Air compressor group control system and control method thereof

Abstract

The invention relates to the field of air compressor control, and aims at providing an air compressor group control system and a control method thereof. According to the air compressor group control system and the control method thereof, a human-machine interface, a PLC operation control unit, a frequency conversion adjusting air compressor, a power frequency air compressor set, a pressure sensor, a paperless recorder and an air storage tank are included. The power frequency air compressor set is formed by connecting one or more power frequency air compressors in series. The human-machine interface is electrically connected with the PLC operation control unit. The PLC operation control unit is electrically connected with the frequency conversion adjusting air compressor and the power frequency air compressor set. The air compressor group control system and the control method thereof have the beneficial effects that the output power of an air compressor group can be controlled and adjusted at will, power waste is avoided, frequent motor starting is avoided, and electric energy losses and impacts on a power grid are reduced; and the loading situation of the compressors can be adjusted within the pressure range through the system, the machine loading rate can reach 95%, and the effects of constant-pressure air supply and electric energy saving are achieved.

Description

technical field [0001] The invention relates to the field of air compressor control, in particular to an air compressor group control system and a control method thereof. Background technique [0002] Usually the air compressor station is composed of multiple air compressors, and each air compressor is driven by a motor and controlled independently. In actual work, the air compressor station is designed according to the maximum working load, so when the gas consumption is small, start 1-2 units, and when the gas consumption is large, start multiple units to run in parallel. It will automatically load and unload according to the lower limit and upper limit of the preset pressure value to meet the gas consumption. This control method of the air compressor station brings many problems. For example: the supply and demand relationship of screw air compressor air volume is mainly manifested in the change of exhaust pressure. When the exhaust volume just meets the requirements of...

AI Technical Summary

Problems solved by technology

In order to meet the gas requirements of production equipment, the operating pressure of the air in the air storage tank is usually set at 1.05-1.2MPa. If the pressure setting range is too large, it will cause high pressure in the pipeline, high transmission loss, air leakage, and large-scale fluctuations in air pressure. Meet the needs of modern production technology

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