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Method for monitoring periodic fluctuation of parameters

A periodic and parametric technology, applied in hardware monitoring, complex mathematical operations, data processing applications, etc., can solve problems such as poor adjustment performance of control equipment, equipment safety, system performance hazards, etc., to eliminate fatigue damage and improve safety. Effect

Pending Publication Date: 2022-04-15
朗坤智慧科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the control logic adopts the target value feedback adjustment control, that is: control command = current control feedback + (target value – actual value) x proportional coefficient, this control method is often due to inaccurate setting of the proportional coefficient, or poor adjustment performance of the control equipment, As a result, the actual value can never be close to the target value, and always fluctuates back and forth on the target value, which will cause the DCS or PLC to continuously issue control commands, resulting in periodic fluctuations in the command value, feedback value, and actual value. Serious hazards to safety and system performance

Method used

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  • Method for monitoring periodic fluctuation of parameters
  • Method for monitoring periodic fluctuation of parameters
  • Method for monitoring periodic fluctuation of parameters

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Embodiment 1

[0035] refer to Figure 1~6 , as an embodiment of the present invention, a method for monitoring periodic fluctuations of parameters is provided, including:

[0036] S1: Obtain historical data information related to the unit and perform preprocessing.

[0037] It should be noted that in this embodiment, the historical data of the control parameter p during a period of time when the unit is in normal operation is obtained through the plant-level monitoring information system (SIS system) or the data interface system of the DCS control system.

[0038] Further, the preprocessing process includes:

[0039] Convert all the time tags in the date format of the parameter p’s historical data to the timestamp format, and at the same time convert the corresponding relationship between the timestamp t and the parameter p’s data value v into the corresponding relationship between the time stamp interval Δt and the data value v, Δt1=t1-t1 , Δt2=t2-t1, Δt3=t3-t1...Δtn=tn-t1, the correspon...

Embodiment 2

[0068] This embodiment is another embodiment of the present invention. What this embodiment is different from the first embodiment is that it provides a verification test of a method for monitoring the periodic fluctuation of parameters, which is to verify the technical effect adopted in this method. , the present embodiment adopts the traditional technical solution and the method of the present invention to carry out comparative tests, and compares the test results by means of scientific demonstration, so as to verify the real effect of the method.

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Abstract

The invention discloses a method for monitoring periodic fluctuation of parameters. The method comprises the steps that historical data information related to a unit is acquired and preprocessed; performing median filtering on the preprocessed data to obtain filtered data, and performing polynomial fitting on the data to obtain a fitted curve equation; data segmentation is carried out according to the intersection condition of the fitting curve and the filtered data, and segmented data point groups are determined; if the number of the segmented data point groups is greater than or equal to a preset value, binomial fitting is carried out on the data of each point group to obtain a corresponding parabolic equation and a symmetry axis thereof; and calculating a fluctuation half cycle and a difference value between a maximum value and a minimum value according to the symmetry axis, and if the difference value is smaller than a preset value, enabling the parameter to be in a periodic fluctuation state. According to the invention, whether each parameter in the industrial control field is in a fluctuation state can be monitored in real time, an alarm can be quickly given, personnel can be reminded to eliminate defects, the risk of fatigue damage caused by long-time reciprocating adjustment of equipment is eliminated, and the safety of industrial production is improved.

Description

technical field [0001] The invention relates to the technical field of industrial parameter control optimization, in particular to a method for monitoring periodic fluctuations of parameters. Background technique [0002] Energy industries such as electric power, chemical industry, and building materials have generally realized DCS and PLC automatic control. Most of the control logic adopts the target value feedback adjustment control, that is: control command = current control feedback + (target value – actual value) x proportional coefficient, this control method is often due to inaccurate setting of the proportional coefficient, or poor adjustment performance of the control equipment, As a result, the actual value can never be close to the target value, and always fluctuates back and forth on the target value, which will cause the DCS or PLC to continuously issue control commands, resulting in periodic fluctuations in the command value, feedback value, and actual value. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/30G06F17/11G06F17/18G06Q50/04
CPCY02P90/30
Inventor 武爱斌魏小庆陈福兵赵永江
Owner 朗坤智慧科技股份有限公司