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Minimum variance based performance evaluation method and system of control loop

A control loop and minimum variance technology, applied in electrical testing/monitoring, etc., to achieve the effect of reducing labor intensity and improving operation and management efficiency

Active Publication Date: 2017-08-22
江苏知聚知识产权服务有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Faced with so many control loops and valve equipment, it is a huge challenge for the station management and maintenance personnel of natural gas operation enterprises

Method used

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  • Minimum variance based performance evaluation method and system of control loop
  • Minimum variance based performance evaluation method and system of control loop
  • Minimum variance based performance evaluation method and system of control loop

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Embodiment Construction

[0049] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0050] like figure 1 As shown, the present invention provides a method for evaluating the performance of a control loop based on minimum variance, and the method includes the following steps:

[0051] collecting natural gas pipeline pressure control loop data, the control loop data including natural gas pipeline inlet and outlet natural gas pressure parameters;

[0052] Analyze the collected control loop data, and establish the input and output model of the inlet and outlet pressure;

[0053] Using the natural gas pressure data imported by the natural gas pipeline as input, the predicted output value is obtained through the input-output model;

[0054] The error is obtained by comparing the predicted output value with the actually collected natural gas pressure data at the outlet of the natural gas pipeli...

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Abstract

The invention relates to a minimum variance based performance evaluation method and system of a control loop. The method comprises that data, including natural gas pressure parameters of an inlet and an outlet, of a natural gas line pressure control circuit is collected; an input-output model of the inlet and output pressure is established; natural gas pressure data of the inlet of the natural gas line serves as input, and a predicted output value is obtained via the input-output model; and the predicted output value is compared with the practically collected natural gas pressure data of the outlet of the natural gas line to obtain an error, and the performance of the control loop is evaluated on the basis of a minimum variance algorithm. Via the method and device, management staff is prompted automatically and timely when the performance of the pressure control loop tends to be decrease or an electric regulating valve has a fault, so that the labor intensity is reduced greatly, the operation and management efficiency is improved, and too wide pressure fluctuation and production accidents of sub natural gas distributing states can be avoided or reduced.

Description

technical field [0001] The present invention relates to the technical field of natural gas pipeline transportation, in particular to the technical field of control loop performance evaluation, in particular to a minimum variance-based control loop performance evaluation method and system for natural gas distribution stations. Background technique [0002] As a high-quality, efficient and clean energy, natural gas has developed into one of the world's three major energy sources. Natural gas is transported by pipeline to provide downstream users with stable pressure, safe and reliable natural gas. Natural gas from long-distance pipelines enters the urban pipeline network through high- and high-pressure, medium- and high-pressure stations. The natural gas distribution station is a station set up along the gas pipeline to distribute gas to users. In order to ensure that high-pressure natural gas enters the downstream pipeline safely and maintain continuous gas supply, the distr...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/02
Inventor 吴平陈亮潘海鹏段怡雍
Owner 江苏知聚知识产权服务有限公司
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