Title:
VALVE CONTROLLER OF STEAM TURBINE
Document Type and Number:
Japanese Patent JPH0571308
Kind Code:
A
Abstract:
PURPOSE:To get a valve controller which has stability in the usual operation of a steam turbine, and has quick responsiveness in system fault, high-speed valve control, or the like. CONSTITUTION:For a main servo pressure distribution valve 37, the property of the area of the opening of the port corresponding to the displacement of the spool 37b of the main servo pressure distribution valve 37 is made nonlinear, and the gain in the range where the displacement of the spool 37b of the main servo pressure distribution valve 37 is made smaller than the gain in the range where the displacement of the spool 37b is larger than it. Hereby, the control can be stabilized in the valanced operation state, and in such a case as load break or high-speed valve control, it can cope with the change quickly.
Inventors:
NEGISHI TORU
Application Number:
JP26094191A
Publication Date:
March 23, 1993
Filing Date:
September 12, 1991
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
F01D25/00; (IPC1-7): F01D25/00
Attorney, Agent or Firm:
Yoshihide Komada
Next Patent: JPH0571309