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Air Compressor Station Predictive Adjustment Control Method

A technology of pressure regulation control and predictive control, which is applied in the direction of pump control, electric fluid pressure control, and electrical program control, etc. The effect of unloading operation, avoiding pipeline venting operation, and pressure balance adjustment

Inactive Publication Date: 2012-02-22
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The second is the overpressure interlock start-stop electrical control technology of the air compressor. This technology will cause frequent start-stop of the motor when the load changes greatly and the capacity of the air storage tank is small.
However, the pressure of the patented air supply main pipe cannot be adjusted according to user needs during operation

Method used

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  • Air Compressor Station Predictive Adjustment Control Method
  • Air Compressor Station Predictive Adjustment Control Method
  • Air Compressor Station Predictive Adjustment Control Method

Examples

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Effect test

Embodiment

[0060] For an air compressor station with 4 air compressors, after starting, the motor current is 100% of the rated current, the opening of the vent valve is 0%, and the flow rate is 100% of the rated flow rate. No. 1 to No. 4 air compressors are all loaded state, the given value of pipe network pressure is 0.7MPa. According to the calculation, the given values ​​of the frequency converters of the four air compressors are (100%, 100%, 100%, 100%). When the pressure of the pipe network is greater than 0.7MPa, the motor current of the air compressor is 20% of the rated current , the flow rate is 15% of the rated output flow rate, the air compressor enters the critical unloading state, the given value obtained by calculation is (0%, 100%, 100%, 80%), and the No. 1 air compressor is automatically in the standby state. No. 4 air compressor is in the 80% load state, and the constant pressure control is realized through pressure regulation.

[0061] When the given value of the pipe ...

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Abstract

The invention discloses a predictive pressure regulation control method of an air compressor station. Firstly, each air compressor is started according to the given initial air supply pressure of the air compressor station to put the air compressors into operation. The given initial pressure setting is between loading and The intermediate value between the unloading pressure; second, the given value given by the rolling optimization calculation model makes each air compressor in a loaded state, and finally the system reaches equilibrium; third, according to the real-time information collected by the data acquisition system, when When the actual pressure of the gas supply pipeline network is greater than or less than the predicted given value and meets the unloading or loading conditions, the predictive controller gives a new given value through optimization calculation, self-adaptive learning mode and judgment of constraint conditions, and adjusts the output through PID as The setting of the frequency converter controls the gas production of the air compressor to adjust the pressure of the pipe network and achieve a new balance. The invention can ensure the stability of the air supply system, and can also adjust the air supply pressure with the change of the user's air load, so as to realize the pressure balance adjustment of the pipe network of the air compressor station.

Description

technical field [0001] The invention relates to the automatic control technology of an air compressor station. Background technique [0002] In the actual operation of the air compressor station, when the air compressor is running at low load and the pressure in the air storage tank rises to the set pressure, it is necessary to adjust the pressure of the pipe network. There are three most widely used technologies: [0003] The first is the automatic unloading technology of the air compressor, which automatically separates the main motor of the air compressor from the compression part, so the air compressor does not generate compressed gas at this time, and the motor is running at no load, and its power consumption is about the rated operation of the motor About 10%, this part of the electric energy is actually consumed for free. [0004] The second is the overpressure interlock start-stop electrical control technology of the air compressor. This technology will cause freque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/20F04B49/06G05B19/04
Inventor 李桂红江浩杰尤超何焱彬李鹏
Owner BAOSHAN IRON & STEEL CO LTD
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