PLANT MONITORING DEVICE, PLANT MONITORING METHOD, AND PROGRAM

PROBLEM TO BE SOLVED: To provide a plant monitoring device capable of improving accuracy of plant state monitoring.SOLUTION: A plant monitoring device 100 comprises: a threshold value acquisition part 7; a determination part; and an alarm part 10. The threshold value acquisition part acquires in advance, a first threshold value indicating a first range of variation of first process values, and a second threshold value indicating a second value in which a variation range is wider than the first range, based on a value obtained by averaging variation of the first process values and a value indicating the variation. The determination part compares the first process values obtained in time series, and corresponding first threshold value and second threshold value, thereby determines whether or not, the first process values exceed one of the first threshold value and second threshold value. The alarm part outputs alarm information which contains at least information of a time point when, the first process values exceed one of the first threshold value and second threshold value, based on the determination result of the determination part.SELECTED DRAWING: Figure 2 【課題】プラントの状態監視の精度を向上させることが可能なプラント監視装置を提供する。【解決手段】プラント監視装置１００は、しきい値取得部７と、判定部と、警報部１０とを備える。しきい値取得部は、第１プロセス値のばらつきを平均して得られた値及びばらつきを示す値に基づき、第１プロセス値のばらつきの第１範囲を示す第１しきい値と、第１範囲よりもばらつきの範囲が広い第２範囲を示す第２しきい値とを予め得る。判定部は、時系列に得られた第１プロセス値と、対応する第１しきい値及び第２しきい値とを比較することで、第１プロセス値が第１しきい値及び第２しきい値のいずれかを超えたか否かを判定する。警報部は、判定部の判定結果に基づき、第１プロセス値が第１しきい値及び第２しきい値のいずれかを超えた時点の情報を少なくとも含む警報情報を発する。【選択図】図２