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A method for self-adaptive control of fractionation tower liquid level in petroleum refining process

A self-adaptive control and fractionation tower technology, applied in the direction of self-adaptive control, liquid level control, general control system, etc., can solve the problem that the PID controller is difficult to meet the industrial production process, etc., to improve the control accuracy and stability, and improve the resistance. Effects of Interference Ability

Active Publication Date: 2021-08-27
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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  • A method for self-adaptive control of fractionation tower liquid level in petroleum refining process
  • A method for self-adaptive control of fractionation tower liquid level in petroleum refining process
  • A method for self-adaptive control of fractionation tower liquid level 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 an adaptive control method for the liquid level of a fractionation tower in the petroleum refining process. In this method, the reverse error neural network and extreme value optimization method are used as adaptive tools, and the predictive PI control strategy is designed in combination with the input and output of the actual operation process. The present invention first uses the data acquisition device to collect the past input and output of the system, and then designs an extreme value optimization algorithm as a solver to adjust the weight of the neural network online, thereby efficiently and accurately training the neural network; after satisfying the set error constraints, The trained neural network weight is used as the identification parameter of the system, and a system model close to the actual situation is established. Finally, the predictive PI control is designed to control the liquid level of the fractionation tower in the process of petroleum refining. By adopting the method of the invention, the interference of model mismatch to the system can be effectively relieved, the control performance is improved, and the application of advanced control in industrial process control is also 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...

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Application Information

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Patent Type & Authority Patents(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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