Title:
STEAM TURBINE CONTROL
Document Type and Number:
Japanese Patent JPS6011605
Kind Code:
A
Abstract:
PURPOSE:To curb abrupt uprise of a turbine rotation, by providing two normally closed valves which are arranged in series in steaming systems leading to the steam turbine, in order to let the second valve start turbine control, as well as the first valve is fully opened, when the second valve becomes ready to operate. CONSTITUTION:Initial opening of a motor driven valve 1 is established through function generators 12-14, based on each output signal from a main steam pressure detector 10 and feed-water hydrometer 11 when the cooling system of a nuclear reactor in an atomic power station of boiling water model starts at a time of atomic segregation. Rotational frequency of a steam turbine 4 is controlled by letting a governing valve 3 start closing from its full opening when the steam turbine 4 is started and rotational frequency is raised up to specified level. On the other hand, a motor driven valve 1 is fully opened as per the output of full opening signal generator 15, after exciting a relay 19 via logic circuit 16 according to a control oil pressure establishment signal 23a, rotational frequency signal 21a denoting that turbine frequency goes beyond the specified level and an opening signal 22a indicating start of closing of governing valve 3.
Inventors:
KATAYAMA AKIRA
Application Number:
JP11796283A
Publication Date:
January 21, 1985
Filing Date:
June 29, 1983
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
F01D17/00; F01D17/10; (IPC1-7): F01D17/00
Attorney, Agent or Firm:
Kiyoshi Inomata
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