Scottish Power - Longannet Flue Gas Desulphurisation

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Business Challenges

As the FGD plant was to be fitted to an existing power plant, the process control had to interact with the existing boiler control systems.

The challenge for Capula was to propose a suitable control systemsolution which would integrate into the existing system whilst giving Alstom Power a suitably powerful process control platform in which to install and commission the FGD plant.

Additional demands were placed upon all parties to implement the flue gas path part of the works at an early stage to enable the generating plant to be brought back to commercial operation at the earliest time.

How We Helped

Capula’s solution to Alstom and Scottish Power is based upon a Siemens Moore APACS system, which controls the flue gas path of the plant and integrates with the existing boiler control systems at Longannet, and a Rockwell ControlLogix PLC platform to control the three FGD absorber plants.

Both systems interface to the existing GE iFIX SCADA platform to enable process visualisation and supervisory control to be carried out by operators in the main control room.

All systems incorporated a high level of component redundancy, so that the failure of a single item would not cause the system to become available.