A method and system for judging the stability of statistical distribution of alarm duration

Abstract

The invention relates to a method and system for determining alarm duration statistical distribution stability. The method includes the steps of sorting acquired original signals to obtain an alarm duration set of all alarming signals, constructing an alarm duration probability density function and a standard variance function according to the alarm duration set, removing the alarm duration of low occurrence frequency from the alarm duration set, obtaining the screened alarm duration set, plugging the values of the screened alarm duration set respectively in the alarm duration probability density function and the standard variance function, and determining the statistical distribution stability of the alarm duration according to the ratio of the alarm duration probability density function to the standard variance function. Whether the alarm duration in historical data has regularity on statistical sense can be determined, an alarm generation mechanism is optimally designed according to stable alarm duration statistical distribution, and interference alarm existing in an alarm system can be reduced.

Description

technical field [0001] The invention relates to the technical field of automation, in particular to a method and system for judging the stability of statistical distribution of alarm duration. Background technique [0002] The alarm system plays a vital role in ensuring the safe production and high-efficiency operation of coal-fired generating units. The existing alarm technology generally adopts an immediate processing strategy, that is, to make judgments based on experience after the alarm occurs. However, the existing alarm systems are generally The outstanding problem of "too many alarms and difficult handling" makes it impossible to find out in time that the unit's operating status deviates from the normal working range through alarms, so it is impossible to eliminate abnormal conditions and eliminate alarms in time, and because the analysis of interference alarms in the factory only comes from Workers’ experience does not rely on accurate algorithms, so it is impossibl...

AI Technical Summary

Problems solved by technology

[0002] The alarm system plays a vital role in ensuring the safe production and high-efficiency operation of coal-fired power generating units. The existing alarm technology generally adopts an immediate processing strategy, that is, to make judgments based on experience after the alarm occurs. However, the existing alarm systems generally exist The outstanding problem of "too many alarms and difficult handling" makes it impossible to find out in time through the alarm that the operating status of the unit deviates from the normal working range, so it is impossible to eliminate abnormal conditions and eliminate the alarm in time, and because the analysis of interference alarms in the factory only comes from Workers’ experience does not rely on accurate algorithms, and it is impossible to make accurate predictions on alarms, which seriously affects production efficiency and brings a large number of production safety problems and even accidents.

Therefore, aiming at the problem that there are often a large number of interference alarms in the factory alarm system, the present invention proposes a method and system for judging the stability of the statistical distribution of the alarm duration

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