System and method for optimally controlling air compressor load

Abstract

The invention discloses a system and a method for optimally controlling air compressor load and relates to the field of intelligent control on air compressors in the metallurgical and chemical industry. The system comprises a monitoring host, a signal acquisition unit, a guide vane control unit and a motor control unit, wherein the signal acquisition unit, the guide vane control unit and the motor control unit are respectively connected with the monitoring host; the signal acquisition unit monitors motor exciting current as well as the flow and pressure of the inlet and outlet of a pipe network when the air compressor operates; the monitoring host calculates the current revolving speed and output power of the motor according to field data on the basis of the characteristic curve of the air compressor device; the operation parameter of the air compressor is modified; an optimizing control order is output to the guide vane control unit and the motor control unit; and an inlet guide vane aperture and the motor exciting current are regulated to realize the purpose that the air compressor operates in a load energy-saving mode. According to the system and the method, bad influence of uncertain interference and non-linear factors on the constant-pressure speed regulation system of the air compressor can be effectively eliminated, and the control precision and dynamic quality of the system can be improved.

Description

technical field [0001] The invention relates to the technical field of intelligent control of air compressors in metallurgy and chemical industry, in particular to an air compressor load optimization control system and method. Background technique [0002] Cryogenic air separation technology is a rectification production process that liquefies air as a raw material under high pressure, and separates other gases such as oxygen and nitrogen according to the differences in gas and liquid concentrations and gas boiling points. Cryogenic air separation system consists of air purification and compression unit, condensation and rectification unit, product delivery and storage unit. The control point of the production process is to ensure the constant pressure output of the air compressor, so that the change of the air compressed logistics is consistent with the production load, which is not only beneficial to the condensation of gas and nitrogen in the upper and lower rectification...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor system stability accuracy, unsatisfactory dynamic quality and unsatisfactory control effect caused by the PID cascade control and adjustment system of the air compressor, the present invention provides an air compressor load optimization control system and method, which can effectively eliminate uncertainties. The adverse effects of interference and nonlinear factors on the constant pressure speed regulation system of air compressors can improve the control accuracy and dynamic quality of the system

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