ELECTRIC POWER GENERATION PLANT, STEAM COOLING SYSTEM AND CONTROL DEVICE AND CONTROL METHOD THEREFOR

To control a cooling water flow volume to a proper range.SOLUTION: A steam cooling system comprises a first adjusting valve for adjusting the flow volume of cooling water to be supplied from a cooling tower to a condenser, and a second adjusting valve for adjusting the flow volume of warm water to be supplied from the condenser to the cooling tower. A control device comprises a measurement value acquisition portion 51 acquiring a measurement value of a parameter related to the steam cooling system including differential pressure ΔPcg between atmospheric pressure and condenser pressure which is pressure of an internal space of the condenser, and a calculation portion 52 calculating the opening Z1 of the first adjusting valve on the basis of information for calculating the opening Z1 of the first adjusting valve, wherein the opening Z2 of the second adjusting valve is a target value of the opening Z1, from the parameter related to the steam cooling system, and the measurement value acquired by the measurement value acquisition portion 51.SELECTED DRAWING: Figure 4 【課題】冷却水流量を適切な範囲に制御すること。【解決手段】蒸気冷却システムは、冷却塔から復水器へ供給される冷却水の流量を調整するための第１調整弁と、復水器から冷却塔へ供給される温水の流量を調整するための第２調整弁とを備える。制御装置は、大気圧と復水器の内部空間の圧力である復水器圧力との差圧ΔＰｃｇを含む、蒸気冷却システムに関するパラメータの計測値を取得する計測値取得部５１と、蒸気冷却システムに関するパラメータから第２調整弁の開度Ｚ２を目標値とする第１調整弁の開度Ｚ１を算出するための情報と、計測値取得部５１によって取得された計測値とに基づいて、第１調整弁の開度Ｚ１を算出する算出部５２とを備える。【選択図】図４