Kabushiki Kaisha Toshiba

Kaoru Takahara

Keiko Ootani

Tsuneo Watanabe

Akiyoshi Sudo

Hiroaki Tonoyama

Kenji Kuroumaru

Atsushi Matsumoto

In one embodiment, a plant monitoring system includes a threshold acquiring module, a judging module, and a warning module. The threshold acquiring module acquires in advance, based on a value obtained by leveling the dispersion in first process values corresponding to output values at a first point in a monitoring object and a value representing the dispersion, first thresholds representing a first range of the dispersion in the first process values and second thresholds representing a second range. The judging module compares the first process values chronologically acquired based on the output values at the first point with the corresponding first thresholds and second thresholds. The warning module creates alert information containing information on at least a time point when the first process value exceeds one of the first thresholds and the second thresholds.

Plant monitoring system, plant monitoring method, and program storage medium

A plant alarm apparatus has: plant data input means for periodically taking in plant data; a latest plant data value table for temporarily storing latest values of the plant data; plant data recording means for taking out the latest values of the data of the latest plant data value table and storing them in a plant history data table; alarm-triggering value alteration means for updating the points for detecting plant abnormality in an alarm-triggering value registration table in response to a request by an operator; alarm-triggering condition editing means for registering alarm-triggering conditions of points showing a foretoken of abnormality; deviation-from-limit-value determining means for reading the stored values of the alarm-triggering value registration table and the alarm-triggering condition table and comparing the limit values of the points for detecting abnormality; and alarm notification output means for outputting the outcome of the comparison.

Plant alarm apparatus and plant alarm method

Growing community of inventors

Tokyo, Japan

Kaoru Takahara