1Current operation status of air compressor station

2Principle of centralized control system for air compressor

The centralized control system for air compressors includes the XBZD-KYQ air compressor group control energy-saving main cabinet, XBQ-KY series air compressor group control variable frequency energy-saving cabinet, remote control module, office PC, and industrial control software system. The intelligent group control energy-saving main cabinet consists of PLC, touch screen, pressure transmitter, and communication module. Through RS485 communication network, each air compressor, frequency converter, refrigerated dryer or other accessory equipment is grouped into a control network, which can automatically control the start and stop of the air compressors in the group network according to the gas supply pressure. At the same time, it can also transmit operational data to office computers for convenient device control and management.

3Functions of centralized control system for air compressor

1. Energy saving cloud computing
The intelligent group control system simulates and calculates data collected within the network to achieve optimal energy-saving optimization of the system.
2. Unified linkage control
The intelligent group control system can control and monitor compressors through CAN, Modbus, or Ethernet connections. Up to 38 devices can be connected and controlled to form a group control network.
3. Remote monitoring
The intelligent group control system can be remotely operated through RS485 or Ethernet connection to the terminal.
4. Constant pressure gas supply
The system can adjust the loading/unloading of the compressor within a narrow user-defined pressure range, keeping the pressure within a certain range of the pressure band and achieving the goal of constant pressure gas supply.
5. System pressure setting value management
It is possible to define pressure bands and set points for different groups.
6. Main operation and rotation operation rules
The main and backup operating units can be set up, and when there are multiple compressors and dryers, the compressors and dryers can be switched to operate alternately.
7. Timed operation control
When the compressed air pipeline network requires regular gas supply and stopping gas supply, it meets different combination requirements.
8. Frequency conversion intelligent system assistance
Single frequency conversion transformation combined with intelligent group control system achieves optimal energy-saving operation.

4Operation interface of centralized control system for air compressor

5Characteristics of centralized control system for air compressor

1. Energy saving operation
By simulating the data collected within the network, the system achieves optimal energy-saving optimization.
2. System linkage control
The on-site control system controls and monitors the compressor through CAN, Modbus or Ethernet connections, and can also connect supporting equipment such as dryers, cooling water pumps, cooling towers, etc. according to system needs. It can connect and control up to 38 devices to form a group control network.
3. Remote monitoring
The intelligent group control system is connected to remote control terminals through RS485 or Ethernet. The on-site control system will monitor all measured and calculated machine data, air network data, and connected analog inputs, and upload all data to any set monitoring PC.
4. Constant pressure gas supply
The on-site control system can adjust the loading/unloading of the compressor within a narrow user-defined pressure range, keeping the pressure within the pressure range, achieving the goal of constant pressure gas supply, and minimizing the impact of switches on pressure.
5. System warning
The remote monitoring system can timely understand the operation status of the air compressor through synchronous communication data, and achieve online management of various alarm data in the system. It can timely alarm and process various alarm data to avoid operational accidents caused by management negligence.
6. Operating rules
It is possible to set up main and backup operating units. When there are multiple compressors and dryers, they can be set to switch between operation in turn. When the compressed air pipeline network requires regular gas supply and stops, different combination requirements can be met.