VOZDUH

Automatic control systems for radial flow compressor

Purpose

Automatic or manual control for radial flow compressor RTKV-350-5.

Basic functions

• the controller"s connection to the sensors and to the main mechanisms of the compressor through the spark proof barriers.
  
• automatic control of the startup, shutdown and of the work of the compressor
  
• keeping the oil-level in the oil-system.
  
• control of the main engine"s parameters.
  
• compressor"s bearings.
  
• temperature control.
  
• control of the axial shift of the compressor"s rotor.
  
• supply system control.
  
• sensors control. In case the leading sensor breaks down the system switches to the dubbing sensor for each of the controlled parameters.
  
• control of the main and dubbing sensors separation for each of the controlled parameter.
  
• emergency protection of the station (in case the main controlled parameters deviate from the admissible values the light and sound alarm system starts up).
  
• emergency stop mode reset at the operator"s command.
  
• transmission and reception of the data from the operator"s workstation through the DH-485 interface
  

Control system structure

The system consists of a power-supply panel, control panel and of an operator"s workstation. Power supply panel maintains switching of electric equipment to the 220 V and 24 V power lines, short circuit safety, power up-state monitoring. For uninterruptable power supply 220 V the UPS with an extra battery is used. After the UPS the 220 V supply is connected to the doubled power source manufactured by the "2+1" scheme.

Uninterruptable 220 V and 24 V power supply proceed to the control panel and operator"s workstation.

The control panel is intended for collecting parameters set, automatic and manual control for compressor aggregate and emergency safety system. Mechanical parts are the Rittal panels which have the UL,CSA,TUV, Russian Maritime Register of Shipping, Lloyd Shipping Register. Shell safety degree - IP54.

Operator"s workstation

Operator"s workstation is intended for informing the staff about the compressor and auxiliary devices up-state.

Operator workstation ensures:

• displaying current sensors values;
  
• control system up-state monitoring;
  
• non-urgent alarm;
  
• emergency alarm and breakdown reason deciphering;
  
• protection and blocks up-state monitoring;
  
• signaling the doubled sensors error;
  
• statistic data gathering;
  
• transmitting operator"s commands to the controller;
  
• manual control for compressor auxiliary mechanisms;
  
• manual start/stop of the doubled sensors control (by password);
  
• configuration of non-urgent and emergency limits of analogous sensors values (by password)
  
• registering events, sensors values, operator"s actions, storing the archives within ten days;
  

Software features

The control system is developed on the basis of programmable logical controller by Allen-Bradley, SLC-500 series.

Software for the controller and operator workstation is developed with the help of Rockwell Software (Allen-Bradley software development subdivision).

We used the following packages:

• RS-Logic500 (programming of the controller series SLC500 and Micrologix 1000)
  
• RS-Linx (communication of different Windows applications with Allen-Bradley controllers)
  
• RS-View 32 (SCADA-system for realization of operator"s workstation).