Air compressor control method and system

Abstract

The invention discloses an air compressor control method used for restarting of an air compressor and a motor after an air compressor control system is in failure. The air compressor control system comprises the air compressor connected with the motor and a decentralized control system connected with the air compressor; the air compressor control method comprises the following steps: using a motor re-starter to judge whether an air compressor control system failure is a low-voltage trip failure or not; if the air compressor control system failure is the low-voltage trip failure, carrying out failure resetting on the air compressor control system failure; restarting the air compressor and the motor; if the air compressor control system failure is not the low-voltage trip failure, enabling a breaker contact of the air compressor not to act. According to the invention, whether the failure is the low-voltage trip failure or not is judged, if yes, failure resetting is carried out and the air compressor and the motor are restarted, so that continuity of a production process is ensured. Otherwise, the breaker contact of the air compressor does not act, so that wrong starting of the equipment under the circumstance of mechanical failure overload or short circuit is avoided and personal safety and equipment safety are ensured.

Description

technical field [0001] The invention relates to the technical field of air compressor control, in particular to an air compressor control method and system. Background technique [0002] Air compressor is the basic product of industrial modernization, its function is to provide air source power. The air compressor is the main body of the electromechanical bleed air source device of the core equipment of the pneumatic system, which can convert the mechanical energy of the prime mover (usually a motor) into gas pressure energy, and is a pressure generating device for compressing air. [0003] In order to ensure equipment and personal safety, air compressors are generally equipped with various protection functions such as temperature start protection, oil pressure difference protection, suction pressure protection, exhaust pressure difference protection, and motor loss of pressure protection. If any of the above items fails, the air compressor control system will issue a trip ...

AI Technical Summary

Problems solved by technology

When the power grid flickers, the air compressor will trip at low voltage. According to the various protection configurations of the high-voltage power supply system, the recovery time of the system voltage will generally not exceed 1s (the protection time is set to 610ms). Return to normal, but the air compressor must be fault reset before it can be turned on. Before the reset, the control panel will display the corresponding fault type. However, according to the existing DCS system to reset the air compressor, there is only one collective fault output port for various faults , the type of fault cannot be displayed. Since multiple faults of the air compressor share a remote output point, no matter what the fault is, only the same alarm will be generated, and the fault type will not be displayed. If the device itself is faulty and it is directly reset and started remotely, it may cause safety Accidents, which exposed the defects in the cooperation between the air compressor and the DCS system, failed to achieve the purpose of quick and successful startup, and may cause personal and equipment safety accidents

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