| This study is part of a broader scope research program aimed at defining the man-machine interface (MMI) for a second generation's electric substations and power plants computerized control system. One aspect of this MMI is the alarm's display. The goal of the study is to test three different ways to display alarms in an hydroelectric power plant: (1) a list showing the current state of alarms (the control part of the MMI is separate), (2) pictograms in the control part of the MMI, thus showing the alarms integrated within the diagram of the process (topographic annunciator), (3) a chronological list of transitions as found today on control systems (the control part of the MMI is separate).; Regarding the rapid understanding of a complex event by an operator, we made the hypothesis that the topographic annunciator would be best. When the one-line diagram of the process is not available, we made the hypothesis that the list showing the current state of the alarms would be better than the chronological list annunciator. (Abstract shortened by UMI.)... |
