; H01M8/00; H01M8/04; H01M8/06; (IPC1-7): F01K23/10; C10J3/20; F01K23/02; F02C3/28; F02C9/28; H01M8/00; H01M8/04; H01M8/06

Hirotsugu Yoshioka

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