| 摘要 |
PROBLEM TO BE SOLVED: To provide a multiplexed steam-turbine control system by which even though a failure occurs in a multiplexed pressure controller, no disturbance is caused in the control. SOLUTION: A pressure setting device 22 of each triple pressure controller includes the following devices an median selector 8A which obtains a median pressure-deviation signal out of three pressure-deviation signals P23A, P23B, P23C of the triple pressure controller, a coefficient multiplexer 11A which multiplies by a coefficient a pressure-deviation difference signal obtained by diminishing a pressure-deviation signal in the self-system from a median pressure-deviation signal obtained by the median selector 8A, and an integrator 225A which integrates additional signals of an output of the coefficient multiplier 11A and pressure setting increase/decrease signals to output the value as a pressure-setting signal. COPYRIGHT: (C)2009,JPO&INPIT
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