Emerson to upgrade Unit 3 gas turbine at Senelec Cap des Biches power station in Senegal

Ovation^™ expert control system will enable precise and reliable combustion control

Emerson Process Management has been awarded a contract for the retrofit of the Unit 3 turbine at Senelec Cap des Biches power station in Senegal. The upgrad e to the new Ovation^™ controls will enable a number of operational benefits, including more precise and reliable combustion.

Located 23 km east of Dakar on the edge of the Atlantic, Cap des Biches is an important power station in Senegal with a rated output of 82 MW. The project is part of a national plan to revamp production capacities in Senegal with EDF CIT (Centre d’Ingenierie Thermique) appointed as technical advisor.

Emerson is appointed Main Contractor for the project covering the audit and evaluation of the existing control systems, scheduling for the dismantling of equipment to be replaced, design of the Ovation system, engineering drawings, FAT test plan and commissioning procedures. Emerson’s scope also includes installation, commissioning and operator training.

Emerson was awarded the contract following the successful completion of Units 1, 2 and 4 by Innovative Control Systems (ICS), which is now part of Emerson Process Management’s Power & Water Solutions group.

“Emerson was awarded this contract on the basis of its industry experience, turbine-retrofit expertise, and ability to provide a complete automation solution,” said Moussa Diagne, Production Director for Senelec. “Emerson has already upgraded three gas turbine units for Senelec and we know from these experiences that it has the best technologies to help Senelec meet the growing need for reliable energy in Senegal.”

The project covers the installation of the Pratt & Whitney Gas Turbine 3 (22MW) and new turbine controls and instrumentation. Emerson is also responsible for the installation of the refurbished gas engine including mechanically coupling it to the existing turbine elements on site. Emerson will replace the existing PLC-based control system with its Ovation expert control system with redundant controllers for overall control of the system. An Ovation supervisory system will replace the existing operator interface.

Emerson will also supply and install a new excitation system, vibration monitoring system, fire protection system and instrumentation, including integrating these systems into the Ovation system. Emerson will also retrofit existing mechanical equipment for dual fuel conversion, enabling the unit to run on gas or diesel fuel oil. Also included is the installation of new gas conversion equipment and a gas generator. The schedule for the project is 22 weeks.

Bob Yeager, president of the Power & Water Solutions division of Emerson Process Management said, “We are delighted that Senelec has chosen Emerson’s project management services, digital plant networks and advanced control systems to help provide higher levels of plant availability, reliability and environmental compliance.”

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