| 摘要 |
PROBLEM TO BE SOLVED: To rapidly secure the quantity of steam supply to a condensing steam turbine to which a high pressure steam essential load facility is connected, when steam generating flow in a steam generating facility 1 is reduced. SOLUTION: A difference valueδbetween the steam flow generated in the steam generating facility 1, and the quantity of steam supplied to the back pressure steam turbine 6 side, is detected, and the difference between the difference valueδand a target valueδ* is successively detected as a target restriction steam quantity▵F. When the steam generating facility 1 trips, a target value F* of the steam supply quantity to the back pressure steam turbine 6 side when reducing the present steam quantity supplied to the back pressure steam turbine 6 side, by the target restriction steam quantity▵F, is computed, and valve opening V* of a governing valve 12 that can realize the target value F* is detected from the target value F* and a predetermined characteristic chart. The valve opening of the governing valve 12 is then adjusted to become the valve opening V*. COPYRIGHT: (C)2004,JPO
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