Title:
【発明の名称】部分送入型蒸気タービンの弁絞り度減少方法及び蒸気タービン発電装置
Document Type and Number:
Japanese Patent JP2747525
Kind Code:
B2
Abstract:
A steam turbine power generation generation system includes a partial-arc stem turbine connected in driving relationship to an electric power generator and a boiler system for supplying steam at a predetermined pressure and temperature to the turbine. The boiler system includes a primary superheater, a serially connected division valve for controlling steam flow and pressure and a finish superheater. The turbine system includes a plurality of control valves for controlling steam admission to each partial-arc and a microcomputer base control means for controlling operation of the control valves and the division valve in response to load demands on the system so as to maintain constant speed operation of the steam turbine. The control means provides control signals to the division valve and the control valves for synchronizing operation of the division valve with sequential closing of each of the control valves with the division valve being operated to reduce steam pressure for effecting a reduction in steam flow in accordance with an optimum heat rate for an existing arc of steam admission. Each control valve is operated to modify the arc of admission with constant steam pressure when such modification provides a better heat rate than sliding pressure using the division valve.
Inventors:
JOOJI JOSEFU SHIRUBESUTORI JUNIA
Application Number:
JP17889989A
Publication Date:
May 06, 1998
Filing Date:
July 10, 1989
Export Citation:
Assignee:
UESUCHINGUHAUSU EREKUTORITSUKU CORP
International Classes:
F01D17/20; F01K13/02; F01D17/00; (IPC1-7): F01D17/00; F01D17/20
Other References:
【文献】米国特許4297848(US,A)
Attorney, Agent or Firm:
Koichiro Kato (1 person outside)