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Memory, safety instrument system SIL verification method, system and device

A technology for safety instrumented systems and verification methods, which is applied in the field of memory and SIL verification of safety instrumented systems, and can solve problems such as large deviations in calculation results

Pending Publication Date: 2021-10-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In its modeling calculation, the calculation results of SIF (safety instrumented function) loops with redundant structures such as 1oo2 and 2oo3 have large deviations

Method used

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  • Memory, safety instrument system SIL verification method, system and device
  • Memory, safety instrument system SIL verification method, system and device
  • Memory, safety instrument system SIL verification method, system and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In order to improve the accuracy of SIF loop calculation results in the modeling calculation process of safety instrumented system SIL verification, such as figure 1 As shown, a safety instrumented system SIL verification method is provided in an embodiment of the present invention, comprising steps:

[0061] S11. Setting the SIF circuit subdivision used to construct the reliability block diagram to include a sensing unit, a logic controller unit and an execution unit;

[0062] In the embodiment of the present invention, the SIF loop is divided into three units: a sensing unit, a logic controller unit and an execution unit; then, a corresponding reliability block diagram can be constructed according to the structure of each unit. In practical applications, the three units can be connected in series; if there is one or more paths from one end point (such as the left end point) of the SIF circuit to the other end point (such as the right end point), the SIF is considered ...

Embodiment 2

[0127] On the other side of the embodiment of the present invention, a safety instrumented system SIL verification device is also provided, figure 2 A schematic structural diagram of a safety instrumented system SIL verification device provided by an embodiment of the present invention is shown, and the safety instrumented system SIL verification device is a figure 1 The device corresponding to the SIL verification method of the safety instrumented system in the corresponding embodiment, that is, implemented in the form of a virtual device figure 1 In the corresponding embodiment of the safety instrumented system SIL verification method, each virtual module constituting the safety instrumented system SIL verification device can be executed by electronic equipment, such as network equipment, terminal equipment, or server. Specifically, the safety instrumented system SIL verification device in the embodiment of the present invention includes:

[0128] The logical division modu...

Embodiment 3

[0133] On the basis of Embodiment 2, the modeling calculation module 03 in the embodiment of the present invention further includes:

[0134] For dangerous failures that cannot be detected by regular inspection, the common cause failure of the undetectable dangerous failure part of the component is calculated according to the overhaul cycle or offline inspection cycle of the component and its corresponding inspection and test coverage.

[0135] Similarly, the working principles and beneficial effects of the safety instrumented system SIL verification device in the embodiment of the present invention have also been figure 1 The corresponding safety instrumented system SIL verification methods are also recorded and explained, so they can be referred to each other, and will not be repeated here.

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Abstract

The invention discloses a memory, and a safety instrument system SIL verification method, system and device. The method comprises the following steps: setting a safety instrument function SIF loop used for constructing a reliability block diagram into a sensing unit, a logic controller unit and an execution unit; according to the failure data of each element in the SIF loop, respectively calculating a safety failure fraction SFF and a maximum fault margin HFT of each unit, and obtaining a structure constraint level of the SIF loop; and when the three units are respectively subjected to modeling calculation, calculating the common cause failure of the undetectable dangerous failure part of the element according to the regular detection time interval of the element and the corresponding PTC (Positive Temperature Coefficient) of the element. When the common cause failure of the undetectable dangerous failure part is calculated, compared with the prior art in which the influence caused by the change of the test period is not considered, the method can effectively improve the accuracy of the result of calculating the average failure probability by the SIF loop.

Description

technical field [0001] The invention relates to the field of process industry safety, in particular to a storage device and a safety instrument system SIL verification method, system and device. Background technique [0002] Process industries such as the petrochemical industry often involve a large amount of flammable, explosive, toxic or highly corrosive hazardous chemicals during their production, storage and transportation, so there are many risks of safety accidents. [0003] Safety instrumentation system (Safety instrumentation System, SIS) is an automatic safety protection system; as an important protection layer in the process industry, safety instrumentation system is also the last preventive protection measure before a safety accident occurs; therefore, the design reliability meets the required safety Instrumentation system is of great significance to prevent accidents in process industry and reduce the overall risk level of production equipment. [0004] Commonly...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F111/04G06F119/02
CPCG06F30/20G06F2111/04G06F2119/02
Inventor 姜雪胡川赵振峰
Owner CHINA PETROLEUM & CHEM CORP
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