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Method for preventing DCS misoperation

A technology of misoperation and amplitude range, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve problems such as system safety hazards, large system overshoot, system shutdown, etc., to achieve good adjustment performance and ensure safety , adjust the effect of stability

Inactive Publication Date: 2011-06-01
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, within the range of output high and low limits, there is no limit to one-time modification of the given range, so in many cases, due to operator carelessness, one-time modification of the given range is too large, which will bring a large overshoot to the system , thus bringing great danger to the system safety, causing the system to shut down in the slightest, and causing safety accidents in the severe case

Method used

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  • Method for preventing DCS misoperation
  • Method for preventing DCS misoperation
  • Method for preventing DCS misoperation

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] In DCS (distributed control system), the operator controls the valve opening of the regulating valve by modifying the given MV value (loop output value) once. In order to improve the reliability of DCS and avoid misoperation, the present invention gives Intelligently judge the magnitude of the MV value, that is, intelligently judge the valve opening to prevent DCS misoperation.

[0016] Such as figure 1 As shown, the limited operating range of the MV value that controls the opening of the regulating valve includes the boundary value MH of the upper and lower bounds of the solid line k 、ML k , boundary value MH k 、ML k It can be dynamically modified according to the control parameters of the process system, such as process reference parameter A. MH from boundary value k 、ML k The dotted lines on the upper and lower edges of , are the sys...

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Abstract

The invention relates to a method for preventing distributed control system misoperation. The method comprises the following steps: firstly, boundary values--MHk and MLk and limit values--MH and ML are calculated by adopting regressing calculation method: before a limit switch is input, the range values of an initial setting upper limit and an initial setting lower limit in DCS parameters; a modified set value (MV value) is determined whether in a limited range; thirdly, an enumerator is determined whether equal to a set enumerated data, namely whether reaches the time of modified time delay;fourthly, modified boundary values-MHk and MLk are determined. Because advanced controlling, intelligent operation determining and misoperation Intercept warning cueing system is adopted, most of misoperation of an operator is halted, the production safety is guaranteed, and the long production cycle can improve the economic benefit of the enterprise. The method can be widely applied to the petrochemical production.

Description

technical field [0001] The present invention relates to a distributed control system (DCS) operating method, in particular to a method in the field of advanced control (APC) intelligent configuration technology to prevent collection and distribution by modifying the MV value (loop output value) of the control valve opening. A method of controlling the misoperation of the system. Background technique [0002] In chemical production, DCS is widely used for automatic control of production process. In the DCS system, when the operator modifies the MV value of the primary circuit DCS, since the MV value linearly controls the valve opening of the regulating valve, the DCS system will not do anything if the MV value does not exceed the upper and lower bounds. Judgment and execution (such as image 3 shown). The existing technology is the control method used by Yuntianhua Company to use the high and low output limits to limit the card edge, so that the operation will not exceed th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 王慧
Owner CHINA NAT OFFSHORE OIL CORP