Self-adaptive pressure control algorithm of reciprocating natural gas compressor

A technology of pressure control and natural gas, which is applied in the direction of pump control, electric controller, liquid variable capacity machinery, etc., and can solve the problem that the displacement of the compressor cannot be adjusted accurately and automatically

Pending Publication Date: 2021-12-03
SINOPEC OILFIELD EQUIP CORP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an adaptive pressure control algorithm for a reciprocating natural gas compressor to solve the problem that the displacement of the compressor cannot be adjusted automatically

Method used

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  • Self-adaptive pressure control algorithm of reciprocating natural gas compressor
  • Self-adaptive pressure control algorithm of reciprocating natural gas compressor
  • Self-adaptive pressure control algorithm of reciprocating natural gas compressor

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Embodiment Construction

[0036] like Figures 1 to 6 shown, image 3 The whole algorithm sets two modes, self-tuning mode a and adjustment mode b. During the initial operation, turn switch c to the b self-tuning position, and obtain the initial value of the PID controller parameters through the parameter self-tuning module. This value can satisfy the Basic control requirements, the accuracy is slightly poor; in later use, switch the switch c to the adjustment mode position a, the PID controller will play a role, and the fuzzy control module will self-correct the PID parameters in real time to achieve the optimal control effect. The self-tuning module adopts the relay feedback tuning algorithm.

[0037] Most of the controlled systems can be equivalent to a first-order system with pure lag. By measuring the critical proportional gain Kc and oscillation period Tc of this first-order system, the parameters of the PID controller can be obtained according to the Z-N method formula. KP, Ti, Td.

[0038] ...

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Abstract

According to the self-adaptive pressure control algorithm of the reciprocating natural gas compressor, when a gas lift compressor works, gathering, transportation and pressurization of natural gas can be achieved by adopting a PID control algorithm and logical judgment on the exhaust pressure of the gas lift compressor; when the compressor goes to different well sites to work, different working condition characteristics are different, a set of PID controller parameters matched with the compressor need to be set when each well works, and the parameters capable of automatically adjusting the PID controller according to the change of the working condition characteristics of the well sites are added on the basis of the conventional PID controller parameters, the parameters are always in an intelligent control algorithm in an optimal state;online parameter self-correction of the PID controller is achieved through the fuzzy control technology, the performance of the controller is improved, and accurate automatic adjustment of the pressure of the compressor is achieved.

Description

technical field [0001] The invention relates to the field of natural gas compressor pressure control, in particular to an adaptive pressure control algorithm of a reciprocating natural gas compressor. Background technique [0002] At present, most natural gas compressors in China are mainly used in the gathering, transportation and pressurization of natural gas. The working conditions of these occasions are stable and the process requirements are relatively simple. The control of the compressor is generally a basic sequential logic control ( figure 1 ). [0003] When natural gas compressors are used in gas lift drainage operations, the selection of compressor intake gas sources varies according to the actual situation of different well sites, including: gas production from adjacent wells, external pipeline gas, self-produced gas, etc. The gas injection pressure (that is, the compressor discharge pressure) required by the oil and gas industry standard "Gas Lift Drainage Gas...

Claims

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Application Information

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IPC IPC(8): G05B11/42F04B49/06F04B49/08
CPCG05B11/42F04B49/06F04B49/08
Inventor 刘辉侯小兵黄远明
Owner SINOPEC OILFIELD EQUIP CORP
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