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Anti surge control method and device

A control method and anti-surge technology, applied in pump control, components of pumping devices for elastic fluids, non-variable-capacity pumps, etc., can solve the parameter deviation of surge line, working point disturbance, and control misjudgment And other issues

Active Publication Date: 2015-04-22
SHENYANG BLOWER WORKS GRP AUTOMATIC CONTROL SYST ENG
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an anti-surge control method and device, which solves the technical problem in the prior art that the disturbance of the operating point causes the deviation of the parameters of the surge line, thereby causing misjudgment of control and increasing the risk of surge occurrence

Method used

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Embodiment Construction

[0026] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 2 The schematic diagram of the application scene of the air compression equipment provided by the embodiment of the present invention, the centrifugal compressor compresses the air, the anti-surge controller can be realized by PLC (programmable logic controller) and its peripheral equipment, the anti-surge controller The input is the air inlet pressure Ps, the air inlet flow rate Q, and the air outlet pressure Pd, and the output of the anti-surge controller is the value of the anti-surge control output MV (such as the opening degree of the bypass purge valve). The following takes the working process of the anti-surge controller as an example to introduce an anti-surge control method provided by the embodimen...

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Abstract

The invention discloses an anti surge control method and device. An outlet pressure value, an inlet pressure value and an inlet flow rate are obtained; a coordinate of a working point is calculated according to the outlet pressure value, the inlet pressure value and the inlet flow rate; when a deviation of the working point coordinate occurs, and a differential of a working point offset to time is calculated ; according to the differential of a working point offset to time, the deviation of an anti surge control line is calculated and the position of the anti surge control line is revised; according to the revised surge control line, whether the working point is in a surge area is judged; when the working point is in the surge area, an anti surge control signal is output for conducting an anti surge control. The embodiment of the invention references a differential response processing method, successfully solves the problem of the working point disturbance and reduces the probability and risk of misjudgment.

Description

technical field [0001] The invention relates to the technical field of industrial automatic control, in particular to an anti-surge control method and device. Background technique [0002] Surge is an unstable operating condition that causes abnormal performance of centrifugal compression equipment. When the centrifugal compression equipment sends a surge, the airflow period of the entire fan pipe network system will fluctuate periodically, and the vibration of the entire unit will be greatly aggravated. In severe cases, the pressure imbalance will cause strong vibration, which will damage the seal and bearing. [0003] The surge process that may occur during the operation of centrifugal compression equipment is: when the flow rate decreases to the minimum, the outlet pressure will suddenly drop, and the characteristic curve of centrifugal compression equipment is as follows: figure 1 As shown, each fixed speed corresponds to a static characteristic curve of air volume-inl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00F04D29/66
CPCF04D27/02F04D29/668
Inventor 费启智李学青田盛倪振宇迟广海
Owner SHENYANG BLOWER WORKS GRP AUTOMATIC CONTROL SYST ENG
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