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Fractionating tower liquid level adaptive control method in petroleum refining process

A technology of adaptive control and fractionation tower, applied in the direction of adaptive control, liquid level control, general control system, etc., can solve the problem that PID controller is difficult to meet the industrial production process, and achieve the improvement of control accuracy and stability, strong learning Ability, improve the effect of anti-interference ability

Active Publication Date: 2019-01-04
DONGHUA UNIV
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Problems solved by technology

[0002] With the continuous development of industrial technology, the production process has become more complex and compact, which means that the traditional PID controller is difficult to meet the needs of industrial production processes. In order to meet the control of complex industrial processes, the application of advanced control methods has important practical significance

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  • Fractionating tower liquid level adaptive control method in petroleum refining process
  • Fractionating tower liquid level adaptive control method in petroleum refining process
  • Fractionating tower liquid level adaptive control method in petroleum refining process

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Embodiment Construction

[0040] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0041] In actual industrial control, the FOPDT model G(s) of the fractionation column liquid level can be established as:

[0042]

[0043] Then, a method for self-adaptive control of fractionation tower liquid level in a petroleum refining process provided by the present invention comprises the following steps:

[0044] (1) Take the fractionation tower in the petroleum refining process as the controlled object, and set the...

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Abstract

The invention discloses a fractionating tower liquid level adaptive control method in a petroleum refining process. In the method, a reverse error neural network and an extreme value optimization method are adopted as adaptive tools, and the input and output quantities of an actual operation process are combined to design a predictive PI control strategy. A data acquisition device is firstly usedto collect the past input and output quantities of the system, and then an extreme value optimization algorithm is designed as a solver to adjust a neural network weight in an online mode so as to train the neural network high-efficiently and accurately. After a set error constraint is satisfied, the trained neural network weight is taken as the identification parameter of the system, a system model that is close to an actual situation is established, and finally, predictive PI control is designed to control the fractionating tower liquid level of in the petroleum refining process. By using the method, the interference of a model mismatch system can be effectively alleviated, control performance is increased, and simultaneously, the application of advanced control in industrial process control is promoted.

Description

technical field [0001] The invention relates to an adaptive control method of a fractionation tower in a petroleum refining process, belonging to the technical field of industrial automation. Background technique [0002] With the continuous development of industrial technology, the production process has become more complex and compact, which means that the traditional PID controller is difficult to meet the needs of industrial production processes. In order to meet the control of complex industrial processes, the application of advanced control methods has important practical significance. The fractionation tower is an important part of petroleum refining. Different oils will be separated in the fractionation tower due to their different boiling points for further processing. The liquid level of the fractionation tower will seriously affect the quality of oil and the safety of production. In the past, due to the constraints of hardware, cost, and implementation difficulty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04G05D9/12
CPCG05B13/027G05B13/042G05D9/12
Inventor 陆康迪周武能陈杰
Owner DONGHUA UNIV
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