| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbine bypass control device for controlling pressure of a high pressure side header and a low pressure side header connected to a turbine. SOLUTION: The control device 4 includes pressure controllers 41, 42, a high value selector 50, signal changers 51, 52, a quick open controller 40. Valves 21, 22 are provided in parallel with a bypass line of the turbine. The control device 4 controls opening of the valves 21, 22 by the high value selection control based on high side pressure and low side pressure before start of trip of a turbine. In a period until time T1 elapses from trip start, the quick controller 40 quickly opens the valve 21. At that time, the pressure controllers 41, 42 executes tracking based on openings of the valves 22, 21. After time T1 elapses from the trip start, the control device 4 controls opening of the valve 22 based on high side pressure, and controls opening of the valve 21 based on low side pressure. COPYRIGHT: (C)2009,JPO&INPIT
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