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Dynamic matrix control optimized pressure control method for oil-gas-water horizontal three-phase separator

A technology of dynamic matrix control and three-phase separator, applied in the field of automation, can solve problems such as large overshoot and oscillation, hidden dangers of production safety, PID difficult to meet control requirements, etc.

Active Publication Date: 2016-09-14
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for integral, oscillating or unstable control objects, PID is sometimes difficult to meet higher control requirements
For example, large overshoot and oscillation often occur during step input, which may bring safety hazards to production

Method used

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  • Dynamic matrix control optimized pressure control method for oil-gas-water horizontal three-phase separator
  • Dynamic matrix control optimized pressure control method for oil-gas-water horizontal three-phase separator
  • Dynamic matrix control optimized pressure control method for oil-gas-water horizontal three-phase separator

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Experimental program
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Effect test

Embodiment Construction

[0067] Take the process control of the internal pressure of the oil-gas-water horizontal three-phase separator as an example:

[0068] The control of the internal pressure of the oil-gas-water horizontal three-phase separator is a lag process, and the adjustment means is to control the opening of the exhaust valve in the settling chamber.

[0069] Step (1). Establish the model of the controlled object by the real-time step response data of the pressure object in the oil-gas-water horizontal three-phase separator, the specific method is:

[0070] a. Give a step input signal to the oil-gas-water horizontal three-phase separator, and record its step response curve.

[0071] b. Filter the corresponding step response curve, and then fit it into a smooth curve, record the step response data corresponding to each sampling time on the smooth curve, the first sampling time is T s , the time interval between two adjacent sampling moments is T s , the order of sampling time is T s , 2...

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Abstract

The invention discloses an oil-gas-water horizontal type three-phase separator pressure control method optimized through dynamic matrix control. The method comprises the steps that firstly, the model of a pressure object in an oil-gas-water horizontal type three-phase separator is built based on the step response data of the pressure object in the oil-gas-water horizontal type three-phase separator, and basic object characters are excavated out; then, the parameters of a corresponding PI-PD controller are set according to the character of the dynamic matrix control; finally, PI-PD control is carried out on the pressure object in the oil-gas-water horizontal type three-phase separator. The good control performance of the PI-PD control and the good control performance of the dynamic matrix control are combined, and the defects of a traditional control method are effectively overcome.

Description

technical field [0001] The invention belongs to the technical field of automation, and relates to a dynamic matrix control (DMC) optimization-based proportional-integral-proportional-derivative (PI-PD) control method for internal pressure of an oil-gas-water horizontal three-phase separator. Background technique [0002] PID controller is simple in structure and convenient in control, and is widely used in various industrial control systems. However, for integral, oscillating or unstable control objects, PID is sometimes difficult to meet higher control requirements. For example, when the step is input, it often produces large overshoot and oscillation, which may bring safety hazards to production. At present, the pressure control of oil-gas-water horizontal three-phase separator mostly adopts PID control. If PD control can be added to the inner loop to suppress its overshoot first, and PI control is used for the outer loop, better production performance will be obtained. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/20G05B13/04
Inventor 薛安克李海生张日东王俊宏王建中
Owner HANGZHOU DIANZI UNIV