A generalized predictive control system and method for air compressor anti-surge

Abstract

An air compressor anti-surge generalized predictive control system and method relate to the field of anti-surge predictive control of air compressor control systems in the steel and chemical industries. The system includes a forward collector, a predictor and a backward actuator. The forward collector monitors the inlet and outlet pressure and flow of the pipe network, and is connected to the predictor in the form of PCI bus; the backward actuator controls the vent valve, has the function of sound and light alarm, and is connected to the predictor in the form of RS485; the predictor The controller adopts the air compressor anti-surge generalized predictive control method, combines the production load setting information input by the keyboard and the on-site operation data obtained by the forward collector, calculates, displays and stores the air compressor operating parameters, and uses the RS485 method to backward The actuator outputs predictive control information to realize predictive control of air compressor anti-surge. The system adjustment process of the invention is gentle, the control precision and dynamic quality are high, the operation is stable and reliable, and the surge phenomenon of the air compressor can be effectively prevented.

Description

technical field [0001] The invention relates to the anti-surge predictive control field of an air compressor control system in the iron and steel and chemical industries, in particular to an air compressor anti-surge generalized predictive control system and method. Background technique [0002] The prediction and prevention of air compressor surge phenomenon is a research hotspot in the field of air compressor control. The most fundamental problem in predicting and preventing the occurrence of surge phenomenon is how to establish a practical and effective air compressor dynamic model. At present, most of the research methods on this problem focus on the linear time-invariant process, and the data collected on site, such as the exhaust volume, pressure, and flow rate of the pipeline network, are expressed as independent time series to realize the smooth process of the linear time-invariant function. However, the actual air compressor operation process has a certain degree o...

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Problems solved by technology

[0004] In order to solve the problem that the actual working point of the air compressor moves into the critical control area or dangerous surge area caused by factors such as production load adjustment, pipe network leakage, and grid harmonic disturbance, the invention provides an air compressor anti-surge A vibration generalized predictive control system and method, the system performs generalized prediction and control on whether the operating point of the air compressor enters the surge region based on the flow rate change rate

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