OPERATION SUPPORT DEVICE FOR PLANT AND OPERATION SUPPORT METHOD

To stop a plant early to avoid an increase in costs of damage caused by a spread of abnormality in the event of the abnormality.SOLUTION: An operation assistance apparatus 200 includes: diagnostic means 500 for diagnosing an operating state of a plant 100 on the basis of operation data 3; abnormal spread prediction means 600 for predicting on the basis of a physical model a device to which abnormality spreads and time on the basis of a diagnostic result obtained by the diagnostic means 500; cost calculation means 700 for predicting a change of damage costs over time on the basis of a result of the abnormal spread prediction means 600; and plant stop determination means 800 for generating a signal for stopping the plant 100 if the damage costs are equal to or more than damage costs associated with an emergency stop of the plant 100, which has been determined in advance.SELECTED DRAWING: Figure 1 【課題】異常発生時には早期にプラントを停止し異常の波及に伴う損害コストの増加を回避することを目的とする。【解決手段】運転データ３に基づいてプラント１００の運転状態を診断する診断手段５００と、診断手段５００によって得られた診断結果をもとに物理モデルに基づいて異常が波及する機器と時間とを予測する異常波及予測手段６００と、異常波及予測手段６００結果に基づいて損害コストの経時変化を予測するコスト計算手段７００と、損害コストが予め定められた１００プラントの緊急停止に伴う損害コスト以上の場合にプラント１００を停止する信号を生成するプラント停止判定手段８００と、を備える運転支援装置２００。【選択図】図１