Gas fractionation device control system performance evaluation method based on PCA (Principle Component Analysis)-LSSVM (Least Squares Support Vector Machine)

A system performance evaluation and device control technology, which is applied in the performance evaluation of multivariable control systems of gas fractionation devices and the performance evaluation of control systems of gas fractionation devices in oil refineries, can solve problems such as the inability to provide performance index values, and reduce computational complexity. , Improve the speed of evaluation and the effect of accurate evaluation results

Active Publication Date: 2015-08-26
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Problems solved by technology

Someone proposed a practical suboptimal multi-variable MVC control benchmark, which is a natural extension of the SISO system performance evaluation technology. It only needs the order of the correlation matrix and does not need to construct a correlation matrix. It is simpler and more practical than the general MVC benchmark method, but Can not give accurate performance index value

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  • Gas fractionation device control system performance evaluation method based on PCA (Principle Component Analysis)-LSSVM (Least Squares Support Vector Machine)
  • Gas fractionation device control system performance evaluation method based on PCA (Principle Component Analysis)-LSSVM (Least Squares Support Vector Machine)
  • Gas fractionation device control system performance evaluation method based on PCA (Principle Component Analysis)-LSSVM (Least Squares Support Vector Machine)

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the examples.

[0050] The invention provides a PCA-LSSVM technology gas separation device multivariable control system performance evaluation method, such as Figure 1-2 Shown:

[0051] Understand the industrial process of the gas separation plant, find the main control loops of the system, analyze these process control loops, analyze the structure and characteristics of the controller, understand the historical best state of the loop, and need to ensure that these loops are stable and safe under the current working conditions The operation provides a strong guarantee for the optimal performance of the calculation.

[0052]The on-site real-time data generated during the operation of the industrial production process of the gas separation device is collected to the central control room through the distributed control system (DCS for short). The deviation value from the on-site real-tim...

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Abstract

The invention relates to a gas fractionation device control system performance evaluation method based on PCA (Principle Component Analysis)-LSSVM (Least Squares Support Vector Machine), which comprises the following steps: a PCA method is adopted for carrying out dimension reduction processing on data; acquired main component values are trained via the LSSVM, and a model is built; and a performance index value calculated through the obtained model serves as an evaluation result. The PCA-LSSVM method is used for building the system model, the model is used for control system performance evaluation, a correlation matrix of the control system does not need to be obtained, computation complexity is reduced, and the evaluation speed is enhanced.

Description

technical field [0001] The invention relates to performance evaluation of a control system of a gas fractionation device in an oil refinery, in particular to a performance evaluation method for a multivariable control system of a gas fractionation device, and belongs to the field of performance evaluation of a control system. Background technique [0002] The main task of the refinery gas fractionation unit is to separate various components in liquefied petroleum gas and provide raw materials for subsequent gas deep processing units. The gas fractionation device is a rectification tower system composed of multiple rectification towers. Using the different boiling points and saturated vapor pressures of the components in the liquefied petroleum gas, the separation of the components is realized by the multi-element rectification method, so as to provide the next step for the device. Provide raw materials. [0003] The gas fractionation device contains many control loops. It i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0243
Inventor 苏成利蔡宏斌李平安德亮邱梦婵林晓华
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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