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Hydrogen peroxide device alarm system alarm threshold optimization method

A threshold optimization and alarm system technology, applied in complex mathematical operations, etc., can solve problems such as missed alarms, achieve alarm threshold optimization, improve alarm efficiency, and avoid false alarms and missed alarms

Pending Publication Date: 2019-12-31
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] Aiming at the serious problem of alarm leakage in the existing hydrogen peroxide device alarm system, the present invention provides a method for optimizing the alarm threshold of the hydrogen peroxide device alarm system

Method used

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  • Hydrogen peroxide device alarm system alarm threshold optimization method
  • Hydrogen peroxide device alarm system alarm threshold optimization method
  • Hydrogen peroxide device alarm system alarm threshold optimization method

Examples

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Embodiment 1

[0063] Collect historical alarm data of the DCS system of the hydrogen peroxide device through the OPC communication protocol, an example of the compression and separation section in production, select 8 variables from the alarm system as the research object, take the normal data as the normal working condition, and the alarm data as the abnormal working condition A week's worth of data is collected with a sampling time of 3 minutes. During the one-week operation, 3339 normal data and 1439 alarm data were generated. Fit the probability density curves of the variable FI1208 in the two states respectively, such as image 3 shown.

[0064] The expressions of the probability density function of the variable FI1208 under normal and abnormal conditions are respectively:

[0065]

[0066]

[0067] Substitute Equation (4) and Equation (5) into the objective function (3), search the objective function in the interval [28,34], and obtain the optimal threshold x after 4 iteration...

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Abstract

The invention provides a hydrogen peroxide device alarm system alarm threshold optimization method, and belongs to the field of hydrogen peroxide device alarm system alarm threshold optimization. Themethod includes: collecting process historical data of the hydrogen peroxide device; analyzing the operation trend of the alarm parameters by using a statistical method; fitting a probability densityfunction of the variables under normal conditions and abnormal conditions from massive historical data, establishing an optimization objective function about a missing report rate and a false alarm rate, performing threshold optimization on the variables by utilizing a threshold optimization algorithm to obtain an optimal threshold, and calculating the optimization objective function, the false alarm rate and the missing report rate. According to the method, the false alarm rate and the missing alarm rate are comprehensively considered, the alarm threshold of the hydrogen peroxide device alarmsystem is optimized, the alarm efficiency of the hydrogen peroxide device alarm system is improved, and false alarm and missing alarm are avoided.

Description

technical field [0001] The invention relates to the field of alarm threshold optimization of an alarm system of a hydrogen peroxide device, in particular to a method for optimizing the alarm threshold of an alarm system of a hydrogen peroxide device. Background technique [0002] The alarm system of the hydrogen peroxide device can send out an alarm during the production process of hydrogen peroxide. Its purpose is to prompt the operator to respond to equipment failures, process deviations or abnormal conditions, so as to avoid large fluctuations or safety accidents in the production process and ensure the safety of the device. Safe and stable operation. Therefore, efficient, accurate and timely alarm is very important to improve the safe production and operation of the factory. [0003] A large number of invalid alarms (most of which are false alarms) due to the unreasonable setting of the parameter alarm threshold is a major problem in the current alarm system of the hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18
Inventor 王春利李传坤高新江韩华伟
Owner CHINA PETROLEUM & CHEM CORP
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