Plant description


  • AB3 Gas compression station consists of n° 1 Gas turbine Compressor.
  • AB8 Gas compression station consists of n° 3 Gas turbine Compressor (two stage).
  • Each Gas turbine compressor have a dedicated control system configured for:
  • Automatic start/stop sequence
  • Manual start/stop sequence
  • Emergency start/stop sequence
  • Control function
  • Antisurge control
  • Performance control
  • Overspeed protection
  • Vibration protection

The existing n° 3 compressor control panels located in AB3 station will remain as it is. The n° 3 Gas turbine control panels in AB3 station will be replaced with n° 3 new control system based on Rockwell Automation PLC and Supervisory computers.

The existing compressor control panel and gas turbine control panel located in AB8 station will be replaced with n° 1 new compressor control system and n° 1 Gas turbine control system, both based on Rockwell Automation PLC and Supervisory computers

The actual functionality, control values and performance of Gas turbine compressor must be guaranteed and maintained as it is.




SSE carried out the preliminary survey and collected all the basic engineering information for replacement of existing control system cabinets. SSE developed detailed engineering, construction, SW configuration and test for new control system cabinets. Existing control panels in control room has been removed and replaced with new CCS and UCP cabinets. Complete upgrade of AB8 compression station control system has been implemented, including the anti-surge algorithms and performance controller of centrifugal compressor. SSE technicians operated during installation, pre-commissioning and commissioning activities, up to start-up of the complete station, while SSE teacher trained the Customer’s operation and maintenance teams. CCS and UCP cabinets features a Rockwell Automation PLC ControlLogix with complete “redundant” HOT STAND-BY CPU architecture and simplex I/O. All installation revamping activity has been executed without interruption of normal station production. In order to satisfy this requirement, shut-down of one gas turbine for each time has been designed and managed during complete installation and start-up phase. The new control system in control room is equipped with n° 2 operator workstation,  and n° 1 engineering workstation for AB8 station, n° 3 operator workstation,  and n° 1 engineering workstation for AB3 station in multi-unit configuration based on Factory Talk supervisory, RS Logix configuration software



SUPPLY N° 1 Compressor Control System (CCS) in AB8 station
N° 1 Gas turbine Unit Control System (UCP) in AB8 station
N° 3 Gas turbine Unit Control System (UCP) in AB3 station
N° 2 Engineering workstation
N° 5 Operator workstations
N° 5 HMI panel mounted on UCP & CCS cabinets
CONTROLLER ControlLogix  (Rockwell Automation)
SUPERVISION Factory Talk (Rockwell Automation)


Type  of Project:

Mechanical and electrical upgrade of the existing control into an integrated control system for the Gas Turbine compressor trains.

The new control system shall guarantee a very safe, robust, reliable, durable and cost effective means for Gas turbine trains operation


Scope of supply:

Design, Engineering, construction SW configuration and test of new unit control panel (UCP) for Gas turbine compressor trains.

Installation, Commissioning  and  start-up activity for UCP’s in control rooms.



  • Higher  plant   “availability” thanks to reduced unplanned halts, reduced downtime for troubleshooting,
  • Full integrated plant wide control
  • Repairing and off the shelf spare parts.
  • Optimized plant performance resulting from prompt and accurate monitoring and control of functional parameters