Title:
COMBINED CYCLE POWER GENERATION PLANT, AND OPERATION METHOD OF THE SAME
Document Type and Number:
Japanese Patent JP2019173696
Kind Code:
A
Abstract:
To reduce thermal stress generated inside a steam turbine and generated when a gas turbine is suddenly started, or transitions from simple cycle operation to combined cycle operation, in a combined cycle power generation plant.SOLUTION: The combined cycle power generation plant is provided that is composed of a gas turbine, a waste heat recovery boiler generating steam by heat exchange with an exhaust gas of the gas turbine, a steam turbine obtaining power using the steam generated by the waste heat recovery boiler, a steam regulation valve regulating an amount of steam flowing into the steam turbine, and a power generator converting the power of the gas turbine and the steam turbine into electric power, the combined cycle power generation plant further includes: at least one extraction system supplying the extraction steam extracted from outlets excluding an outlet of the last heat exchanger closest to an inflow port for gas turbine exhaust gas, in a group of heat exchangers in the waste gas recovery boiler, to the steam turbine; and an extraction valve controlling an extraction amount of the extraction steam passing through the extraction system.SELECTED DRAWING: Figure 1
Inventors:
YOSHIDA YASUHIRO
KOBAYASHI YOSHINOBU
KIYONO TAKAMASA
KATAGIRI YUKINORI
KOBAYASHI YOSHINOBU
KIYONO TAKAMASA
KATAGIRI YUKINORI
Application Number:
JP2018064585A
Publication Date:
October 10, 2019
Filing Date:
March 29, 2018
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01K23/10; F01D17/00; F01D17/10; F01K9/04; F01K13/02; F02G5/02
Attorney, Agent or Firm:
Polaire Patent Business Corporation